| using System; |
| using System.Collections.Generic; |
| using System.Text; |
| using System.Windows.Forms; |
| using System.Drawing; |
| using System.Drawing.Drawing2D; |
| using System.ComponentModel; |
|
|
| namespace WeifenLuo.WinFormsUI.Docking |
| { |
| partial class DockPanel |
| { |
| |
| |
| |
| |
| |
| |
| |
| private abstract class DragHandlerBase : NativeWindow, IMessageFilter |
| { |
| protected DragHandlerBase() |
| { |
| } |
|
|
| protected abstract Control DragControl |
| { |
| get; |
| } |
|
|
| private Point m_startMousePosition = Point.Empty; |
| protected Point StartMousePosition |
| { |
| get { return m_startMousePosition; } |
| private set { m_startMousePosition = value; } |
| } |
|
|
| protected bool BeginDrag() |
| { |
| if (DragControl == null) |
| return false; |
|
|
| StartMousePosition = Control.MousePosition; |
|
|
| if (!Win32Helper.IsRunningOnMono) |
| { |
| if (!NativeMethods.DragDetect(DragControl.Handle, StartMousePosition)) |
| { |
| return false; |
| } |
| } |
|
|
| DragControl.FindForm().Capture = true; |
| AssignHandle(DragControl.FindForm().Handle); |
| Application.AddMessageFilter(this); |
| return true; |
| } |
|
|
| protected abstract void OnDragging(); |
|
|
| protected abstract void OnEndDrag(bool abort); |
|
|
| private void EndDrag(bool abort) |
| { |
| ReleaseHandle(); |
| Application.RemoveMessageFilter(this); |
| DragControl.FindForm().Capture = false; |
|
|
| OnEndDrag(abort); |
| } |
|
|
| bool IMessageFilter.PreFilterMessage(ref Message m) |
| { |
| if (m.Msg == (int)Win32.Msgs.WM_MOUSEMOVE) |
| OnDragging(); |
| else if (m.Msg == (int)Win32.Msgs.WM_LBUTTONUP) |
| EndDrag(false); |
| else if (m.Msg == (int)Win32.Msgs.WM_CAPTURECHANGED) |
| EndDrag(true); |
| else if (m.Msg == (int)Win32.Msgs.WM_KEYDOWN && (int)m.WParam == (int)Keys.Escape) |
| EndDrag(true); |
|
|
| return OnPreFilterMessage(ref m); |
| } |
|
|
| protected virtual bool OnPreFilterMessage(ref Message m) |
| { |
| return false; |
| } |
|
|
| protected sealed override void WndProc(ref Message m) |
| { |
| if (m.Msg == (int)Win32.Msgs.WM_CANCELMODE || m.Msg == (int)Win32.Msgs.WM_CAPTURECHANGED) |
| EndDrag(true); |
|
|
| base.WndProc(ref m); |
| } |
| } |
|
|
| private abstract class DragHandler : DragHandlerBase |
| { |
| private DockPanel m_dockPanel; |
|
|
| protected DragHandler(DockPanel dockPanel) |
| { |
| m_dockPanel = dockPanel; |
| } |
|
|
| public DockPanel DockPanel |
| { |
| get { return m_dockPanel; } |
| } |
|
|
| private IDragSource m_dragSource; |
| protected IDragSource DragSource |
| { |
| get { return m_dragSource; } |
| set { m_dragSource = value; } |
| } |
|
|
| protected sealed override Control DragControl |
| { |
| get { return DragSource == null ? null : DragSource.DragControl; } |
| } |
|
|
| protected sealed override bool OnPreFilterMessage(ref Message m) |
| { |
| if ((m.Msg == (int)Win32.Msgs.WM_KEYDOWN || m.Msg == (int)Win32.Msgs.WM_KEYUP) && |
| ((int)m.WParam == (int)Keys.ControlKey || (int)m.WParam == (int)Keys.ShiftKey)) |
| OnDragging(); |
|
|
| return base.OnPreFilterMessage(ref m); |
| } |
| } |
| } |
| } |
|
|
