Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Designer / WinForms / System / WinForms / Design / SplitterDesigner.cs / 1 / SplitterDesigner.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- /* */ [assembly: System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1811:AvoidUncalledPrivateCode", Scope="member", Target="System.Windows.Forms.Design.SplitterDesigner..ctor()")] namespace System.Windows.Forms.Design { using System.Design; using System.ComponentModel; using System.Diagnostics; using System.Drawing.Drawing2D; using System; using System.Drawing; using System.Windows.Forms; using Microsoft.Win32; ////// /// This class handles all design time behavior for the splitter 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 SplitterDesigner : ControlDesigner { public SplitterDesigner() { AutoResizeHandles = true; } ////// /// This draws a nice border around our panel. We need /// this because the panel can have no border and you can't /// tell where it is. /// ///private void DrawBorder(Graphics graphics) { Control ctl = Control; Rectangle rc = ctl.ClientRectangle; Color penColor; // Black or white pen? Depends on the color of the control. // if (ctl.BackColor.GetBrightness() < .5) { penColor = Color.White; } else { penColor = Color.Black; } using (Pen pen = new Pen(penColor)) { pen.DashStyle = DashStyle.Dash; rc.Width --; rc.Height--; graphics.DrawRectangle(pen, rc); } } /// /// /// Overrides our base class. Here we check to see if there /// is no border on the panel. If not, we draw one so that /// the panel shape is visible at design time. /// protected override void OnPaintAdornments(PaintEventArgs pe) { Splitter splitter = (Splitter)Component; base.OnPaintAdornments(pe); if (splitter.BorderStyle == BorderStyle.None) { DrawBorder(pe.Graphics); } } protected override void WndProc(ref Message m) { switch (m.Msg) { case NativeMethods.WM_WINDOWPOSCHANGED: // Really only care about window size changing Control source = (Control)Control; source.Invalidate(); break; } base.WndProc(ref m); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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