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Improvements to window snapping on move and resize

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This commit is contained in:
Chris Kaczor
2014-05-13 16:58:58 -04:00
parent 33271cc03a
commit ed6e5848ad
1 changed files with 234 additions and 108 deletions
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340
Windows/SnappingWindow.cs
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@@ -21,6 +21,55 @@ namespace Common.Wpf.Windows
#endregion #endregion
private class WindowBorderRectangles
{
public WindowBorderRectangles(Rectangle windowPosition, int width, bool inside)
{
var offset = inside ? width : 0;
var actualWidth = inside ? width * 2 : width;
Top = new Rectangle(windowPosition.Left, windowPosition.Top - offset, windowPosition.Width, actualWidth);
Bottom = new Rectangle(windowPosition.Left, windowPosition.Bottom - offset, windowPosition.Width, actualWidth);
Left = new Rectangle(windowPosition.Left - offset, windowPosition.Top, actualWidth, windowPosition.Height);
Right = new Rectangle(windowPosition.Right - offset, windowPosition.Top, actualWidth, windowPosition.Height);
}
public WindowBorderRectangles(Structures.WindowPosition windowPosition, int width, bool inside)
{
var offset = inside ? width : 0;
var actualWidth = inside ? width * 2 : width;
Top = new Rectangle(windowPosition.Left, windowPosition.Top - offset, windowPosition.Width, actualWidth);
Bottom = new Rectangle(windowPosition.Left, windowPosition.Bottom - offset, windowPosition.Width, actualWidth);
Left = new Rectangle(windowPosition.Left - offset, windowPosition.Top, actualWidth, windowPosition.Height);
Right = new Rectangle(windowPosition.Right - offset, windowPosition.Top, actualWidth, windowPosition.Height);
}
public Rectangle Top { get; private set; }
public Rectangle Bottom { get; private set; }
public Rectangle Left { get; private set; }
public Rectangle Right { get; private set; }
}
private class ResizeSide
{
public ResizeSide(Structures.WindowPosition position1, Structures.WindowPosition position2)
{
if (position1.IsSameSize(position2))
return;
IsTop = (position1.Top != position2.Top);
IsBottom = (position1.Bottom != position2.Bottom);
IsLeft = (position1.Left != position2.Left);
IsRight = (position1.Right != position2.Right);
}
public bool IsTop { get; private set; }
public bool IsBottom { get; private set; }
public bool IsLeft { get; private set; }
public bool IsRight { get; private set; }
}
#region Enumerations #region Enumerations
private enum SnapMode private enum SnapMode
@@ -62,20 +111,6 @@ namespace Common.Wpf.Windows
_hwndSource.AddHook(WndProc); _hwndSource.AddHook(WndProc);
} }
protected override void OnContentRendered(EventArgs e)
{
base.OnContentRendered(e);
// Initialize the last window position
_lastWindowPosition = new Structures.WindowPosition
{
Left = (int) Left,
Width = (int) Width,
Height = (int) Height,
Top = (int) Top
};
}
protected override void OnClosed(EventArgs e) protected override void OnClosed(EventArgs e)
{ {
base.OnClosed(e); base.OnClosed(e);
@@ -91,11 +126,30 @@ namespace Common.Wpf.Windows
protected virtual IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) protected virtual IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{ {
if (msg == (int) Constants.WindowMessage.WindowPositionChanging) switch (msg)
return OnWindowPositionChanging(lParam, ref handled); {
case (int) Constants.WindowMessage.WindowPositionChanging:
return OnWindowPositionChanging(lParam, ref handled);
if (msg == (int) Constants.WindowMessage.EnterSizeMove) case (int) Constants.WindowMessage.EnterSizeMove:
_otherWindows = OtherWindows;
// Initialize the last window position
_lastWindowPosition = new Structures.WindowPosition
{
Left = (int) Left,
Width = (int) Width,
Height = (int) Height,
Top = (int) Top
};
// Store the current other windows
_otherWindows = OtherWindows;
break;
case (int) Constants.WindowMessage.ExitSizeMove:
break;
}
return IntPtr.Zero; return IntPtr.Zero;
} }
@@ -123,7 +177,10 @@ namespace Common.Wpf.Windows
return IntPtr.Zero; return IntPtr.Zero;
// Figure out if the window is being moved or resized // Figure out if the window is being moved or resized
SnapMode snapMode = (_lastWindowPosition.IsSameSize(windowPosition) ? SnapMode.Move : SnapMode.Resize); var snapMode = (_lastWindowPosition.IsSameSize(windowPosition) ? SnapMode.Move : SnapMode.Resize);
// Figure out what side is resizing
var resizeSide = new ResizeSide(windowPosition, _lastWindowPosition);
// Get the screen the cursor is currently on // Get the screen the cursor is currently on
Screen screen = Screen.FromPoint(System.Windows.Forms.Cursor.Position); Screen screen = Screen.FromPoint(System.Windows.Forms.Cursor.Position);
@@ -205,54 +262,177 @@ namespace Common.Wpf.Windows
if (otherWindows != null && otherWindows.Count > 0) if (otherWindows != null && otherWindows.Count > 0)
{ {
// Get the snap source rectangles for the window being changed
var sourceRectanges = new WindowBorderRectangles(windowPosition, 1, false);
// Loop over all other windows looking to see if we should stick // Loop over all other windows looking to see if we should stick
foreach (var otherWindow in otherWindows) foreach (var otherWindow in otherWindows)
{ {
// Get a rectangle with the bounds of the other window // Get a rectangle with the bounds of the other window
var otherWindowRect = otherWindow.Location; var otherWindowRect = otherWindow.Location;
// Check the current window left against the other window right // Get the snap target rectangles for the current window
var otherWindowSnapBorder = new Rectangle(otherWindowRect.Right, otherWindowRect.Top, snapDistance, otherWindowRect.Height); var targetRectangles = new WindowBorderRectangles(otherWindow.Location, snapDistance, true);
var thisWindowSnapBorder = new Rectangle(windowPosition.Left, windowPosition.Top, 1, windowPosition.Height);
if (thisWindowSnapBorder.IntersectsWith(otherWindowSnapBorder)) if (snapMode == SnapMode.Move)
{ {
windowPosition.Left = otherWindowRect.Right; if (sourceRectanges.Left.IntersectsWith(targetRectangles.Right))
CheckSnapTopAndBottom(ref windowPosition, otherWindowRect, snapMode); {
updated = true; windowPosition.Left = otherWindowRect.Right;
updated = true;
}
if (sourceRectanges.Right.IntersectsWith(targetRectangles.Left))
{
windowPosition.Left = otherWindowRect.Left - windowPosition.Width;
updated = true;
}
if (sourceRectanges.Top.IntersectsWith(targetRectangles.Bottom))
{
windowPosition.Top = otherWindowRect.Bottom;
updated = true;
}
if (sourceRectanges.Bottom.IntersectsWith(targetRectangles.Top))
{
windowPosition.Top = otherWindowRect.Top - windowPosition.Height;
updated = true;
}
if (windowPosition.Top == otherWindowRect.Bottom || windowPosition.Bottom == otherWindowRect.Top)
{
if (Math.Abs(windowPosition.Left - otherWindowRect.Left) <= snapDistance)
{
windowPosition.Left = otherWindowRect.Left;
updated = true;
}
if (Math.Abs(windowPosition.Right - otherWindowRect.Right) <= snapDistance)
{
windowPosition.Left = otherWindowRect.Right - windowPosition.Width;
updated = true;
}
}
if (windowPosition.Left == otherWindowRect.Right || windowPosition.Right == otherWindowRect.Left)
{
if (Math.Abs(otherWindowRect.Bottom - windowPosition.Bottom) <= snapDistance)
{
windowPosition.Top = otherWindowRect.Bottom - windowPosition.Height;
updated = true;
}
if (Math.Abs(otherWindowRect.Top - windowPosition.Top) <= snapDistance)
{
windowPosition.Top = otherWindowRect.Top;
updated = true;
}
}
} }
else
// Check the current window right against the other window left
otherWindowSnapBorder = new Rectangle(otherWindowRect.Left - snapDistance + 1, otherWindowRect.Top, snapDistance, otherWindowRect.Height);
thisWindowSnapBorder = new Rectangle(windowPosition.Right, windowPosition.Top, 1, windowPosition.Height);
if (thisWindowSnapBorder.IntersectsWith(otherWindowSnapBorder))
{ {
windowPosition.Left = otherWindowRect.Left - windowPosition.Width; if (resizeSide.IsLeft)
CheckSnapTopAndBottom(ref windowPosition, otherWindowRect, snapMode); {
updated = true; // Check the current window left against the other window right
} if (sourceRectanges.Left.IntersectsWith(targetRectangles.Right))
{
var sign = windowPosition.Left < otherWindowRect.Right ? -1 : 1;
// Check the current window bottom against the other window top windowPosition.Width += Math.Abs(otherWindowRect.Right - windowPosition.Left) * sign;
otherWindowSnapBorder = new Rectangle(otherWindowRect.Left, otherWindowRect.Top - snapDistance + 1, otherWindowRect.Width, snapDistance); windowPosition.Left = otherWindowRect.Right;
thisWindowSnapBorder = new Rectangle(windowPosition.Left, windowPosition.Bottom, windowPosition.Width, 1);
if (thisWindowSnapBorder.IntersectsWith(otherWindowSnapBorder)) updated = true;
{ }
windowPosition.Top = otherWindowRect.Top - windowPosition.Height; else if (windowPosition.Top == otherWindowRect.Bottom || windowPosition.Bottom == otherWindowRect.Top)
CheckSnapLeftAndRight(ref windowPosition, otherWindowRect, snapMode); {
updated = true; if (Math.Abs(windowPosition.Left - otherWindowRect.Left) <= snapDistance)
} {
var sign = windowPosition.Left < otherWindowRect.Left ? -1 : 1;
// Check the current window top against the other window bottom windowPosition.Width += Math.Abs(otherWindowRect.Left - windowPosition.Left) * sign;
otherWindowSnapBorder = new Rectangle(otherWindowRect.Left, otherWindowRect.Bottom, otherWindowRect.Width, snapDistance); windowPosition.Left = otherWindowRect.Left;
thisWindowSnapBorder = new Rectangle(windowPosition.Left, windowPosition.Top, windowPosition.Width, 1);
if (thisWindowSnapBorder.IntersectsWith(otherWindowSnapBorder)) updated = true;
{ }
windowPosition.Top = otherWindowRect.Bottom; }
CheckSnapLeftAndRight(ref windowPosition, otherWindowRect, snapMode); }
updated = true; else if (resizeSide.IsRight)
{
// Check the current window right against the other window left
if (sourceRectanges.Right.IntersectsWith(targetRectangles.Left))
{
var sign = windowPosition.Right < otherWindowRect.Left ? 1 : -1;
windowPosition.Width += Math.Abs(otherWindowRect.Left - windowPosition.Right) * sign;
updated = true;
}
else if (windowPosition.Top == otherWindowRect.Bottom || windowPosition.Bottom == otherWindowRect.Top)
{
if (Math.Abs(windowPosition.Right - otherWindowRect.Right) <= snapDistance)
{
var sign = windowPosition.Right < otherWindowRect.Right ? 1 : -1;
windowPosition.Width += Math.Abs(otherWindowRect.Right - windowPosition.Right) * sign;
updated = true;
}
}
}
if (resizeSide.IsBottom)
{
// Check the current window bottom against the other window top
if (sourceRectanges.Bottom.IntersectsWith(targetRectangles.Top))
{
var sign = windowPosition.Bottom < otherWindowRect.Top ? 1 : -1;
windowPosition.Height += Math.Abs(otherWindowRect.Top - windowPosition.Bottom) * sign;
updated = true;
}
else if (windowPosition.Left == otherWindowRect.Right || windowPosition.Right == otherWindowRect.Left)
{
if (Math.Abs(otherWindowRect.Bottom - windowPosition.Bottom) <= snapDistance)
{
var sign = windowPosition.Bottom < otherWindowRect.Bottom ? 1 : -1;
windowPosition.Height += Math.Abs(otherWindowRect.Bottom - windowPosition.Bottom) * sign;
updated = true;
}
}
}
else if (resizeSide.IsTop)
{
// Check the current window top against the other window bottom
if (sourceRectanges.Top.IntersectsWith(targetRectangles.Bottom))
{
var sign = windowPosition.Top < otherWindowRect.Bottom ? 1 : -1;
windowPosition.Height -= Math.Abs(otherWindowRect.Bottom - windowPosition.Top) * sign;
windowPosition.Top = otherWindowRect.Bottom;
updated = true;
}
else if (windowPosition.Left == otherWindowRect.Right || windowPosition.Right == otherWindowRect.Left)
{
if (Math.Abs(otherWindowRect.Top - windowPosition.Top) <= snapDistance)
{
var sign = windowPosition.Top < otherWindowRect.Top ? -1 : 1;
windowPosition.Height += Math.Abs(otherWindowRect.Top - windowPosition.Top) * sign;
windowPosition.Top = otherWindowRect.Top;
updated = true;
}
}
}
} }
} }
} }
@@ -269,60 +449,6 @@ namespace Common.Wpf.Windows
return IntPtr.Zero; return IntPtr.Zero;
} }
private void CheckSnapTopAndBottom(ref Structures.WindowPosition windowPosition, Rectangle otherWindowRect, SnapMode snapMode)
{
int snapDistance = SnapDistance;
switch (snapMode)
{
case SnapMode.Move:
if (Math.Abs(windowPosition.Top - otherWindowRect.Top) <= snapDistance)
windowPosition.Top = otherWindowRect.Top;
else if (Math.Abs(windowPosition.Bottom - otherWindowRect.Bottom) <= snapDistance)
windowPosition.Top = otherWindowRect.Bottom - windowPosition.Height;
break;
case SnapMode.Resize:
if (Math.Abs(windowPosition.Top - otherWindowRect.Top) <= snapDistance)
{
windowPosition.Height += (windowPosition.Top - otherWindowRect.Top);
windowPosition.Top = otherWindowRect.Top;
}
else
if (Math.Abs(windowPosition.Bottom - otherWindowRect.Bottom) <= snapDistance)
windowPosition.Height = otherWindowRect.Bottom - windowPosition.Top;
break;
}
}
private void CheckSnapLeftAndRight(ref Structures.WindowPosition windowPosition, Rectangle otherWindowRect, SnapMode snapMode)
{
int snapDistance = SnapDistance;
switch (snapMode)
{
case SnapMode.Move:
if (Math.Abs(windowPosition.Left - otherWindowRect.Left) <= snapDistance)
windowPosition.Left = otherWindowRect.Left;
else if (Math.Abs(windowPosition.Right - otherWindowRect.Right) <= snapDistance)
windowPosition.Left = otherWindowRect.Right - windowPosition.Width;
break;
case SnapMode.Resize:
if (Math.Abs(windowPosition.Left - otherWindowRect.Left) <= snapDistance)
{
windowPosition.Width += (windowPosition.Left - otherWindowRect.Left);
windowPosition.Left = otherWindowRect.Left;
}
else
if (Math.Abs(windowPosition.Right - otherWindowRect.Right) <= snapDistance)
windowPosition.Width = otherWindowRect.Right - windowPosition.Left;
break;
}
}
#endregion #endregion
} }
} }