namespace Dtx.Windows.Forms
{
[System.ComponentModel.Browsable(false)]
[System.ComponentModel.DesignTimeVisible(false)]
public class DragableContainer : System.Windows.Forms.Panel
{
// Begin: Singleton Pattern
private static DragableContainer _instance;
public static DragableContainer Instance
{
get
{
if (_instance == null)
_instance = new DragableContainer();
return (_instance);
}
}
private DragableContainer()
{
Initialize();
}
// End: Singleton Pattern
protected enum DragModes
{
None,
TopLeft,
TopRight,
Top,
BottomLeft,
BottomRight,
Bottom,
Left,
Right
}
private System.Windows.Forms.Control _myControl;
protected System.Windows.Forms.Control MyControl
{
get
{
return (_myControl);
}
set
{
_myControl = value;
if (value != null)
{
_myControl.Resize += new System.EventHandler(MyControl_Resize);
_myControl.MouseEnter += new System.EventHandler(MyControl_MouseEnter);
}
}
}
private System.Windows.Forms.AnchorStyles _myControlAnchorStyles;
protected System.Windows.Forms.AnchorStyles MyControlAnchorStyles
{
get
{
return (_myControlAnchorStyles);
}
set
{
_myControlAnchorStyles = value;
}
}
protected virtual int Gap
{
get
{
return (1);
}
}
private bool _isMouseDown;
protected bool IsMouseDown
{
get
{
return (_isMouseDown);
}
set
{
_isMouseDown = value;
}
}
private int _edgeSize;
[System.ComponentModel.DefaultValue(4)]
public virtual int EdgeSize
{
get
{
return (_edgeSize);
}
set
{
_edgeSize = value;
}
}
private DragModes _dragMode;
protected DragModes DragMode
{
get
{
return (_dragMode);
}
set
{
_dragMode = value;
}
}
private System.Drawing.Pen _squarePen;
protected System.Drawing.Pen SquarePen
{
get
{
if (_squarePen == null)
_squarePen = new System.Drawing.Pen(System.Drawing.Color.Black, 1);
return (_squarePen);
}
}
private System.Drawing.Brush _squareFillBrush;
protected System.Drawing.Brush SquareFillBrush
{
get
{
if (_squareFillBrush == null)
_squareFillBrush = new System.Drawing.SolidBrush(System.Drawing.Color.White);
return (_squareFillBrush);
}
}
protected virtual void RefreshControl()
{
Refresh();
Invalidate();
}
public virtual void SetControl(System.Windows.Forms.Control control)
{
if (MyControl == control)
return;
System.Windows.Forms.Control ctlParent = null;
if (MyControl != null)
{
ctlParent = Parent;
MyControl.Top = Top + EdgeSize + Gap;
MyControl.Left = Left + EdgeSize + Gap;
MyControl.Width = Width - EdgeSize * 2 - Gap - 1;
MyControl.Height = Height - EdgeSize * 2 - Gap - 1;
Controls.Remove(MyControl);
ctlParent.Controls.Add(MyControl);
// It's too important to write this code here!
// specially if the control is for [Label].
MyControl.Anchor = MyControlAnchorStyles;
}
if (control == null)
{
if (ctlParent != null)
{
MyControl = null;
ctlParent.Controls.Remove(this);
}
}
else
{
MyControl = control;
MyControlAnchorStyles = MyControl.Anchor;
MyControl.Anchor =
System.Windows.Forms.AnchorStyles.Top |
System.Windows.Forms.AnchorStyles.Left |
System.Windows.Forms.AnchorStyles.Right |
System.Windows.Forms.AnchorStyles.Bottom;
Top = control.Top - EdgeSize - Gap;
Left = control.Left - EdgeSize - Gap;
Width = MyControl.Width + EdgeSize * 2 + Gap + 1;
Height = MyControl.Height + EdgeSize * 2 + Gap + 1;
ctlParent = control.Parent;
ctlParent.Controls.Remove(MyControl);
MyControl.Top = EdgeSize + Gap;
MyControl.Left = EdgeSize + Gap;
Controls.Add(MyControl);
ctlParent.Controls.Add(this);
}
Initialize();
}
protected virtual void Initialize()
{
EdgeSize = 4;
IsMouseDown = false;
DragMode = DragModes.None;
RefreshControl();
}
protected void MyControl_Resize(object sender, System.EventArgs e)
{
if (Width != MyControl.Width + EdgeSize * 2 + Gap + 1)
Width = MyControl.Width + EdgeSize * 2 + Gap + 1;
if (Height != MyControl.Height + EdgeSize * 2 + Gap + 1)
Height = MyControl.Height + EdgeSize * 2 + Gap + 1;
}
protected virtual void MyControl_MouseEnter(object sender, System.EventArgs e)
{
// Node
DragMode = DragModes.None;
Cursor = System.Windows.Forms.Cursors.Default;
RefreshControl();
}
protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
{
base.OnMouseDown(e);
// If we are in design mode (not in runtime mode) do nothing.
if (DesignMode)
return;
if (e.Button == System.Windows.Forms.MouseButtons.Left)
IsMouseDown = true;
}
protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
{
base.OnMouseMove(e);
// If we are in design mode (not in runtime mode) do nothing.
if (DesignMode)
return;
if ((IsMouseDown) && (DragMode != DragModes.None))
{
SuspendLayout();
switch (DragMode)
{
case DragModes.TopLeft:
{
//SetBounds(Left + e.X, Top + e.Y, Width, Height); // Original
SetBounds(Left + e.X - EdgeSize, Top + e.Y - EdgeSize, Width, Height);
break;
}
case DragModes.TopRight:
{
SetBounds(Left, Top + e.Y, e.X + EdgeSize, Height - e.Y);
break;
}
case DragModes.Top:
{
SetBounds(Left, Top + e.Y, Width, Height - e.Y);
break;
}
case DragModes.BottomLeft:
{
SetBounds(Left + e.X, Top, Width - e.X, e.Y + EdgeSize);
break;
}
case DragModes.BottomRight:
{
SetBounds(Left, Top, e.X + EdgeSize, e.Y + EdgeSize);
break;
}
case DragModes.Bottom:
{
// SetBounds(Left, Top, Width, e.Y); // Original
SetBounds(Left, Top, Width, e.Y + EdgeSize);
break;
}
case DragModes.Left:
{
SetBounds(Left + e.X, Top, Width - e.X, Height);
break;
}
case DragModes.Right:
{
//SetBounds(Left, Top, e.X, Height); // Original
SetBounds(Left, Top, e.X + EdgeSize, Height);
break;
}
}
ResumeLayout();
}
else
{
// Top Left
if ((e.Y <= EdgeSize * 2) && (e.X <= EdgeSize * 2))
{
DragMode = DragModes.TopLeft;
Cursor = System.Windows.Forms.Cursors.SizeAll;
RefreshControl();
return;
}
// Top Right
if ((e.Y <= EdgeSize) && (e.X >= Width - EdgeSize))
{
DragMode = DragModes.TopRight;
Cursor = System.Windows.Forms.Cursors.SizeNESW;
RefreshControl();
return;
}
// Top
if (e.Y <= EdgeSize)
{
DragMode = DragModes.Top;
Cursor = System.Windows.Forms.Cursors.SizeNS;
RefreshControl();
return;
}
// Bottom Left
if ((e.Y >= Height - EdgeSize) && (e.X <= EdgeSize))
{
DragMode = DragModes.BottomLeft;
Cursor = System.Windows.Forms.Cursors.SizeNESW;
RefreshControl();
return;
}
// Bottom Right
if ((e.Y >= Height - EdgeSize) && (e.X >= Width - EdgeSize))
{
DragMode = DragModes.BottomRight;
Cursor = System.Windows.Forms.Cursors.SizeNWSE;
RefreshControl();
return;
}
// Bottom
if (e.Y >= Height - EdgeSize)
{
DragMode = DragModes.Bottom;
Cursor = System.Windows.Forms.Cursors.SizeNS;
RefreshControl();
return;
}
// Left
if (e.X <= EdgeSize)
{
DragMode = DragModes.Left;
Cursor = System.Windows.Forms.Cursors.SizeWE;
RefreshControl();
return;
}
// Right
if (e.X >= Width - EdgeSize)
{
DragMode = DragModes.Right;
Cursor = System.Windows.Forms.Cursors.SizeWE;
RefreshControl();
return;
}
// Node
DragMode = DragModes.None;
Cursor = System.Windows.Forms.Cursors.Default;
}
RefreshControl();
}
protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
{
base.OnMouseUp(e);
// If we are in design mode (not in runtime mode) do nothing.
if (DesignMode)
return;
IsMouseDown = false;
DragMode = DragModes.None;
RefreshControl();
}
protected override void OnMouseLeave(System.EventArgs e)
{
base.OnMouseLeave(e);
// If we are in design mode (not in runtime mode) do nothing.
if (DesignMode)
return;
IsMouseDown = false;
DragMode = DragModes.None;
RefreshControl();
}
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
base.OnPaint(e);
// If we are in design mode (not in runtime mode) do nothing.
if (DesignMode)
return;
int intTop;
int intLeft;
int intSquareWidth = EdgeSize;
int intSquareHeight = EdgeSize;
int intSquareFillWidth = EdgeSize - 1;
int intSquareFillHeight = EdgeSize - 1;
System.Drawing.Graphics oGraphics = e.Graphics;
// Draw Square in [Top Left]
intTop = 0;
intLeft = 0;
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
// Draw Square in [Top Middle]
intTop = 0;
intLeft = (Width - EdgeSize) / 2 + (EdgeSize / 2);
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
// Draw Square in [Top Right]
intTop = 0;
intLeft = Width - EdgeSize - 1;
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
// Draw Square in [Middle Left]
intTop = (Height - EdgeSize) / 2;
intLeft = 0;
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
// Draw Square in [Middle Right]
intTop = (Height - EdgeSize) / 2;
intLeft = Width - EdgeSize - 1;
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
// Draw Square in [Bottom Left]
intTop = Height - EdgeSize - 1;
intLeft = 0;
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
// Draw Square in [Bottom Middle]
intTop = Height - EdgeSize - 1;
intLeft = (Width - EdgeSize) / 2 + (EdgeSize / 2);
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
// Draw Square in [Bottom Right]
intTop = Height - EdgeSize - 1;
intLeft = Width - EdgeSize - 1;
oGraphics.DrawRectangle(SquarePen, intLeft, intTop, intSquareWidth, intSquareHeight);
oGraphics.FillRectangle(SquareFillBrush, intLeft + 1, intTop + 1, intSquareFillWidth, intSquareFillHeight);
if (Width != MyControl.Width + EdgeSize * 2 + Gap + 1)
Width = MyControl.Width + EdgeSize * 2 + Gap + 1;
if (Height != MyControl.Height + EdgeSize * 2 + Gap + 1)
Height = MyControl.Height + EdgeSize * 2 + Gap + 1;
}
}
}
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