Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / SplitContainerDesigner.cs / 2 / SplitContainerDesigner.cs
//------------------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//-----------------------------------------------------------------------------
/*
*/
[assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Scope="member", Target="System.Windows.Forms.Design.SplitContainerDesigner..ctor()")]
namespace System.Windows.Forms.Design {
using System.Design;
using System.Runtime.InteropServices;
using System.ComponentModel;
using System.Collections;
using System.Diagnostics;
using System.Diagnostics.CodeAnalysis;
using System;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Design;
using System.Windows.Forms;
using Microsoft.Win32;
using System.Windows.Forms.Design.Behavior;
///
/// This class handles all design time behavior for the SplitContainer class. This
/// draws a visible border on the splitter if it doesn't have a border so the
/// user knows where the boundaries of the splitter lie.
///
internal class SplitContainerDesigner : ParentControlDesigner {
private const string panel1Name = "Panel1";
private const string panel2Name = "Panel2";
//
// The Desinger host ....
//
IDesignerHost designerHost;
//
// The Control for which this is the Designer...
//
SplitContainer splitContainer;
//
// SplitterPanels....
//
SplitterPanel selectedPanel;
private static int numberOfSplitterPanels = 2;
SplitterPanel splitterPanel1, splitterPanel2;
//
// The Container Shouldnt Show any GRIDs in the Splitter Region ...
//
private bool disableDrawGrid = false;
//
//
//
private bool disabledGlyphs = false; //did we disable glyphs as part of the user moving the splitter
//
// Hittest Boolean...
//
private bool splitContainerSelected = false;
// To deal with checkout cancelation
private int initialSplitterDist = 0;
private bool splitterDistanceException = false;
/////////////////////////////////////////////////////////////////////////////////////////////////////////////
// PROPERTIES .. //
/////////////////////////////////////////////////////////////////////////////////////////////////////////////
///
/// SplitContainer designer action list property. Gets the design-time supported actions on the control.
///
public override DesignerActionListCollection ActionLists
{
get
{
DesignerActionListCollection actions = new DesignerActionListCollection();
//heres our action list we'll use
OrientationActionList orientationAction = new OrientationActionList(this);
actions.Add(orientationAction);
return actions;
}
}
///
/// The SplitContainerDesigner will not re-parent any controls that are within it's lasso at
/// creation time.
///
protected override bool AllowControlLasso {
get {
return false;
}
}
///
/// Override to Turn DrawGrid to False.
///
protected override bool DrawGrid {
get {
if (disableDrawGrid) {
return false;
}
return base.DrawGrid;
}
}
///
/// This property is used by deriving classes to determine if it returns the control being designed or some other Container ...
/// while adding a component to it.
/// e.g: When SplitContainer is selected and a component is being added ... the SplitContainer designer would return a
/// SelectedPanel as the ParentControl for all the items being added rather than itself.
///
protected override Control GetParentForComponent(IComponent component) {
return splitterPanel1;
}
///
/// Returns a list of SnapLine objects representing interesting
/// alignment points for this control. These SnapLines are used
/// to assist in the positioning of the control on a parent's
/// surface.
///
public override IList SnapLines {
get {
// We don't want padding snaplines, so call directly to the internal method.
ArrayList snapLines = base.SnapLinesInternal() as ArrayList;
return snapLines;
}
}
///
/// Returns the number of internal control designers in the SplitContainerDesigner. An internal control
/// is a control that is not in the IDesignerHost.Container.Components collection.
/// We use this to get SnapLines for the internal control designers.
///
public override int NumberOfInternalControlDesigners() {
return numberOfSplitterPanels;
}
///
/// Returns the internal control designer with the specified index in the ControlDesigner.
///
/// internalControlIndex is zero-based.
///
public override ControlDesigner InternalControlDesigner(int internalControlIndex) {
SplitterPanel panel;
switch (internalControlIndex) {
case 0:
panel = splitterPanel1;
break;
case 1:
panel = splitterPanel2;
break;
default:
return null;
}
return(designerHost.GetDesigner(panel) as ControlDesigner);
}
///
/// This is the internal Property which stores the currently selected panel.If the
/// user double clicks a controls it is placed in the SelectedPanel.
///
internal SplitterPanel Selected {
get {
return selectedPanel;
}
set {
if (selectedPanel != null) {
SplitterPanelDesigner panelDesigner1 = (SplitterPanelDesigner)designerHost.GetDesigner(selectedPanel);
panelDesigner1.Selected = false;
}
if (value != null)
{
SplitterPanelDesigner panelDesigner = (SplitterPanelDesigner)designerHost.GetDesigner(value);
selectedPanel = value;
panelDesigner.Selected = true;
}
else { //value == null
if (selectedPanel != null)
{
SplitterPanelDesigner panelDesigner = (SplitterPanelDesigner)designerHost.GetDesigner(selectedPanel);
selectedPanel = null;
panelDesigner.Selected = false;
}
}
}
}
///
/// The ToolStripItems are the associated components.
/// We want those to come with in any cut, copy opreations.
///
public override System.Collections.ICollection AssociatedComponents
{
get
{
ArrayList components = new ArrayList();
foreach (SplitterPanel panel in splitContainer.Controls) {
foreach(Control c in panel.Controls)
{
components.Add(c);
}
}
return (ICollection)components;
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// End Properties //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Start Overrides //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
protected override void OnDragEnter(DragEventArgs de) {
de.Effect = DragDropEffects.None;
}
///
/// This is the worker method of all CreateTool methods. It is the only one
/// that can be overridden.
///
protected override IComponent[] CreateToolCore(ToolboxItem tool, int x, int y, int width, int height, bool hasLocation, bool hasSize) {
// We invoke the drag drop handler for this. This implementation is shared between all designers that
// create components.
//
if (this.Selected == null)
{
this.Selected = splitterPanel1;
}
SplitterPanelDesigner selectedPanelDesigner = (SplitterPanelDesigner)designerHost.GetDesigner(this.Selected);
InvokeCreateTool(selectedPanelDesigner, tool);
//return Dummy null as the InvokeCreateTool of SPliiterPanel would do the necessary hookups.
return null;
}
///
/// Disposes of this designer.
///
protected override void Dispose(bool disposing) {
ISelectionService svc = (ISelectionService)GetService(typeof(ISelectionService));
if (svc != null) {
svc.SelectionChanged -= new EventHandler(this.OnSelectionChanged);
}
splitContainer.MouseDown -= new MouseEventHandler(this.OnSplitContainer);
splitContainer.SplitterMoved -= new SplitterEventHandler(this.OnSplitterMoved);
splitContainer.SplitterMoving -= new SplitterCancelEventHandler(this.OnSplitterMoving);
splitContainer.DoubleClick -= new EventHandler(this.OnSplitContainerDoubleClick);
base.Dispose(disposing);
}
///
///
protected override bool GetHitTest(Point point) {
if (!(InheritanceAttribute == InheritanceAttribute.InheritedReadOnly)) {
return splitContainerSelected;
}
return false;
}
///
/// Returns a 'BodyGlyph' representing the bounds of this control.
/// The BodyGlyph is responsible for hit testing the related CtrlDes
/// and forwarding messages directly to the designer.
///
protected override ControlBodyGlyph GetControlGlyph(GlyphSelectionType selectionType) {
ControlBodyGlyph bodyGlyph = null;
SelectionManager selMgr = (SelectionManager)GetService(typeof(SelectionManager));
if (selMgr != null)
{
Rectangle translatedBounds = BehaviorService.ControlRectInAdornerWindow(splitterPanel1);
SplitterPanelDesigner panelDesigner = designerHost.GetDesigner(splitterPanel1) as SplitterPanelDesigner;
OnSetCursor();
if (panelDesigner != null)
{
//create our glyph, and set its cursor appropriately
bodyGlyph = new ControlBodyGlyph(translatedBounds, Cursor.Current, splitterPanel1, panelDesigner);
selMgr.BodyGlyphAdorner.Glyphs.Add(bodyGlyph);
}
translatedBounds = BehaviorService.ControlRectInAdornerWindow(splitterPanel2);
panelDesigner = designerHost.GetDesigner(splitterPanel2) as SplitterPanelDesigner;
if (panelDesigner != null)
{
//create our glyph, and set its cursor appropriately
bodyGlyph = new ControlBodyGlyph(translatedBounds, Cursor.Current, splitterPanel2, panelDesigner);
selMgr.BodyGlyphAdorner.Glyphs.Add(bodyGlyph);
}
}
return base.GetControlGlyph(selectionType);
}
///
/// Called by the host when we're first initialized.
///
public override void Initialize(IComponent component) {
base.Initialize(component);
AutoResizeHandles = true;
splitContainer = component as SplitContainer;
Debug.Assert(splitContainer != null, "Component must be a non-null SplitContainer, it is a: "+component.GetType().FullName);
splitterPanel1 = splitContainer.Panel1;
splitterPanel2 = splitContainer.Panel2;
EnableDesignMode(splitContainer.Panel1, panel1Name);
EnableDesignMode(splitContainer.Panel2, panel2Name);
designerHost = (IDesignerHost)component.Site.GetService(typeof(IDesignerHost));
if (selectedPanel == null) {
this.Selected = splitterPanel1;
}
splitContainer.MouseDown += new MouseEventHandler(this.OnSplitContainer);
splitContainer.SplitterMoved += new SplitterEventHandler(this.OnSplitterMoved);
splitContainer.SplitterMoving += new System.Windows.Forms.SplitterCancelEventHandler(OnSplitterMoving);
splitContainer.DoubleClick += new EventHandler(this.OnSplitContainerDoubleClick);
ISelectionService svc = (ISelectionService)GetService(typeof(ISelectionService));
if (svc != null) {
svc.SelectionChanged += new EventHandler(this.OnSelectionChanged);
}
}
///
/// Overrides our base class. We dont draw the Grids for this Control. Also we Select the Panel1 if nothing is
/// still Selected.
///
protected override void OnPaintAdornments(PaintEventArgs pe) {
try {
this.disableDrawGrid = true;
// we don't want to do this for the tab control designer
// because you can't drag anything onto it anyway.
// so we will always return false for draw grid.
base.OnPaintAdornments(pe);
}
finally {
this.disableDrawGrid = false;
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// End Overrides //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Private Implementations //
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///
/// Determines if the this designer can parent to the specified desinger --
/// generally this means if the control for this designer can parent the
/// given ControlDesigner's designer.
///
public override bool CanParent(Control control) {
return false;
}
///
/// Called when the user clicks the SplitContainer.
///
private void OnSplitContainer(object sender, MouseEventArgs e) {
ISelectionService svc = (ISelectionService)GetService(typeof(ISelectionService));
svc.SetSelectedComponents(new Object[] {(Control)});
}
///
/// Called when the user clicks the SplitContainer.
///
// Standard 'catch all - rethrow critical' exception pattern
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
[SuppressMessage("Microsoft.Security", "CA2102:CatchNonClsCompliantExceptionsInGeneralHandlers")]
private void OnSplitContainerDoubleClick(object sender, EventArgs e) {
if (splitContainerSelected)
{
try {
DoDefaultAction();
}
catch (Exception ex) {
if (ClientUtils.IsCriticalException(ex)) {
throw;
}
else
{
DisplayError(ex);
}
}
}
}
///
/// Called when the user Moves the splitter in the Design Mode.
///
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes")]
[SuppressMessage("Microsoft.Security", "CA2102:CatchNonClsCompliantExceptionsInGeneralHandlers")]
private void OnSplitterMoved(object sender, SplitterEventArgs e) {
if (InheritanceAttribute == InheritanceAttribute.InheritedReadOnly || splitterDistanceException) {
return;
}
try
{
base.RaiseComponentChanging(TypeDescriptor.GetProperties(splitContainer)["SplitterDistance"]);
base.RaiseComponentChanged(TypeDescriptor.GetProperties(splitContainer)["SplitterDistance"], null, null);
//enable all adorners except for bodyglyph adorner
//
//but only if we turned off the adorners
if (disabledGlyphs) {
foreach (Adorner a in BehaviorService.Adorners ) {
a.Enabled = true;
}
//Refresh the All Selection Glyphs
SelectionManager selMgr = (SelectionManager)GetService(typeof(SelectionManager));
if (selMgr != null)
{
selMgr.Refresh();
}
disabledGlyphs = false;
}
}
catch (System.InvalidOperationException ex) {
IUIService uiService = (IUIService) this.Component.Site.GetService(typeof(IUIService));
uiService.ShowError(ex.Message);
}
catch (CheckoutException checkoutException) {
if (checkoutException == CheckoutException.Canceled) {
try {
splitterDistanceException = true;
splitContainer.SplitterDistance = initialSplitterDist;
}
finally {
splitterDistanceException = false;
}
}
else
throw;
}
}
///
/// Called when the user Moves the splitter in the Design Mode.
///
private void OnSplitterMoving(object sender, SplitterCancelEventArgs e)
{
initialSplitterDist = splitContainer.SplitterDistance;
if (InheritanceAttribute == InheritanceAttribute.InheritedReadOnly) {
return;
}
//We are moving the splitter via the mouse or key and not as a result of resize of
//the container itself (through the resizebehavior::onmousemove)
disabledGlyphs = true;
//find our bodyglyph adorner offered by the behavior service
//we don't want to disable the transparent body glyphs
//
Adorner bodyGlyphAdorner = null;
SelectionManager selMgr = (SelectionManager)GetService(typeof(SelectionManager));
if (selMgr != null) {
bodyGlyphAdorner = selMgr.BodyGlyphAdorner;
}
//disable all adorners except for bodyglyph adorner
//
foreach (Adorner a in BehaviorService.Adorners) {
if (bodyGlyphAdorner != null && a.Equals(bodyGlyphAdorner)) {
continue;
}
a.Enabled = false;
}
//From the BodyAdorners Remove all Glyphs Except the ones for SplitterPanels.
ArrayList glyphsToRemove = new ArrayList();
foreach (ControlBodyGlyph g in bodyGlyphAdorner.Glyphs) {
if (!(g.RelatedComponent is SplitterPanel))
{
glyphsToRemove.Add(g);
}
}
foreach (Glyph g in glyphsToRemove) {
bodyGlyphAdorner.Glyphs.Remove(g);
}
}
///
/// Called when the current selection changes. Here we check to
/// see if the newly selected component is one of our Panels. If it
/// is, we make sure that the tab is the currently visible tab.
///
private void OnSelectionChanged(Object sender, EventArgs e) {
ISelectionService svc = (ISelectionService)GetService( typeof(ISelectionService) );
splitContainerSelected = false;
if (svc != null) {
ICollection selComponents = svc.GetSelectedComponents();
foreach(object comp in selComponents) {
SplitterPanel panel = CheckIfPanelSelected(comp);
if (panel != null && panel.Parent == splitContainer) {
splitContainerSelected = false;
this.Selected = panel;
break;
}
else {
this.Selected = null;
}
if (comp == splitContainer) {
splitContainerSelected = true;//this is for HitTest purposes
break;
}
}
}
}
///
/// Given a component, this retrieves the splitter panel that it's parented to, or
/// null if it's not parented to any splitter panel.
///
private static SplitterPanel CheckIfPanelSelected(object comp) {
return comp as SplitterPanel;
}
///
/// Called when one of the child splitter panels receives a MouseHover message. Here,
/// we will simply call the parenting SplitContainer.OnMouseHover so we can get a
/// grab handle for moving this thing around.
///
internal void SplitterPanelHover() {
this.OnMouseHover();
}
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Private Implementation //
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////
///
/// This class is used to provide the horz or vert splitter orientation
/// action items.
///
private class OrientationActionList : DesignerActionList {
private string actionName;
private SplitContainerDesigner owner;
private Component ownerComponent;
///
/// Caches off the localized name of our action
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
public OrientationActionList(SplitContainerDesigner owner)
: base(owner.Component)
{
this.owner = owner;
this.ownerComponent = owner.Component as Component;
//Set the initial ActionName
if (ownerComponent != null)
{
PropertyDescriptor orientationProp = TypeDescriptor.GetProperties(ownerComponent)["Orientation"];
if (orientationProp != null) {
bool needsVertical = ((Orientation)orientationProp.GetValue(ownerComponent)) == Orientation.Horizontal;
actionName = needsVertical ? SR.GetString(SR.DesignerShortcutVerticalOrientation) :
SR.GetString(SR.DesignerShortcutHorizontalOrientation);
}
}
}
///
/// Called when our SplitterOrientation DesignerActions are clicked. Here, we set the
/// control's orientation appropriately (either Horizontal or Vertical).
///
[SuppressMessage("Microsoft.Performance", "CA1808:AvoidCallsThatBoxValueTypes")]
private void OnOrientationActionClick(object sender, EventArgs e)
{
DesignerVerb verb = sender as DesignerVerb;
if (verb != null) {
Orientation orientation = verb.Text.Equals(SR.GetString(SR.DesignerShortcutHorizontalOrientation)) ? Orientation.Horizontal : Orientation.Vertical;
//switch the text of the orientation action from vertical to horizontal or visa-versa
actionName = (orientation == Orientation.Horizontal) ?
SR.GetString(SR.DesignerShortcutVerticalOrientation) :
SR.GetString(SR.DesignerShortcutHorizontalOrientation);
//get the prop and actually modify the orientation
PropertyDescriptor orientationProp = TypeDescriptor.GetProperties(ownerComponent)["Orientation"];
if (orientationProp != null && ((Orientation)orientationProp.GetValue(ownerComponent)) != orientation) {
orientationProp.SetValue(ownerComponent, orientation);
}
DesignerActionUIService actionUIService = (DesignerActionUIService)owner.GetService(typeof(DesignerActionUIService));
if (actionUIService != null)
{
actionUIService.Refresh(ownerComponent);
}
}
}
///
/// Returns our undock or dock item
///
public override DesignerActionItemCollection GetSortedActionItems() {
DesignerActionItemCollection items = new DesignerActionItemCollection();
items.Add(new DesignerActionVerbItem(new DesignerVerb(actionName, this.OnOrientationActionClick)));
return items;
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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