Code:
/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / whidbey / NetFxQFE / ndp / fx / src / WinForms / Managed / System / WinForms / ButtonBase.cs / 1 / ButtonBase.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Windows.Forms {
using System.Runtime.Serialization.Formatters;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Drawing.Imaging;
using System;
using System.Security.Permissions;
using System.Drawing.Drawing2D;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms.ButtonInternal;
using System.Windows.Forms.Layout;
using System.ComponentModel;
using Microsoft.Win32;
using System.Globalization;
///
///
/// Implements the basic functionality required by a button control.
///
///
[
ComVisible(true),
ClassInterface(ClassInterfaceType.AutoDispatch),
Designer("System.Windows.Forms.Design.ButtonBaseDesigner, " + AssemblyRef.SystemDesign)
]
public abstract class ButtonBase : Control {
private FlatStyle flatStyle = System.Windows.Forms.FlatStyle.Standard;
private ContentAlignment imageAlign = ContentAlignment.MiddleCenter;
private ContentAlignment textAlign = ContentAlignment.MiddleCenter;
private TextImageRelation textImageRelation = TextImageRelation.Overlay;
private ImageList.Indexer imageIndex = new ImageList.Indexer();
private FlatButtonAppearance flatAppearance;
private ImageList imageList;
private Image image;
private const int FlagMouseOver = 0x0001;
private const int FlagMouseDown = 0x0002;
private const int FlagMousePressed = 0x0004;
private const int FlagInButtonUp = 0x0008;
private const int FlagCurrentlyAnimating = 0x0010;
private const int FlagAutoEllipsis = 0x0020;
private const int FlagIsDefault = 0x0040;
private const int FlagUseMnemonic = 0x0080;
private const int FlagShowToolTip = 0x0100;
private int state = 0;
private ToolTip textToolTip;
//this allows the user to disable visual styles for the button so that it inherits its background color
private bool enableVisualStyleBackground = true;
private bool isEnableVisualStyleBackgroundSet = false;
///
///
/// Initializes a new instance of the
///
protected ButtonBase() {
// If Button doesn't want double-clicks, we should introduce a StandardDoubleClick style.
// Checkboxes probably want double-click's (#26120), and RadioButtons certainly do
// (useful e.g. on a Wizard).
SetStyle( ControlStyles.SupportsTransparentBackColor |
ControlStyles.Opaque |
ControlStyles.ResizeRedraw |
ControlStyles.OptimizedDoubleBuffer |
ControlStyles.CacheText | // We gain about 2% in painting by avoiding extra GetWindowText calls
ControlStyles.StandardClick,
true);
// this class overrides GetPreferredSizeCore, let Control automatically cache the result
SetState2(STATE2_USEPREFERREDSIZECACHE, true);
SetStyle(ControlStyles.UserMouse |
ControlStyles.UserPaint, OwnerDraw);
SetFlag(FlagUseMnemonic, true);
SetFlag(FlagShowToolTip, false);
}
///
/// This property controls the activation handling of bleedover for the text that
/// extends beyond the width of the button.
///
[
SRCategory(SR.CatBehavior),
DefaultValue(false),
Browsable(true),
EditorBrowsable(EditorBrowsableState.Always),
SRDescription(SR.ButtonAutoEllipsisDescr)
]
public bool AutoEllipsis {
get {
return GetFlag(FlagAutoEllipsis);
}
set {
if (AutoEllipsis != value) {
SetFlag(FlagAutoEllipsis, value);
if (value) {
if (textToolTip == null) {
textToolTip = new ToolTip();
}
}
Invalidate();
}
}
}
///
/// Indicates whether the control is automatically resized to fit its contents
///
[Browsable(true), EditorBrowsable(EditorBrowsableState.Always),
DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
public override bool AutoSize {
get {
return base.AutoSize;
}
set {
base.AutoSize = value;
//don't show ellipsis if the control is autosized
if (value) {
AutoEllipsis = false;
}
}
}
///
/// The background color of this control. This is an ambient property and
/// will always return a non-null value.
///
[
SRCategory(SR.CatAppearance),
SRDescription(SR.ControlBackColorDescr)
]
public override Color BackColor {
get {
return base.BackColor;
}
set {
if (DesignMode) {
if (value != Color.Empty) {
PropertyDescriptor pd = TypeDescriptor.GetProperties(this)["UseVisualStyleBackColor"];
Debug.Assert(pd != null);
if (pd != null) {
pd.SetValue(this, false);
}
}
}
else {
UseVisualStyleBackColor = false;
}
base.BackColor = value;
}
}
///
/// Deriving classes can override this to configure a default size for their control.
/// This is more efficient than setting the size in the control's constructor.
///
protected override Size DefaultSize {
get {
return new Size(75, 23);
}
}
///
/// [To be supplied.]
///
protected internal bool IsDefault {
get {
return GetFlag(FlagIsDefault);
}
set {
if (GetFlag(FlagIsDefault) != value) {
SetFlag(FlagIsDefault, value);
if (IsHandleCreated) {
if (OwnerDraw) {
Invalidate();
}
else {
UpdateStyles();
}
}
}
}
}
///
///
/// Gets or
/// sets
/// the flat style appearance of the button control.
///
///
[
SRCategory(SR.CatAppearance),
DefaultValue(FlatStyle.Standard),
Localizable(true),
SRDescription(SR.ButtonFlatStyleDescr)
]
public FlatStyle FlatStyle {
get {
return flatStyle;
}
set {
if (!ClientUtils.IsEnumValid(value, (int)value, (int)FlatStyle.Flat, (int)FlatStyle.System)){
throw new InvalidEnumArgumentException("value", (int)value, typeof(FlatStyle));
}
flatStyle = value;
LayoutTransaction.DoLayoutIf(AutoSize,ParentInternal, this, PropertyNames.FlatStyle);
Invalidate();
UpdateOwnerDraw();
}
}
///
///
[
Browsable(true),
SRCategory(SR.CatAppearance),
SRDescription(SR.ButtonFlatAppearance),
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
]
public FlatButtonAppearance FlatAppearance {
get {
if (flatAppearance == null) {
flatAppearance = new FlatButtonAppearance(this);
}
return flatAppearance;
}
}
///
///
/// Gets or sets the image
/// that is displayed on a button control.
///
///
[
SRDescription(SR.ButtonImageDescr),
Localizable(true),
SRCategory(SR.CatAppearance)
]
public Image Image {
get {
if (image == null && imageList != null) {
int actualIndex = imageIndex.ActualIndex;
// Pre-whidbey we used to use ImageIndex rather than ImageIndexer.ActualIndex.
// ImageIndex clamps to the length of the image list. We need to replicate
// this logic here for backwards compatibility. (VSWhidbey #95780)
// Per [....] we do not bake this into ImageIndexer because different controls
// treat this scenario differently.
if(actualIndex >= imageList.Images.Count) {
actualIndex = imageList.Images.Count - 1;
}
if (actualIndex >= 0) {
return imageList.Images[actualIndex];
}
Debug.Assert(image == null, "We expect to be returning null.");
}
return image;
}
set {
if (Image != value) {
StopAnimate();
image = value;
if (image != null) {
ImageIndex = -1;
ImageList = null;
}
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.Image);
Animate();
Invalidate();
}
}
}
///
///
/// Gets or sets the alignment of the image on the button control.
///
///
[
DefaultValue(ContentAlignment.MiddleCenter),
Localizable(true),
SRDescription(SR.ButtonImageAlignDescr),
SRCategory(SR.CatAppearance)
]
public ContentAlignment ImageAlign {
get {
return imageAlign;
}
set {
if (!WindowsFormsUtils.EnumValidator.IsValidContentAlignment(value)) {
throw new InvalidEnumArgumentException("value", (int)value, typeof(ContentAlignment));
}
if(value != imageAlign) {
imageAlign = value;
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.ImageAlign);
Invalidate();
}
}
}
///
///
/// Gets or sets the image list index value of the image
/// displayed on the button control.
///
///
[
TypeConverterAttribute(typeof(ImageIndexConverter)),
Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
Localizable(true),
DefaultValue(-1),
RefreshProperties(RefreshProperties.Repaint),
SRDescription(SR.ButtonImageIndexDescr),
SRCategory(SR.CatAppearance)
]
public int ImageIndex {
get {
if (imageIndex.Index != -1 && imageList != null && imageIndex.Index >= imageList.Images.Count) {
return imageList.Images.Count - 1;
}
return imageIndex.Index;
}
set {
if (value < -1) {
throw new ArgumentOutOfRangeException("ImageIndex", SR.GetString(SR.InvalidLowBoundArgumentEx, "ImageIndex", (value).ToString(CultureInfo.CurrentCulture), (-1).ToString(CultureInfo.CurrentCulture)));
}
if (imageIndex.Index != value) {
if (value != -1) {
// Image.set calls ImageIndex = -1
image = null;
}
// If they were previously using keys - this should clear out the image key field.
imageIndex.Index = value;
Invalidate();
}
}
}
///
///
/// Gets or sets the image list index key of the image
/// displayed on the button control. Note - setting this unsets the ImageIndex
///
///
[
TypeConverterAttribute(typeof(ImageKeyConverter)),
Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
Localizable(true),
DefaultValue(""),
RefreshProperties(RefreshProperties.Repaint),
SRDescription(SR.ButtonImageIndexDescr),
SRCategory(SR.CatAppearance)
]
public string ImageKey {
get {
return imageIndex.Key;
}
set {
if (imageIndex.Key != value) {
if (value != null) {
// Image.set calls ImageIndex = -1
image = null;
}
// If they were previously using indexes - this should clear out the image index field.
imageIndex.Key = value;
Invalidate();
}
}
}
///
///
/// Gets or sets the
///
[
DefaultValue(null),
SRDescription(SR.ButtonImageListDescr),
RefreshProperties(RefreshProperties.Repaint),
SRCategory(SR.CatAppearance)
]
public ImageList ImageList {
get {
return imageList;
}
set {
if (imageList != value) {
EventHandler recreateHandler = new EventHandler(ImageListRecreateHandle);
EventHandler disposedHandler = new EventHandler(DetachImageList);
// Detach old event handlers
//
if (imageList != null) {
imageList.RecreateHandle -= recreateHandler;
imageList.Disposed -= disposedHandler;
}
// Make sure we don't have an Image as well as an ImageList
//
if (value != null) {
image = null; // Image.set calls ImageList = null
}
imageList = value;
imageIndex.ImageList = value;
// Wire up new event handlers
//
if (value != null) {
value.RecreateHandle += recreateHandler;
value.Disposed += disposedHandler;
}
Invalidate();
}
}
}
///
/// Specifies whether the control is willing to process mnemonics when hosted in an container ActiveX (Ax Sourcing).
///
internal override bool IsMnemonicsListenerAxSourced
{
get{
return true;
}
}
///
///
/// The area of the button encompassing any changes between the button's
/// resting appearance and its appearance when the mouse is over it.
///
///
/// Consider overriding this property if you override any painting methods,
/// or your button may not paint correctly or may have flicker. Returning
/// ClientRectangle is safe for correct painting but may still cause flicker.
///
///
internal virtual Rectangle OverChangeRectangle {
get {
if (FlatStyle == FlatStyle.Standard) {
// this Rectangle will cause no Invalidation
// can't use Rectangle.Empty because it will cause Invalidate(ClientRectangle)
return new Rectangle(-1, -1, 1, 1);
}
else {
return ClientRectangle;
}
}
}
internal bool OwnerDraw {
get {
return FlatStyle != FlatStyle.System;
}
}
///
///
/// The area of the button encompassing any changes between the button's
/// appearance when the mouse is over it but not pressed and when it is pressed.
///
///
/// Consider overriding this property if you override any painting methods,
/// or your button may not paint correctly or may have flicker. Returning
/// ClientRectangle is safe for correct painting but may still cause flicker.
///
///
internal virtual Rectangle DownChangeRectangle {
get {
return ClientRectangle;
}
}
internal bool MouseIsPressed {
get {
return GetFlag(FlagMousePressed);
}
}
// a "smart" version of mouseDown for Appearance.Button CheckBoxes & RadioButtons
// for these, instead of being based on the actual mouse state, it's based on the appropriate button state
internal bool MouseIsDown {
get {
return GetFlag(FlagMouseDown);
}
}
// a "smart" version of mouseOver for Appearance.Button CheckBoxes & RadioButtons
// for these, instead of being based on the actual mouse state, it's based on the appropriate button state
internal bool MouseIsOver {
get {
return GetFlag(FlagMouseOver);
}
}
///
/// Indicates whether the tooltip should be shown
///
internal bool ShowToolTip {
get {
return GetFlag(FlagShowToolTip);
}
set {
SetFlag(FlagShowToolTip, value);
}
}
[
Editor("System.ComponentModel.Design.MultilineStringEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
SettingsBindable(true)
]
public override string Text {
get {
return base.Text;
}
set {
base.Text = value;
}
}
///
///
/// Gets or sets the alignment of the text on the button control.
///
///
[
DefaultValue(ContentAlignment.MiddleCenter),
Localizable(true),
SRDescription(SR.ButtonTextAlignDescr),
SRCategory(SR.CatAppearance)
]
public virtual ContentAlignment TextAlign {
get {
return textAlign;
}
set {
if (!WindowsFormsUtils.EnumValidator.IsValidContentAlignment(value)) {
throw new InvalidEnumArgumentException("value", (int)value, typeof(ContentAlignment));
}
if(value != textAlign) {
textAlign = value;
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.TextAlign);
if (OwnerDraw) {
Invalidate();
}
else {
UpdateStyles();
}
}
}
}
///
/// Gets or sets a value indicating whether an ampersand (&) included in the text of
/// the control.
///
[
SRDescription(SR.ButtonUseMnemonicDescr),
DefaultValue(true),
SRCategory(SR.CatAppearance)
]
public bool UseMnemonic {
get {
return GetFlag(FlagUseMnemonic);
}
set {
SetFlag(FlagUseMnemonic, value);
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.Text);
Invalidate();
}
}
private void Animate() {
Animate(!DesignMode && Visible && Enabled && ParentInternal != null);
}
private void StopAnimate() {
Animate(false);
}
private void Animate(bool animate) {
if (animate != GetFlag(FlagCurrentlyAnimating)) {
if (animate) {
if (this.image != null) {
ImageAnimator.Animate(this.image, new EventHandler(this.OnFrameChanged));
SetFlag(FlagCurrentlyAnimating, animate);
}
}
else {
if (this.image != null) {
ImageAnimator.StopAnimate(this.image, new EventHandler(this.OnFrameChanged));
SetFlag(FlagCurrentlyAnimating, animate);
}
}
}
}
///
///
///
///
/// Raises the
///
protected override void OnGotFocus(EventArgs e) {
base.OnGotFocus(e);
Invalidate();
}
///
///
/// Raises the
///
protected override void OnLostFocus(EventArgs e) {
base.OnLostFocus(e);
// Hitting tab while holding down the space key. See ASURT 38669.
SetFlag(FlagMouseDown, false);
CaptureInternal = false;
Invalidate();
}
///
///
/// Raises the
///
protected override void OnMouseEnter(EventArgs eventargs) {
Debug.Assert(Enabled, "ButtonBase.OnMouseEnter should not be called if the button is disabled");
SetFlag(FlagMouseOver, true);
Invalidate();
if (!DesignMode && AutoEllipsis && ShowToolTip && textToolTip != null) {
// SECREVIEW: VSWhidbey 531915 - ToolTip should show in internet zone
IntSecurity.AllWindows.Assert();
try {
textToolTip.Show(WindowsFormsUtils.TextWithoutMnemonics(Text), this);
}
finally {
System.Security.CodeAccessPermission.RevertAssert();
}
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseEnter(eventargs);
}
///
///
/// Raises the
///
protected override void OnMouseLeave(EventArgs eventargs) {
SetFlag(FlagMouseOver, false);
if (textToolTip != null) {
// SECREVIEW: VSWhidbey 531915 - ToolTip should show in internet zone
IntSecurity.AllWindows.Assert();
try {
textToolTip.Hide(this);
}
finally {
System.Security.CodeAccessPermission.RevertAssert();
}
}
Invalidate();
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseLeave(eventargs);
}
///
///
/// Raises the
///
protected override void OnMouseMove(MouseEventArgs mevent) {
Debug.Assert(Enabled, "ButtonBase.OnMouseMove should not be called if the button is disabled");
if (mevent.Button != MouseButtons.None && GetFlag(FlagMousePressed)) {
Rectangle r = ClientRectangle;
if (!r.Contains(mevent.X, mevent.Y)) {
if (GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, false);
Invalidate(DownChangeRectangle);
}
}
else {
if (!GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, true);
Invalidate(DownChangeRectangle);
}
}
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseMove(mevent);
}
///
///
/// Raises the
///
protected override void OnMouseDown(MouseEventArgs mevent) {
Debug.Assert(Enabled, "ButtonBase.OnMouseDown should not be called if the button is disabled");
if (mevent.Button == MouseButtons.Left) {
SetFlag(FlagMouseDown, true);
SetFlag(FlagMousePressed, true);
Invalidate(DownChangeRectangle);
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseDown(mevent);
}
///
///
/// Raises the
///
protected override void OnMouseUp(MouseEventArgs mevent) {
base.OnMouseUp(mevent);
}
///
///
/// Used for quick re-painting of the button after the pressed state.
///
///
protected void ResetFlagsandPaint() {
SetFlag(FlagMousePressed, false);
SetFlag(FlagMouseDown, false);
Invalidate(DownChangeRectangle);
Update();
}
///
/// Central paint dispatcher to one of the three styles of painting.
///
private void PaintControl(PaintEventArgs pevent) {
Debug.Assert(GetStyle(ControlStyles.UserPaint), "Shouldn't be in PaintControl when control is not UserPaint style");
Adapter.Paint(pevent);
}
public override Size GetPreferredSize( Size proposedSize ) {
// TableLayoutPanel passes width = 1 to get the minimum autosize width, since Buttons word-break text
// that width would be the size of the widest caracter in the text. We need to make the proposed size
// unbounded.
// This is the same as what Label does.
if( proposedSize.Width == 1 ) {
proposedSize.Width = 0;
}
if( proposedSize.Height == 1 ) {
proposedSize.Height = 0;
}
return base.GetPreferredSize( proposedSize );
}
internal override Size GetPreferredSizeCore(Size proposedConstraints) {
Size prefSize = Adapter.GetPreferredSizeCore(proposedConstraints);
return LayoutUtils.UnionSizes(prefSize + Padding.Size, MinimumSize);
}
private ButtonBaseAdapter _adapter = null;
private FlatStyle _cachedAdapterType;
internal ButtonBaseAdapter Adapter {
get {
if(_adapter == null || FlatStyle != _cachedAdapterType) {
switch (FlatStyle) {
case FlatStyle.Standard:
_adapter = CreateStandardAdapter();
break;
case FlatStyle.Popup:
_adapter = CreatePopupAdapter();
break;
case FlatStyle.Flat:
_adapter = CreateFlatAdapter();;
break;
default:
Debug.Fail("Unsupported FlatStyle: '" + FlatStyle + '"');
break;
}
_cachedAdapterType = FlatStyle;
}
return _adapter;
}
}
internal virtual ButtonBaseAdapter CreateFlatAdapter() {
Debug.Fail("Derived classes need to provide a meaningful implementation.");
return null;
}
internal virtual ButtonBaseAdapter CreatePopupAdapter() {
Debug.Fail("Derived classes need to provide a meaningful implementation.");
return null;
}
internal virtual ButtonBaseAdapter CreateStandardAdapter() {
Debug.Fail("Derived classes need to provide a meaningful implementation.");
return null;
}
internal virtual StringFormat CreateStringFormat() {
if( Adapter == null ) {
Debug.Fail("Adapter not expected to be null at this point");
return new StringFormat();
}
return Adapter.CreateStringFormat();
}
internal virtual TextFormatFlags CreateTextFormatFlags() {
if( Adapter == null ) {
Debug.Fail( "Adapter not expected to be null at this point" );
return TextFormatFlags.Default;
}
return Adapter.CreateTextFormatFlags();
}
private void OnFrameChanged(object o, EventArgs e) {
if (Disposing || IsDisposed) {
return;
}
if (IsHandleCreated && InvokeRequired) {
BeginInvoke(new EventHandler(this.OnFrameChanged), new object[]{o,e});
return;
}
if (IsWindowObscured) {
StopAnimate();
return;
}
Invalidate();
}
///
/// [To be supplied.]
///
protected override void OnEnabledChanged(EventArgs e) {
base.OnEnabledChanged(e);
Animate();
if (!Enabled) {
// disabled button is always "up"
SetFlag(FlagMouseDown, false);
SetFlag(FlagMouseOver, false);
Invalidate();
}
}
///
/// [To be supplied.]
///
protected override void OnTextChanged(EventArgs e) {
using(LayoutTransaction.CreateTransactionIf(AutoSize, ParentInternal, this, PropertyNames.Text)) {
base.OnTextChanged(e);
Invalidate();
}
}
///
///
/// Raises the
///
protected override void OnKeyDown(KeyEventArgs kevent) {
Debug.Assert(Enabled, "ButtonBase.OnKeyDown should not be called if the button is disabled");
if (kevent.KeyData == Keys.Space) {
if (!GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, true);
// It looks like none of the "SPACE" key downs generate the BM_SETSTATE.
// This causes to not draw the focus rectangle inside the button and also
// not paint the button as "un-depressed".
//
if(!OwnerDraw) {
SendMessage(NativeMethods.BM_SETSTATE, 1, 0);
}
Invalidate(DownChangeRectangle);
}
kevent.Handled = true;
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnKeyDown(kevent);
}
///
///
/// Raises the
///
protected override void OnKeyUp(KeyEventArgs kevent) {
if (GetFlag(FlagMouseDown) && !ValidationCancelled) {
if (OwnerDraw) {
ResetFlagsandPaint();
}
else {
SetFlag(FlagMousePressed, false);
SetFlag(FlagMouseDown, false);
SendMessage(NativeMethods.BM_SETSTATE, 0, 0);
}
// VSWhidbey 498398: Breaking change: specifically filter out Keys.Enter and Keys.Space as the only
// two keystrokes to execute OnClick.
if (kevent.KeyCode == Keys.Enter || kevent.KeyCode == Keys.Space) {
OnClick(EventArgs.Empty);
}
kevent.Handled = true;
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnKeyUp(kevent);
}
///
///
/// Raises the
///
protected override void OnPaint(PaintEventArgs pevent) {
if( AutoEllipsis ){
Size preferredSize = PreferredSize;
ShowToolTip = (this.ClientRectangle.Width < preferredSize.Width || this.ClientRectangle.Height < preferredSize.Height);
}
else {
ShowToolTip = false;
}
if (GetStyle(ControlStyles.UserPaint)) {
Animate();
ImageAnimator.UpdateFrames();
PaintControl(pevent);
}
base.OnPaint(pevent);
}
///
/// [To be supplied.]
///
protected override void OnParentChanged(EventArgs e) {
base.OnParentChanged(e);
Animate();
}
///
/// [To be supplied.]
///
protected override void OnVisibleChanged(EventArgs e) {
base.OnVisibleChanged(e);
Animate();
}
private void ResetImage() {
Image = null;
}
private void SetFlag(int flag, bool value) {
bool oldValue = ((state & flag) != 0);
if (value) {
state |= flag;
}
else {
state &= ~flag;
}
if (OwnerDraw && (flag & FlagMouseDown) != 0 && value != oldValue) {
AccessibilityNotifyClients(AccessibleEvents.StateChange, -1);
}
}
private bool ShouldSerializeImage() {
return image != null;
}
private void UpdateOwnerDraw() {
if (OwnerDraw != GetStyle(ControlStyles.UserPaint)) {
SetStyle(ControlStyles.UserMouse | ControlStyles.UserPaint, OwnerDraw);
RecreateHandle();
}
}
///
/// Determines whether to use compatible text rendering engine (GDI+) or not (GDI).
///
[
DefaultValue(false),
SRCategory(SR.CatBehavior),
SRDescription(SR.UseCompatibleTextRenderingDescr)
]
public bool UseCompatibleTextRendering {
get{
return base.UseCompatibleTextRenderingInt;
}
set{
base.UseCompatibleTextRenderingInt = value;
}
}
///
/// Determines whether the control supports rendering text using GDI+ and GDI.
/// This is provided for container controls to iterate through its children to set UseCompatibleTextRendering to the same
/// value if the child control supports it.
///
internal override bool SupportsUseCompatibleTextRendering {
get {
return true;
}
}
///
/// [To be supplied.]
///
[SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.UnmanagedCode)]
protected override void WndProc(ref Message m) {
switch (m.Msg) {
// NDPWhidbey 28043 -- we don't respect this because the code below eats BM_SETSTATE.
// so we just invoke the click.
//
case NativeMethods.BM_CLICK:
if (this is IButtonControl) {
((IButtonControl)this).PerformClick();
}
else {
OnClick(EventArgs.Empty);
}
return;
}
if (OwnerDraw) {
switch (m.Msg) {
case NativeMethods.BM_SETSTATE:
// Ignore BM_SETSTATE -- Windows gets confused and paints
// things, even though we are ownerdraw. See ASURT 38669.
break;
case NativeMethods.WM_KILLFOCUS:
case NativeMethods.WM_CANCELMODE:
case NativeMethods.WM_CAPTURECHANGED:
if (!GetFlag(FlagInButtonUp) && GetFlag(FlagMousePressed)) {
SetFlag(FlagMousePressed, false);
if (GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, false);
Invalidate(DownChangeRectangle);
}
}
base.WndProc(ref m);
break;
case NativeMethods.WM_LBUTTONUP:
case NativeMethods.WM_MBUTTONUP:
case NativeMethods.WM_RBUTTONUP:
try {
SetFlag(FlagInButtonUp, true);
base.WndProc(ref m);
}
finally {
SetFlag(FlagInButtonUp, false);
}
break;
default:
base.WndProc(ref m);
break;
}
}
else {
switch (m.Msg) {
case NativeMethods.WM_REFLECT + NativeMethods.WM_COMMAND:
if (NativeMethods.Util.HIWORD(m.WParam) == NativeMethods.BN_CLICKED && !ValidationCancelled) {
OnClick(EventArgs.Empty);
}
break;
default:
base.WndProc(ref m);
break;
}
}
}
///
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
namespace System.Windows.Forms {
using System.Runtime.Serialization.Formatters;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Drawing.Imaging;
using System;
using System.Security.Permissions;
using System.Drawing.Drawing2D;
using System.Drawing;
using System.Drawing.Design;
using System.Windows.Forms.ButtonInternal;
using System.Windows.Forms.Layout;
using System.ComponentModel;
using Microsoft.Win32;
using System.Globalization;
///
///
/// Implements the basic functionality required by a button control.
///
///
[
ComVisible(true),
ClassInterface(ClassInterfaceType.AutoDispatch),
Designer("System.Windows.Forms.Design.ButtonBaseDesigner, " + AssemblyRef.SystemDesign)
]
public abstract class ButtonBase : Control {
private FlatStyle flatStyle = System.Windows.Forms.FlatStyle.Standard;
private ContentAlignment imageAlign = ContentAlignment.MiddleCenter;
private ContentAlignment textAlign = ContentAlignment.MiddleCenter;
private TextImageRelation textImageRelation = TextImageRelation.Overlay;
private ImageList.Indexer imageIndex = new ImageList.Indexer();
private FlatButtonAppearance flatAppearance;
private ImageList imageList;
private Image image;
private const int FlagMouseOver = 0x0001;
private const int FlagMouseDown = 0x0002;
private const int FlagMousePressed = 0x0004;
private const int FlagInButtonUp = 0x0008;
private const int FlagCurrentlyAnimating = 0x0010;
private const int FlagAutoEllipsis = 0x0020;
private const int FlagIsDefault = 0x0040;
private const int FlagUseMnemonic = 0x0080;
private const int FlagShowToolTip = 0x0100;
private int state = 0;
private ToolTip textToolTip;
//this allows the user to disable visual styles for the button so that it inherits its background color
private bool enableVisualStyleBackground = true;
private bool isEnableVisualStyleBackgroundSet = false;
///
///
/// Initializes a new instance of the
///
protected ButtonBase() {
// If Button doesn't want double-clicks, we should introduce a StandardDoubleClick style.
// Checkboxes probably want double-click's (#26120), and RadioButtons certainly do
// (useful e.g. on a Wizard).
SetStyle( ControlStyles.SupportsTransparentBackColor |
ControlStyles.Opaque |
ControlStyles.ResizeRedraw |
ControlStyles.OptimizedDoubleBuffer |
ControlStyles.CacheText | // We gain about 2% in painting by avoiding extra GetWindowText calls
ControlStyles.StandardClick,
true);
// this class overrides GetPreferredSizeCore, let Control automatically cache the result
SetState2(STATE2_USEPREFERREDSIZECACHE, true);
SetStyle(ControlStyles.UserMouse |
ControlStyles.UserPaint, OwnerDraw);
SetFlag(FlagUseMnemonic, true);
SetFlag(FlagShowToolTip, false);
}
///
/// This property controls the activation handling of bleedover for the text that
/// extends beyond the width of the button.
///
[
SRCategory(SR.CatBehavior),
DefaultValue(false),
Browsable(true),
EditorBrowsable(EditorBrowsableState.Always),
SRDescription(SR.ButtonAutoEllipsisDescr)
]
public bool AutoEllipsis {
get {
return GetFlag(FlagAutoEllipsis);
}
set {
if (AutoEllipsis != value) {
SetFlag(FlagAutoEllipsis, value);
if (value) {
if (textToolTip == null) {
textToolTip = new ToolTip();
}
}
Invalidate();
}
}
}
///
/// Indicates whether the control is automatically resized to fit its contents
///
[Browsable(true), EditorBrowsable(EditorBrowsableState.Always),
DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
public override bool AutoSize {
get {
return base.AutoSize;
}
set {
base.AutoSize = value;
//don't show ellipsis if the control is autosized
if (value) {
AutoEllipsis = false;
}
}
}
///
/// The background color of this control. This is an ambient property and
/// will always return a non-null value.
///
[
SRCategory(SR.CatAppearance),
SRDescription(SR.ControlBackColorDescr)
]
public override Color BackColor {
get {
return base.BackColor;
}
set {
if (DesignMode) {
if (value != Color.Empty) {
PropertyDescriptor pd = TypeDescriptor.GetProperties(this)["UseVisualStyleBackColor"];
Debug.Assert(pd != null);
if (pd != null) {
pd.SetValue(this, false);
}
}
}
else {
UseVisualStyleBackColor = false;
}
base.BackColor = value;
}
}
///
/// Deriving classes can override this to configure a default size for their control.
/// This is more efficient than setting the size in the control's constructor.
///
protected override Size DefaultSize {
get {
return new Size(75, 23);
}
}
///
/// [To be supplied.]
///
protected internal bool IsDefault {
get {
return GetFlag(FlagIsDefault);
}
set {
if (GetFlag(FlagIsDefault) != value) {
SetFlag(FlagIsDefault, value);
if (IsHandleCreated) {
if (OwnerDraw) {
Invalidate();
}
else {
UpdateStyles();
}
}
}
}
}
///
///
/// Gets or
/// sets
/// the flat style appearance of the button control.
///
///
[
SRCategory(SR.CatAppearance),
DefaultValue(FlatStyle.Standard),
Localizable(true),
SRDescription(SR.ButtonFlatStyleDescr)
]
public FlatStyle FlatStyle {
get {
return flatStyle;
}
set {
if (!ClientUtils.IsEnumValid(value, (int)value, (int)FlatStyle.Flat, (int)FlatStyle.System)){
throw new InvalidEnumArgumentException("value", (int)value, typeof(FlatStyle));
}
flatStyle = value;
LayoutTransaction.DoLayoutIf(AutoSize,ParentInternal, this, PropertyNames.FlatStyle);
Invalidate();
UpdateOwnerDraw();
}
}
///
///
[
Browsable(true),
SRCategory(SR.CatAppearance),
SRDescription(SR.ButtonFlatAppearance),
DesignerSerializationVisibility(DesignerSerializationVisibility.Content),
]
public FlatButtonAppearance FlatAppearance {
get {
if (flatAppearance == null) {
flatAppearance = new FlatButtonAppearance(this);
}
return flatAppearance;
}
}
///
///
/// Gets or sets the image
/// that is displayed on a button control.
///
///
[
SRDescription(SR.ButtonImageDescr),
Localizable(true),
SRCategory(SR.CatAppearance)
]
public Image Image {
get {
if (image == null && imageList != null) {
int actualIndex = imageIndex.ActualIndex;
// Pre-whidbey we used to use ImageIndex rather than ImageIndexer.ActualIndex.
// ImageIndex clamps to the length of the image list. We need to replicate
// this logic here for backwards compatibility. (VSWhidbey #95780)
// Per [....] we do not bake this into ImageIndexer because different controls
// treat this scenario differently.
if(actualIndex >= imageList.Images.Count) {
actualIndex = imageList.Images.Count - 1;
}
if (actualIndex >= 0) {
return imageList.Images[actualIndex];
}
Debug.Assert(image == null, "We expect to be returning null.");
}
return image;
}
set {
if (Image != value) {
StopAnimate();
image = value;
if (image != null) {
ImageIndex = -1;
ImageList = null;
}
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.Image);
Animate();
Invalidate();
}
}
}
///
///
/// Gets or sets the alignment of the image on the button control.
///
///
[
DefaultValue(ContentAlignment.MiddleCenter),
Localizable(true),
SRDescription(SR.ButtonImageAlignDescr),
SRCategory(SR.CatAppearance)
]
public ContentAlignment ImageAlign {
get {
return imageAlign;
}
set {
if (!WindowsFormsUtils.EnumValidator.IsValidContentAlignment(value)) {
throw new InvalidEnumArgumentException("value", (int)value, typeof(ContentAlignment));
}
if(value != imageAlign) {
imageAlign = value;
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.ImageAlign);
Invalidate();
}
}
}
///
///
/// Gets or sets the image list index value of the image
/// displayed on the button control.
///
///
[
TypeConverterAttribute(typeof(ImageIndexConverter)),
Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
Localizable(true),
DefaultValue(-1),
RefreshProperties(RefreshProperties.Repaint),
SRDescription(SR.ButtonImageIndexDescr),
SRCategory(SR.CatAppearance)
]
public int ImageIndex {
get {
if (imageIndex.Index != -1 && imageList != null && imageIndex.Index >= imageList.Images.Count) {
return imageList.Images.Count - 1;
}
return imageIndex.Index;
}
set {
if (value < -1) {
throw new ArgumentOutOfRangeException("ImageIndex", SR.GetString(SR.InvalidLowBoundArgumentEx, "ImageIndex", (value).ToString(CultureInfo.CurrentCulture), (-1).ToString(CultureInfo.CurrentCulture)));
}
if (imageIndex.Index != value) {
if (value != -1) {
// Image.set calls ImageIndex = -1
image = null;
}
// If they were previously using keys - this should clear out the image key field.
imageIndex.Index = value;
Invalidate();
}
}
}
///
///
/// Gets or sets the image list index key of the image
/// displayed on the button control. Note - setting this unsets the ImageIndex
///
///
[
TypeConverterAttribute(typeof(ImageKeyConverter)),
Editor("System.Windows.Forms.Design.ImageIndexEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
Localizable(true),
DefaultValue(""),
RefreshProperties(RefreshProperties.Repaint),
SRDescription(SR.ButtonImageIndexDescr),
SRCategory(SR.CatAppearance)
]
public string ImageKey {
get {
return imageIndex.Key;
}
set {
if (imageIndex.Key != value) {
if (value != null) {
// Image.set calls ImageIndex = -1
image = null;
}
// If they were previously using indexes - this should clear out the image index field.
imageIndex.Key = value;
Invalidate();
}
}
}
///
///
/// Gets or sets the
///
[
DefaultValue(null),
SRDescription(SR.ButtonImageListDescr),
RefreshProperties(RefreshProperties.Repaint),
SRCategory(SR.CatAppearance)
]
public ImageList ImageList {
get {
return imageList;
}
set {
if (imageList != value) {
EventHandler recreateHandler = new EventHandler(ImageListRecreateHandle);
EventHandler disposedHandler = new EventHandler(DetachImageList);
// Detach old event handlers
//
if (imageList != null) {
imageList.RecreateHandle -= recreateHandler;
imageList.Disposed -= disposedHandler;
}
// Make sure we don't have an Image as well as an ImageList
//
if (value != null) {
image = null; // Image.set calls ImageList = null
}
imageList = value;
imageIndex.ImageList = value;
// Wire up new event handlers
//
if (value != null) {
value.RecreateHandle += recreateHandler;
value.Disposed += disposedHandler;
}
Invalidate();
}
}
}
///
/// Specifies whether the control is willing to process mnemonics when hosted in an container ActiveX (Ax Sourcing).
///
internal override bool IsMnemonicsListenerAxSourced
{
get{
return true;
}
}
///
///
/// The area of the button encompassing any changes between the button's
/// resting appearance and its appearance when the mouse is over it.
///
///
/// Consider overriding this property if you override any painting methods,
/// or your button may not paint correctly or may have flicker. Returning
/// ClientRectangle is safe for correct painting but may still cause flicker.
///
///
internal virtual Rectangle OverChangeRectangle {
get {
if (FlatStyle == FlatStyle.Standard) {
// this Rectangle will cause no Invalidation
// can't use Rectangle.Empty because it will cause Invalidate(ClientRectangle)
return new Rectangle(-1, -1, 1, 1);
}
else {
return ClientRectangle;
}
}
}
internal bool OwnerDraw {
get {
return FlatStyle != FlatStyle.System;
}
}
///
///
/// The area of the button encompassing any changes between the button's
/// appearance when the mouse is over it but not pressed and when it is pressed.
///
///
/// Consider overriding this property if you override any painting methods,
/// or your button may not paint correctly or may have flicker. Returning
/// ClientRectangle is safe for correct painting but may still cause flicker.
///
///
internal virtual Rectangle DownChangeRectangle {
get {
return ClientRectangle;
}
}
internal bool MouseIsPressed {
get {
return GetFlag(FlagMousePressed);
}
}
// a "smart" version of mouseDown for Appearance.Button CheckBoxes & RadioButtons
// for these, instead of being based on the actual mouse state, it's based on the appropriate button state
internal bool MouseIsDown {
get {
return GetFlag(FlagMouseDown);
}
}
// a "smart" version of mouseOver for Appearance.Button CheckBoxes & RadioButtons
// for these, instead of being based on the actual mouse state, it's based on the appropriate button state
internal bool MouseIsOver {
get {
return GetFlag(FlagMouseOver);
}
}
///
/// Indicates whether the tooltip should be shown
///
internal bool ShowToolTip {
get {
return GetFlag(FlagShowToolTip);
}
set {
SetFlag(FlagShowToolTip, value);
}
}
[
Editor("System.ComponentModel.Design.MultilineStringEditor, " + AssemblyRef.SystemDesign, typeof(UITypeEditor)),
SettingsBindable(true)
]
public override string Text {
get {
return base.Text;
}
set {
base.Text = value;
}
}
///
///
/// Gets or sets the alignment of the text on the button control.
///
///
[
DefaultValue(ContentAlignment.MiddleCenter),
Localizable(true),
SRDescription(SR.ButtonTextAlignDescr),
SRCategory(SR.CatAppearance)
]
public virtual ContentAlignment TextAlign {
get {
return textAlign;
}
set {
if (!WindowsFormsUtils.EnumValidator.IsValidContentAlignment(value)) {
throw new InvalidEnumArgumentException("value", (int)value, typeof(ContentAlignment));
}
if(value != textAlign) {
textAlign = value;
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.TextAlign);
if (OwnerDraw) {
Invalidate();
}
else {
UpdateStyles();
}
}
}
}
///
/// Gets or sets a value indicating whether an ampersand (&) included in the text of
/// the control.
///
[
SRDescription(SR.ButtonUseMnemonicDescr),
DefaultValue(true),
SRCategory(SR.CatAppearance)
]
public bool UseMnemonic {
get {
return GetFlag(FlagUseMnemonic);
}
set {
SetFlag(FlagUseMnemonic, value);
LayoutTransaction.DoLayoutIf(AutoSize, ParentInternal, this, PropertyNames.Text);
Invalidate();
}
}
private void Animate() {
Animate(!DesignMode && Visible && Enabled && ParentInternal != null);
}
private void StopAnimate() {
Animate(false);
}
private void Animate(bool animate) {
if (animate != GetFlag(FlagCurrentlyAnimating)) {
if (animate) {
if (this.image != null) {
ImageAnimator.Animate(this.image, new EventHandler(this.OnFrameChanged));
SetFlag(FlagCurrentlyAnimating, animate);
}
}
else {
if (this.image != null) {
ImageAnimator.StopAnimate(this.image, new EventHandler(this.OnFrameChanged));
SetFlag(FlagCurrentlyAnimating, animate);
}
}
}
}
///
///
///
///
/// Raises the
///
protected override void OnGotFocus(EventArgs e) {
base.OnGotFocus(e);
Invalidate();
}
///
///
/// Raises the
///
protected override void OnLostFocus(EventArgs e) {
base.OnLostFocus(e);
// Hitting tab while holding down the space key. See ASURT 38669.
SetFlag(FlagMouseDown, false);
CaptureInternal = false;
Invalidate();
}
///
///
/// Raises the
///
protected override void OnMouseEnter(EventArgs eventargs) {
Debug.Assert(Enabled, "ButtonBase.OnMouseEnter should not be called if the button is disabled");
SetFlag(FlagMouseOver, true);
Invalidate();
if (!DesignMode && AutoEllipsis && ShowToolTip && textToolTip != null) {
// SECREVIEW: VSWhidbey 531915 - ToolTip should show in internet zone
IntSecurity.AllWindows.Assert();
try {
textToolTip.Show(WindowsFormsUtils.TextWithoutMnemonics(Text), this);
}
finally {
System.Security.CodeAccessPermission.RevertAssert();
}
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseEnter(eventargs);
}
///
///
/// Raises the
///
protected override void OnMouseLeave(EventArgs eventargs) {
SetFlag(FlagMouseOver, false);
if (textToolTip != null) {
// SECREVIEW: VSWhidbey 531915 - ToolTip should show in internet zone
IntSecurity.AllWindows.Assert();
try {
textToolTip.Hide(this);
}
finally {
System.Security.CodeAccessPermission.RevertAssert();
}
}
Invalidate();
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseLeave(eventargs);
}
///
///
/// Raises the
///
protected override void OnMouseMove(MouseEventArgs mevent) {
Debug.Assert(Enabled, "ButtonBase.OnMouseMove should not be called if the button is disabled");
if (mevent.Button != MouseButtons.None && GetFlag(FlagMousePressed)) {
Rectangle r = ClientRectangle;
if (!r.Contains(mevent.X, mevent.Y)) {
if (GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, false);
Invalidate(DownChangeRectangle);
}
}
else {
if (!GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, true);
Invalidate(DownChangeRectangle);
}
}
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseMove(mevent);
}
///
///
/// Raises the
///
protected override void OnMouseDown(MouseEventArgs mevent) {
Debug.Assert(Enabled, "ButtonBase.OnMouseDown should not be called if the button is disabled");
if (mevent.Button == MouseButtons.Left) {
SetFlag(FlagMouseDown, true);
SetFlag(FlagMousePressed, true);
Invalidate(DownChangeRectangle);
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnMouseDown(mevent);
}
///
///
/// Raises the
///
protected override void OnMouseUp(MouseEventArgs mevent) {
base.OnMouseUp(mevent);
}
///
///
/// Used for quick re-painting of the button after the pressed state.
///
///
protected void ResetFlagsandPaint() {
SetFlag(FlagMousePressed, false);
SetFlag(FlagMouseDown, false);
Invalidate(DownChangeRectangle);
Update();
}
///
/// Central paint dispatcher to one of the three styles of painting.
///
private void PaintControl(PaintEventArgs pevent) {
Debug.Assert(GetStyle(ControlStyles.UserPaint), "Shouldn't be in PaintControl when control is not UserPaint style");
Adapter.Paint(pevent);
}
public override Size GetPreferredSize( Size proposedSize ) {
// TableLayoutPanel passes width = 1 to get the minimum autosize width, since Buttons word-break text
// that width would be the size of the widest caracter in the text. We need to make the proposed size
// unbounded.
// This is the same as what Label does.
if( proposedSize.Width == 1 ) {
proposedSize.Width = 0;
}
if( proposedSize.Height == 1 ) {
proposedSize.Height = 0;
}
return base.GetPreferredSize( proposedSize );
}
internal override Size GetPreferredSizeCore(Size proposedConstraints) {
Size prefSize = Adapter.GetPreferredSizeCore(proposedConstraints);
return LayoutUtils.UnionSizes(prefSize + Padding.Size, MinimumSize);
}
private ButtonBaseAdapter _adapter = null;
private FlatStyle _cachedAdapterType;
internal ButtonBaseAdapter Adapter {
get {
if(_adapter == null || FlatStyle != _cachedAdapterType) {
switch (FlatStyle) {
case FlatStyle.Standard:
_adapter = CreateStandardAdapter();
break;
case FlatStyle.Popup:
_adapter = CreatePopupAdapter();
break;
case FlatStyle.Flat:
_adapter = CreateFlatAdapter();;
break;
default:
Debug.Fail("Unsupported FlatStyle: '" + FlatStyle + '"');
break;
}
_cachedAdapterType = FlatStyle;
}
return _adapter;
}
}
internal virtual ButtonBaseAdapter CreateFlatAdapter() {
Debug.Fail("Derived classes need to provide a meaningful implementation.");
return null;
}
internal virtual ButtonBaseAdapter CreatePopupAdapter() {
Debug.Fail("Derived classes need to provide a meaningful implementation.");
return null;
}
internal virtual ButtonBaseAdapter CreateStandardAdapter() {
Debug.Fail("Derived classes need to provide a meaningful implementation.");
return null;
}
internal virtual StringFormat CreateStringFormat() {
if( Adapter == null ) {
Debug.Fail("Adapter not expected to be null at this point");
return new StringFormat();
}
return Adapter.CreateStringFormat();
}
internal virtual TextFormatFlags CreateTextFormatFlags() {
if( Adapter == null ) {
Debug.Fail( "Adapter not expected to be null at this point" );
return TextFormatFlags.Default;
}
return Adapter.CreateTextFormatFlags();
}
private void OnFrameChanged(object o, EventArgs e) {
if (Disposing || IsDisposed) {
return;
}
if (IsHandleCreated && InvokeRequired) {
BeginInvoke(new EventHandler(this.OnFrameChanged), new object[]{o,e});
return;
}
if (IsWindowObscured) {
StopAnimate();
return;
}
Invalidate();
}
///
/// [To be supplied.]
///
protected override void OnEnabledChanged(EventArgs e) {
base.OnEnabledChanged(e);
Animate();
if (!Enabled) {
// disabled button is always "up"
SetFlag(FlagMouseDown, false);
SetFlag(FlagMouseOver, false);
Invalidate();
}
}
///
/// [To be supplied.]
///
protected override void OnTextChanged(EventArgs e) {
using(LayoutTransaction.CreateTransactionIf(AutoSize, ParentInternal, this, PropertyNames.Text)) {
base.OnTextChanged(e);
Invalidate();
}
}
///
///
/// Raises the
///
protected override void OnKeyDown(KeyEventArgs kevent) {
Debug.Assert(Enabled, "ButtonBase.OnKeyDown should not be called if the button is disabled");
if (kevent.KeyData == Keys.Space) {
if (!GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, true);
// It looks like none of the "SPACE" key downs generate the BM_SETSTATE.
// This causes to not draw the focus rectangle inside the button and also
// not paint the button as "un-depressed".
//
if(!OwnerDraw) {
SendMessage(NativeMethods.BM_SETSTATE, 1, 0);
}
Invalidate(DownChangeRectangle);
}
kevent.Handled = true;
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnKeyDown(kevent);
}
///
///
/// Raises the
///
protected override void OnKeyUp(KeyEventArgs kevent) {
if (GetFlag(FlagMouseDown) && !ValidationCancelled) {
if (OwnerDraw) {
ResetFlagsandPaint();
}
else {
SetFlag(FlagMousePressed, false);
SetFlag(FlagMouseDown, false);
SendMessage(NativeMethods.BM_SETSTATE, 0, 0);
}
// VSWhidbey 498398: Breaking change: specifically filter out Keys.Enter and Keys.Space as the only
// two keystrokes to execute OnClick.
if (kevent.KeyCode == Keys.Enter || kevent.KeyCode == Keys.Space) {
OnClick(EventArgs.Empty);
}
kevent.Handled = true;
}
// call base last, so if it invokes any listeners that disable the button, we
// don't have to recheck
base.OnKeyUp(kevent);
}
///
///
/// Raises the
///
protected override void OnPaint(PaintEventArgs pevent) {
if( AutoEllipsis ){
Size preferredSize = PreferredSize;
ShowToolTip = (this.ClientRectangle.Width < preferredSize.Width || this.ClientRectangle.Height < preferredSize.Height);
}
else {
ShowToolTip = false;
}
if (GetStyle(ControlStyles.UserPaint)) {
Animate();
ImageAnimator.UpdateFrames();
PaintControl(pevent);
}
base.OnPaint(pevent);
}
///
/// [To be supplied.]
///
protected override void OnParentChanged(EventArgs e) {
base.OnParentChanged(e);
Animate();
}
///
/// [To be supplied.]
///
protected override void OnVisibleChanged(EventArgs e) {
base.OnVisibleChanged(e);
Animate();
}
private void ResetImage() {
Image = null;
}
private void SetFlag(int flag, bool value) {
bool oldValue = ((state & flag) != 0);
if (value) {
state |= flag;
}
else {
state &= ~flag;
}
if (OwnerDraw && (flag & FlagMouseDown) != 0 && value != oldValue) {
AccessibilityNotifyClients(AccessibleEvents.StateChange, -1);
}
}
private bool ShouldSerializeImage() {
return image != null;
}
private void UpdateOwnerDraw() {
if (OwnerDraw != GetStyle(ControlStyles.UserPaint)) {
SetStyle(ControlStyles.UserMouse | ControlStyles.UserPaint, OwnerDraw);
RecreateHandle();
}
}
///
/// Determines whether to use compatible text rendering engine (GDI+) or not (GDI).
///
[
DefaultValue(false),
SRCategory(SR.CatBehavior),
SRDescription(SR.UseCompatibleTextRenderingDescr)
]
public bool UseCompatibleTextRendering {
get{
return base.UseCompatibleTextRenderingInt;
}
set{
base.UseCompatibleTextRenderingInt = value;
}
}
///
/// Determines whether the control supports rendering text using GDI+ and GDI.
/// This is provided for container controls to iterate through its children to set UseCompatibleTextRendering to the same
/// value if the child control supports it.
///
internal override bool SupportsUseCompatibleTextRendering {
get {
return true;
}
}
///
/// [To be supplied.]
///
[SecurityPermission(SecurityAction.LinkDemand, Flags=SecurityPermissionFlag.UnmanagedCode)]
protected override void WndProc(ref Message m) {
switch (m.Msg) {
// NDPWhidbey 28043 -- we don't respect this because the code below eats BM_SETSTATE.
// so we just invoke the click.
//
case NativeMethods.BM_CLICK:
if (this is IButtonControl) {
((IButtonControl)this).PerformClick();
}
else {
OnClick(EventArgs.Empty);
}
return;
}
if (OwnerDraw) {
switch (m.Msg) {
case NativeMethods.BM_SETSTATE:
// Ignore BM_SETSTATE -- Windows gets confused and paints
// things, even though we are ownerdraw. See ASURT 38669.
break;
case NativeMethods.WM_KILLFOCUS:
case NativeMethods.WM_CANCELMODE:
case NativeMethods.WM_CAPTURECHANGED:
if (!GetFlag(FlagInButtonUp) && GetFlag(FlagMousePressed)) {
SetFlag(FlagMousePressed, false);
if (GetFlag(FlagMouseDown)) {
SetFlag(FlagMouseDown, false);
Invalidate(DownChangeRectangle);
}
}
base.WndProc(ref m);
break;
case NativeMethods.WM_LBUTTONUP:
case NativeMethods.WM_MBUTTONUP:
case NativeMethods.WM_RBUTTONUP:
try {
SetFlag(FlagInButtonUp, true);
base.WndProc(ref m);
}
finally {
SetFlag(FlagInButtonUp, false);
}
break;
default:
base.WndProc(ref m);
break;
}
}
else {
switch (m.Msg) {
case NativeMethods.WM_REFLECT + NativeMethods.WM_COMMAND:
if (NativeMethods.Util.HIWORD(m.WParam) == NativeMethods.BN_CLICKED && !ValidationCancelled) {
OnClick(EventArgs.Empty);
}
break;
default:
base.WndProc(ref m);
break;
}
}
}
///
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- GeometryGroup.cs
- ObjectNavigationPropertyMapping.cs
- XmlSchemaComplexContentExtension.cs
- TableCell.cs
- ContentFilePart.cs
- WindowsStatusBar.cs
- ObjectStorage.cs
- HttpClientCertificate.cs
- XamlSerializationHelper.cs
- OutputWindow.cs
- XmlNodeList.cs
- CheckBoxDesigner.cs
- CatalogUtil.cs
- SqlLiftIndependentRowExpressions.cs
- FixedSOMTableCell.cs
- QueryCreatedEventArgs.cs
- CrossSiteScriptingValidation.cs
- RoleService.cs
- QualifiedCellIdBoolean.cs
- SafeBitVector32.cs
- unsafeIndexingFilterStream.cs
- DoubleStorage.cs
- XmlSchemaSimpleTypeRestriction.cs
- UnionExpr.cs
- PointKeyFrameCollection.cs
- GlyphingCache.cs
- HashCodeCombiner.cs
- GridViewRowPresenter.cs
- ToolbarAUtomationPeer.cs
- PageCatalogPart.cs
- EventLogReader.cs
- ConstructorExpr.cs
- SoapTypeAttribute.cs
- UmAlQuraCalendar.cs
- DataServiceRequestException.cs
- SnapLine.cs
- webeventbuffer.cs
- FeatureAttribute.cs
- AutoResizedEvent.cs
- ChannelServices.cs
- WebDisplayNameAttribute.cs
- HttpBufferlessInputStream.cs
- Button.cs
- Array.cs
- SqlDataSourceView.cs
- ToolStripItemEventArgs.cs
- DrawingBrush.cs
- WebServiceData.cs
- OpCopier.cs
- CompleteWizardStep.cs
- ImageSourceValueSerializer.cs
- PeerTransportSecuritySettings.cs
- RequestCacheManager.cs
- HotSpot.cs
- SynchronizedCollection.cs
- MemberAssignment.cs
- QueuePathDialog.cs
- DbQueryCommandTree.cs
- SafeHandle.cs
- ObjectPersistData.cs
- DataBindingExpressionBuilder.cs
- SoapInteropTypes.cs
- GridViewDesigner.cs
- AppDomainInstanceProvider.cs
- BrowserCapabilitiesCompiler.cs
- Nullable.cs
- TextModifier.cs
- BinaryExpression.cs
- SqlRecordBuffer.cs
- XmlWellformedWriterHelpers.cs
- DataBoundControl.cs
- GridItem.cs
- CompositeControl.cs
- FormViewDeletedEventArgs.cs
- TextElementAutomationPeer.cs
- CreateUserWizard.cs
- WebPartsPersonalization.cs
- UriParserTemplates.cs
- PersonalizationStateQuery.cs
- ClassicBorderDecorator.cs
- FileSystemInfo.cs
- AssemblyLoader.cs
- TextRunCache.cs
- XamlTemplateSerializer.cs
- KeyPullup.cs
- Attribute.cs
- Image.cs
- DataListComponentEditor.cs
- ToolStripRenderEventArgs.cs
- RTLAwareMessageBox.cs
- Clipboard.cs
- RegexParser.cs
- WebPartDescriptionCollection.cs
- NonVisualControlAttribute.cs
- RelatedImageListAttribute.cs
- CodeAttributeDeclaration.cs
- TextAutomationPeer.cs
- OdbcRowUpdatingEvent.cs
- GestureRecognitionResult.cs
- BoundConstants.cs