private ToolboxSnapDragDropEventArgs CreateToolboxSnapArgs(DragEventArgs e, Point mouseLoc)
{
ToolboxSnapDragDropEventArgs.SnapDirection none = ToolboxSnapDragDropEventArgs.SnapDirection.None;
Point empty = Point.Empty;
bool flag = false;
bool flag2 = false;
if (this.dragManager != null)
{
foreach (DragAssistanceManager.Line line in this.dragManager.GetRecentLines())
{
if (line.LineType == DragAssistanceManager.LineType.Standard)
{
if (!flag && (line.x1 == line.x2))
{
if (line.x1 == this.lastRectangle.Left)
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Left;
empty.X = this.lastRectangle.Left - mouseLoc.X;
}
else
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Right;
empty.X = this.lastRectangle.Right - mouseLoc.X;
}
flag = true;
}
else if (!flag2 && (line.y1 == line.y2))
{
if (line.y1 == this.lastRectangle.Top)
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Top;
empty.Y = this.lastRectangle.Top - mouseLoc.Y;
}
else if (line.y1 == this.lastRectangle.Bottom)
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Bottom;
empty.Y = this.lastRectangle.Bottom - mouseLoc.Y;
}
flag2 = true;
}
}
else if ((line.LineType == DragAssistanceManager.LineType.Margin) || (line.LineType == DragAssistanceManager.LineType.Padding))
{
if (!flag2 && (line.x1 == line.x2))
{
if (Math.Max(line.y1, line.y2) <= this.lastRectangle.Top)
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Top;
empty.Y = this.lastRectangle.Top - mouseLoc.Y;
}
else
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Bottom;
empty.Y = this.lastRectangle.Bottom - mouseLoc.Y;
}
flag2 = true;
}
else if (!flag && (line.y1 == line.y2))
{
if (Math.Max(line.x1, line.x2) <= this.lastRectangle.Left)
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Left;
empty.X = this.lastRectangle.Left - mouseLoc.X;
}
else
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Right;
empty.X = this.lastRectangle.Right - mouseLoc.X;
}
flag = true;
}
}
if (flag && flag2)
{
break;
}
}
}
if (!flag)
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Left;
empty.X = this.lastRectangle.Left - mouseLoc.X;
}
if (!flag2)
{
none |= ToolboxSnapDragDropEventArgs.SnapDirection.Top;
empty.Y = this.lastRectangle.Top - mouseLoc.Y;
}
return(new ToolboxSnapDragDropEventArgs(none, empty, e));
}
/// <summary>
/// Called on a DragDrop - this generates our extra drag info
/// to pass along to the base class. Basically, we get the
/// last-rendered snaplines before the drop and attempt to
/// identify to which direction the mouse was snapped.
/// </summary>
private ToolboxSnapDragDropEventArgs CreateToolboxSnapArgs(DragEventArgs e, Point mouseLoc)
{
//we're trying to set these two vars here...
ToolboxSnapDragDropEventArgs.SnapDirection snapDirections = ToolboxSnapDragDropEventArgs.SnapDirection.None;
Point offset = Point.Empty;
//as soon as these vars are true - we can stop looking at lines
bool horizontalComponentIdentified = false;
bool verticalComponentIdentified = false;
if (dragManager != null)
{
DragAssistanceManager.Line[] lines = dragManager.GetRecentLines();
foreach (DragAssistanceManager.Line line in lines)
{
if (line.LineType == DragAssistanceManager.LineType.Standard)
{
if (!horizontalComponentIdentified && line.x1 == line.x2)
{
//check for vertical equality
if (line.x1 == lastRectangle.Left)
{
//we had a line on the left of the box - so we must have snapped left
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Left;
offset.X = lastRectangle.Left - mouseLoc.X;
}
else
{//MUST BE RIGHT? if (lines.x1 == lastRectangle.Right) {
//we had a line on the right of the box - so we must have snapped right
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Right;
offset.X = lastRectangle.Right - mouseLoc.X;
}
horizontalComponentIdentified = true;
}
else if (!verticalComponentIdentified && line.y1 == line.y2)
{
//check for vertical equality
if (line.y1 == lastRectangle.Top)
{
//we had a line on the top of the box - so we must have snapped top
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Top;
offset.Y = lastRectangle.Top - mouseLoc.Y;
}
else if (line.y1 == lastRectangle.Bottom)
{
//we had a line on the bottom of the box - so we must have snapped bottom
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Bottom;
offset.Y = lastRectangle.Bottom - mouseLoc.Y;
}
verticalComponentIdentified = true;
}
}
else if ((line.LineType == DragAssistanceManager.LineType.Margin) ||
(line.LineType == DragAssistanceManager.LineType.Padding))
{
if (!verticalComponentIdentified && line.x1 == line.x2)
{
//now, we're looking at a vertical margin line - is it above?
if (Math.Max(line.y1, line.y2) <= lastRectangle.Top)
{
//aha - we had a margin line at the top of the box
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Top;
offset.Y = lastRectangle.Top - mouseLoc.Y;
}
else
{
//aha - we had a margin line at the bottom of the box
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Bottom;
offset.Y = lastRectangle.Bottom - mouseLoc.Y;
}
verticalComponentIdentified = true;
}
else if (!horizontalComponentIdentified && line.y1 == line.y2)
{
//now, we're looking at a horz margin line - is it left?
if (Math.Max(line.x1, line.x2) <= lastRectangle.Left)
{
//aha - we had a margin line at the left of the box
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Left;
offset.X = lastRectangle.Left - mouseLoc.X;
}
else
{
//aha - we had a margin line at the right of the box
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Right;
offset.X = lastRectangle.Right - mouseLoc.X;
}
horizontalComponentIdentified = true;
}
}
if (horizontalComponentIdentified && verticalComponentIdentified)
{
//we've found both components - stop looping
break;
}
}
}
//set default values is we haven't identified any 'snaps'
if (!horizontalComponentIdentified)
{
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Left;
offset.X = lastRectangle.Left - mouseLoc.X;
}
if (!verticalComponentIdentified)
{
snapDirections |= ToolboxSnapDragDropEventArgs.SnapDirection.Top;
offset.Y = lastRectangle.Top - mouseLoc.Y;
}
//create our arg and pass it back
return(new ToolboxSnapDragDropEventArgs(snapDirections, offset, e));
}
