DrawListViewItemEventArgs.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / WinForms / Managed / System / WinForms / DrawListViewItemEventArgs.cs / 1 / DrawListViewItemEventArgs.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Windows.Forms { 
 
    using System.Diagnostics;
    using System.Diagnostics.CodeAnalysis; 
    using System;
    using System.ComponentModel;
    using System.Drawing;
    using System.Windows.Forms.Internal; 
    using Microsoft.Win32;
    using System.Windows.Forms.VisualStyles; 
 
    /// 
    ///  
    ///     This class contains the information a user needs to paint ListView items.
    /// 
    public class DrawListViewItemEventArgs : EventArgs {
 
        private readonly Graphics graphics;
        private readonly ListViewItem item; 
        private readonly Rectangle bounds; 
        private readonly int itemIndex;
        private readonly ListViewItemStates state; 
        private bool drawDefault;

        /// 
        ///  
        ///     Creates a new DrawListViewItemEventArgs with the given parameters.
        ///  
        public DrawListViewItemEventArgs(Graphics graphics, ListViewItem item, Rectangle bounds, 
 										int itemIndex, ListViewItemStates state)
        { 
            this.graphics = graphics;
            this.item = item;
            this.bounds = bounds;
            this.itemIndex = itemIndex; 
            this.state = state;
            this.drawDefault = false; 
        } 

        ///  
        /// 
        ///     Causes the item do be drawn by the system instead of owner drawn.
        /// 
        public bool DrawDefault { 
            get  {
                return drawDefault; 
            } 
            set {
                drawDefault = value; 
            }
        }

        ///  
        /// 
        ///     Graphics object with which painting should be done. 
        ///  
        public Graphics Graphics
        { 
            get
            {
                return graphics;
            } 
        }
	 
        ///  
        /// 
        ///     The item to be painted. 
        /// 
        public ListViewItem Item
        {
            get 
            {
                return item; 
            } 
        }
	 
        /// 
        /// 
        ///     The rectangle outlining the area in which the painting should be done.
        ///  
        public Rectangle Bounds
        { 
            get 
            {
                return bounds; 
            }
        }

 
        /// 
        ///  
        ///     The index of the item that should be painted. 
        /// 
        public int ItemIndex 
        {
            get
            {
                return itemIndex; 
            }
        } 
 
        /// 
        ///  
        ///     Miscellaneous state information.
        /// 
        public ListViewItemStates State
        { 
            get
            { 
                return state; 
            }
        } 

        /// 
        /// 
        ///     Draws the item's background. 
        /// 
        public void DrawBackground() 
        { 
            Brush backBrush = new SolidBrush(item.BackColor);
            Graphics.FillRectangle(backBrush, bounds); 
            backBrush.Dispose();
        }

		///  
        /// 
        ///     Draws a focus rectangle in the given bounds, if the item is focused. In Details View, if FullRowSelect is 
        ///     true, the rectangle is drawn around the whole item, else around the first sub-item's text area. 
        /// 
        public void DrawFocusRectangle() 
        {
            if ((state & ListViewItemStates.Focused) == ListViewItemStates.Focused) {

                Rectangle focusBounds = bounds; 
                ControlPaint.DrawFocusRectangle(graphics, UpdateBounds(focusBounds, false /*drawText*/), item.ForeColor, item.BackColor);
            } 
        } 

        ///  
        /// 
        ///     Draws the item's text (overloaded) - useful only when View != View.Details
        /// 
        public void DrawText() 
        {
            DrawText(TextFormatFlags.Left); 
        } 
 	
        ///  
        /// 
        ///     Draws the item's text (overloaded) - useful only when View != View.Details - takes a TextFormatFlags argument.
        /// 
        public void DrawText(TextFormatFlags flags) 
        {
            TextRenderer.DrawText(graphics, item.Text, item.Font, UpdateBounds(bounds, true /*drawText*/), item.ForeColor, flags); 
        } 

        private Rectangle UpdateBounds(Rectangle originalBounds, bool drawText) { 
            Rectangle resultBounds = originalBounds;
            if (item.ListView.View == View.Details) {

                // Note: this logic will compute the bounds so they align w/ the system drawn bounds only 
                // for the default font.
                if (!item.ListView.FullRowSelect && item.SubItems.Count > 0) { 
                    ListViewItem.ListViewSubItem subItem = item.SubItems[0]; 
                    Size textSize = TextRenderer.MeasureText(subItem.Text, subItem.Font);
 
                    resultBounds = new Rectangle(originalBounds.X, originalBounds.Y, textSize.Width, textSize.Height);

                    // Add some padding so we paint like the system control paints.
                    resultBounds.X += 4; 
                    resultBounds.Width ++;
                } 
                else 
                {
                    resultBounds.X +=4; 
                    resultBounds.Width -= 4;
                }

                if (drawText) { 
                    resultBounds.X --;
                } 
            } 

            return resultBounds; 
        }
    }
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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