在客户端桌面区域内移动表单

我的目标是在用户通过鼠标移动时防止部分或全部隐藏。 例如,如果我的桌面分辨率为1024×768,则表格位置属性的坐标的最小值/最大值为“x / y”:0,1024 – form.width,0,768 – form.height。

我使用一些原生APi来完成所有这一切并且一切正常,但我经常注意到我的表单刷新(闪烁)(我正在管理form_move事件)。
似乎SuspendLayout方法不能正常工作,否则表单移动事件不会触发每个像素更改,但可能不止一个(请参阅下面的代码来实现我的意思)。

我的代码如下所示:

 private void Form1_Move(object sender, EventArgs e) { this.SuspendLayout(); // Desktop Resolution (API utility) int x = Desktop.GetXResolution(); int y = Desktop.GetYResolution(); // Taskbar Info (API utility) Taskbar tb = new Taskbar(); int minX = 0; int maxX = x - this.Width; int minY = 0; int maxY = y - this.Height; if (!tb.AutoHide) { if (tb.Position != TaskbarPosition.Unknown && !tb.Size.IsEmpty) { if (tb.Position == TaskbarPosition.Top) minY += tb.Size.Height; switch (tb.Position) { case TaskbarPosition.Top: minY = tb.Size.Height; break; case TaskbarPosition.Bottom: maxY -= tb.Size.Height; break; case TaskbarPosition.Left: minX = tb.Size.Width; break; case TaskbarPosition.Right: maxX -= tb.Size.Width; break; } } } // Restore X Position if (this.Location.X  maxX) this.Location = new Point(maxX, this.Location.Y); // Restore Y Poistion if (this.Location.Y  maxY) this.Location = new Point(this.Location.X, maxY); this.ResumeLayout(false); } 

正如我已经说过的,通常当我恢复Location属性时,我的winForm会闪烁。

任何建议将不胜感激。

Move完成后移动。 表单已移动,然后您将其移回。 无论如何它会闪烁。

相反,防止它首先移动:

 private const int WM_MOVING = 0x216; private void WriteTheRect(IntPtr dest, Rectangle rect) { System.Runtime.InteropServices.Marshal.WriteInt32(dest, 0, rect.Left); System.Runtime.InteropServices.Marshal.WriteInt32(dest, 4, rect.Top); System.Runtime.InteropServices.Marshal.WriteInt32(dest, 8, rect.Right); System.Runtime.InteropServices.Marshal.WriteInt32(dest, 12, rect.Bottom); } protected override void WndProc(ref Message m) { if (m.Msg == WM_MOVING) { // RECT structure pointed to by lParam: left, top, right, bottom Rectangle r = Rectangle.FromLTRB(System.Runtime.InteropServices.Marshal.ReadInt32(m.LParam, 0), System.Runtime.InteropServices.Marshal.ReadInt32(m.LParam, 4), System.Runtime.InteropServices.Marshal.ReadInt32(m.LParam, 8), System.Runtime.InteropServices.Marshal.ReadInt32(m.LParam, 12) ); Rectangle allowed = Rectangle.FromLTRB(0, 0, 1600, 900); if (r.Left <= allowed.Left || r.Top <= allowed.Top || r.Right >= allowed.Right || r.Bottom >= allowed.Bottom) { int offset_x = r.Left < allowed.Left ? (allowed.Left - r.Left) : (r.Right > allowed.Right ? (allowed.Right - r.Right) : (0)); int offset_y = r.Top < allowed.Top ? (allowed.Top - r.Top) : (r.Bottom > allowed.Bottom ? (allowed.Bottom - r.Bottom) : (0)); r.Offset(offset_x, offset_y); WriteTheRect(m.LParam, r); } } base.WndProc(ref m); } 

显然,用你想要的实际边界替换常量。