| public RectangleToClient ( Rectangle r ) : Rectangle | ||
| r | Rectangle | |
| return | Rectangle | |
} // end method Control
/// <summary>
/// Captures the specified area of the control or whats underneath
/// the control. If the argument flag client is true, only the client
/// area of the control is captured, otherwise the entire control is
/// captured. If the argument flag under is true, the capture area under
/// the control is captured, otherwise the specified area on the control
/// is captured.
/// </summary>
/// <param name="ctl">Control to capture</param>
/// <param name="client">If true capture only client area else entire control.</param>
/// <param name="under">If true capture specified area underneath the control else whats on the control.</param>
/// <returns>bitmap image of the control or whats underneath the control</returns>
public static Bitmap Control(System.Windows.Forms.Control ctl, bool client, bool under)
{
Bitmap bmp; // capture bitmap
Rectangle ctlR; // capture area rectangle in control coordinates
Rectangle scrR; // capture area rectangle in screen coordinates
// get capture rectangle in control
// coordinates and in screen coordinates
if (client) // if capturing client area
{
ctlR = ctl.ClientRectangle; // get rectangle in control coordinates
scrR = ctl.RectangleToScreen(ctlR); // get rectangle in screen coordinates
}
else // if capturing entire control
{
scrR = ctl.Bounds; // get rectangle in parent coordinates
if (ctl.Parent != null) // if parent exists
{
scrR = ctl.Parent.RectangleToScreen(scrR); // map to screen coordinates
}
ctlR = ctl.RectangleToClient(scrR); // get rectangle in control coordinates
}
// capture an area under the control
if (under) // if capture area is under control
{
bool prvV = ctl.Visible; // save control visibility
if (prvV) // if control visible
{
ctl.Visible = false; // make control invisible
Thread.Sleep(m_HDelay); // allow time for control to become invisible
// prior to image capture
}
// Capture the bitmap using desktop window handle and screen coordinates
// for the capture area. Note, the control window handle can NOT be used
// for capturing an area under the control.
IntPtr desktopHWND = USER32.GetDesktopWindow(); // get window handle for desktop
bmp = Window(desktopHWND, scrR); // get bitmap for capture area under control
if (ctl.Visible != prvV) // if control visibility was changed
{
ctl.Visible = prvV; // restore previous visibility
}
}
// capture an area on the control
else // if capture area not under control
{
// Capture the bitmap using control window handle and control coordinates
// for capture area.
bmp = Window(ctl.Handle, ctlR); // get bitmap using control window handle
}
return(bmp); // return requested bitmap
} // end method Control
public static Rectangle getVisibleRectangle(Control panel, Control insideControl)
{
Rectangle rect = panel.RectangleToScreen(panel.ClientRectangle);
while (panel != null)
{
rect = Rectangle.Intersect(rect, panel.RectangleToScreen(panel.ClientRectangle));
panel = panel.Parent;
}
rect = insideControl.RectangleToClient(rect);
return rect;
}
protected override void OnPaint(PaintEventArgs e)
{
// 禁用重绘事件，仅在设计器模式下启用
if (DesignMode || UseOwnPaint)
{
base.OnPaint(e);
Graphics g = e.Graphics;
g.Clear(this.BackColor);
if (Parent != null && this.BackColor == Color.Transparent)
{
//g.Clear(Parent.BackColor);
// 找到有背景图像的上级控件
Control parentThatOwnsBgImage = Parent;
Image bgImage = Parent.BackgroundImage;
if (parentThatOwnsBgImage.BackgroundImage == null && parentThatOwnsBgImage.BackColor == Color.Transparent)
{
while (parentThatOwnsBgImage != null)
{
parentThatOwnsBgImage = parentThatOwnsBgImage.Parent;
if (parentThatOwnsBgImage != null &&
parentThatOwnsBgImage.BackgroundImage != null)
{
bgImage = parentThatOwnsBgImage.BackgroundImage;
break;
}
}
}
if (bgImage != null)
{
// 算控件在上级控件（有背景图像的上级容器）中的位置，算得不对，需要修改
Rectangle boundsInParent = parentThatOwnsBgImage.RectangleToClient(this.ActualBounds);
g.DrawImage(bgImage, this.ClientRectangle, boundsInParent.X, boundsInParent.Y, this.Width, this.Height, GraphicsUnit.Pixel);
}
}
if (this.BackgroundImage != null)
{
g.DrawImage(this.BackgroundImage, 0, 0);
}
if (this.NormalImage != null)
{
g.DrawImage(this.NormalImage, this.ClientRectangle);
}
}
}
public static object CallControlRectangleToClient(Control c, object[] obj)
{
return c.RectangleToClient((Rectangle)obj[0]);
}
public static object CallControlRectangleToClient(Control c, object[] obj)
{
return(c.RectangleToClient((System.Drawing.Rectangle)obj[0]));
}
public void TestPublicMethods ()
{
// Public Methods that force Handle creation:
// - CreateControl ()
// - CreateGraphics ()
// - GetChildAtPoint ()
// - Invoke, BeginInvoke throws InvalidOperationException if Handle has not been created
// - PointToClient ()
// - PointToScreen ()
// - RectangleToClient ()
// - RectangleToScreen ()
Control c = new Control ();
c.BringToFront ();
Assert.IsFalse (c.IsHandleCreated, "A1");
c.Contains (new Control ());
Assert.IsFalse (c.IsHandleCreated, "A2");
c.CreateControl ();
Assert.IsTrue (c.IsHandleCreated, "A3");
c = new Control ();
Graphics g = c.CreateGraphics ();
g.Dispose ();
Assert.IsTrue (c.IsHandleCreated, "A4");
c = new Control ();
c.Dispose ();
Assert.IsFalse (c.IsHandleCreated, "A5");
c = new Control ();
//DragDropEffects d = c.DoDragDrop ("yo", DragDropEffects.None);
//Assert.IsFalse (c.IsHandleCreated, "A6");
//Assert.AreEqual (DragDropEffects.None, d, "A6b");
//Bitmap b = new Bitmap (100, 100);
//c.DrawToBitmap (b, new Rectangle (0, 0, 100, 100));
//Assert.IsFalse (c.IsHandleCreated, "A7");
//b.Dispose ();
c.FindForm ();
Assert.IsFalse (c.IsHandleCreated, "A8");
c.Focus ();
Assert.IsFalse (c.IsHandleCreated, "A9");
c.GetChildAtPoint (new Point (10, 10));
Assert.IsTrue (c.IsHandleCreated, "A10");
c.GetContainerControl ();
c = new Control ();
Assert.IsFalse (c.IsHandleCreated, "A11");
c.GetNextControl (new Control (), true);
Assert.IsFalse (c.IsHandleCreated, "A12");
#if NET_2_0
c.GetPreferredSize (Size.Empty);
Assert.IsFalse (c.IsHandleCreated, "A13");
#endif
c.Hide ();
Assert.IsFalse (c.IsHandleCreated, "A14");
c.Invalidate ();
Assert.IsFalse (c.IsHandleCreated, "A15");
//c.Invoke (new InvokeDelegate (InvokeMethod));
//Assert.IsFalse (c.IsHandleCreated, "A16");
c.PerformLayout ();
Assert.IsFalse (c.IsHandleCreated, "A17");
c.PointToClient (new Point (100, 100));
Assert.IsTrue (c.IsHandleCreated, "A18");
c = new Control ();
c.PointToScreen (new Point (100, 100));
Assert.IsTrue (c.IsHandleCreated, "A19");
c = new Control ();
//c.PreProcessControlMessage ???
//c.PreProcessMessage ???
c.RectangleToClient (new Rectangle (0, 0, 100, 100));
Assert.IsTrue (c.IsHandleCreated, "A20");
c = new Control ();
c.RectangleToScreen (new Rectangle (0, 0, 100, 100));
Assert.IsTrue (c.IsHandleCreated, "A21");
c = new Control ();
c.Refresh ();
Assert.IsFalse (c.IsHandleCreated, "A22");
c.ResetBackColor ();
Assert.IsFalse (c.IsHandleCreated, "A23");
c.ResetBindings ();
Assert.IsFalse (c.IsHandleCreated, "A24");
c.ResetCursor ();
Assert.IsFalse (c.IsHandleCreated, "A25");
c.ResetFont ();
Assert.IsFalse (c.IsHandleCreated, "A26");
c.ResetForeColor ();
Assert.IsFalse (c.IsHandleCreated, "A27");
c.ResetImeMode ();
Assert.IsFalse (c.IsHandleCreated, "A28");
c.ResetRightToLeft ();
Assert.IsFalse (c.IsHandleCreated, "A29");
c.ResetText ();
Assert.IsFalse (c.IsHandleCreated, "A30");
c.SuspendLayout ();
Assert.IsFalse (c.IsHandleCreated, "A31");
c.ResumeLayout ();
Assert.IsFalse (c.IsHandleCreated, "A32");
#if NET_2_0
c.Scale (new SizeF (1.5f, 1.5f));
Assert.IsFalse (c.IsHandleCreated, "A33");
#endif
c.Select ();
Assert.IsFalse (c.IsHandleCreated, "A34");
c.SelectNextControl (new Control (), true, true, true, true);
Assert.IsFalse (c.IsHandleCreated, "A35");
c.SetBounds (0, 0, 100, 100);
Assert.IsFalse (c.IsHandleCreated, "A36");
c.Update ();
Assert.IsFalse (c.IsHandleCreated, "A37");
}
/// <summary>
/// Refreshes the drawn rectangle.
/// </summary>
/// <param name="control">The control.</param>
/// <param name="endPoint">The end point.</param>
private void RefreshDrawnRectangle(Control control, Point endPoint)
{
var screenRectangle = new Rectangle(
Math.Min(this.startPoint.X, endPoint.X),
Math.Min(this.startPoint.Y, endPoint.Y),
Math.Abs(this.selectionRectangle.Width),
Math.Abs(this.selectionRectangle.Height));
this.drawnRectangle = control.RectangleToClient(screenRectangle);
}
