public HCFloatLineItem(HCCustomData AOwnerData) : base(AOwnerData)
{
this.StyleNo = HCFloatStyle.Line;
FMouseDownObj = HCLineObj.cloNone;
Width = 100;
Height = 70;
FStartPt = new POINT(0, 0);
FEndPt = new POINT(Width, Height);
}
public override void MouseMove(MouseEventArgs e)
{
if (Active)
{
if (this.Resizing)
{
if (FMouseDownObj == HCLineObj.cloLeftOrTop)
{
FStartPt.Offset(e.X - this.FResizeX, e.Y - this.FResizeY);
}
else
{
FEndPt.Offset(e.X - this.FResizeX, e.Y - this.FResizeY);
}
this.FResizeX = e.X;
this.FResizeY = e.Y;
HC.GCursor = Cursors.Cross;
}
else
{
HCLineObj vLineObj = GetLineObjAt(e.X, e.Y);
if ((vLineObj == HCLineObj.cloLeftOrTop) || (vLineObj == HCLineObj.cloRightOrBottom))
{
HC.GCursor = Cursors.Cross;
}
else
if (vLineObj != HCLineObj.cloNone)
{
HC.GCursor = Cursors.SizeAll;
}
}
}
else
{
HC.GCursor = Cursors.Default;
}
}
public override void MouseDown(MouseEventArgs e)
{
if (Active)
{
FMouseDownObj = GetLineObjAt(e.X, e.Y);
this.Resizing = (e.Button == MouseButtons.Left) &&
((FMouseDownObj == HCLineObj.cloLeftOrTop) || (FMouseDownObj == HCLineObj.cloRightOrBottom));
if (this.Resizing)
{
this.FResizeX = e.X;
this.FResizeY = e.Y;
// 缩放前的Rect的LeftTop
if (FStartPt.X < FEndPt.X)
{
FLeftTop.X = FStartPt.X;
}
else
{
FLeftTop.X = FEndPt.X;
}
if (FStartPt.Y < FEndPt.Y)
{
FLeftTop.Y = FStartPt.Y;
}
else
{
FLeftTop.Y = FEndPt.Y;
}
}
}
else
{
FMouseDownObj = HCLineObj.cloNone;
Active = PtInClient(e.X, e.Y);
}
}
private HCLineObj GetLineObjAt(int X, int Y)
{
HCLineObj Result = HCLineObj.cloNone;
if (HC.PtInRect(new RECT(FStartPt.X - PointSize, FStartPt.Y - PointSize, FStartPt.X + PointSize, FStartPt.Y + PointSize), new POINT(X, Y)))
{
Result = HCLineObj.cloLeftOrTop;
}
else
if (HC.PtInRect(new RECT(FEndPt.X - PointSize, FEndPt.Y - PointSize, FEndPt.X + PointSize, FEndPt.Y + PointSize), new POINT(X, Y)))
{
Result = HCLineObj.cloRightOrBottom;
}
else
{
POINT[] vPointArr = new POINT[4];
vPointArr[0] = new POINT(FStartPt.X - PointSize, FStartPt.Y);
vPointArr[1] = new POINT(FStartPt.X + PointSize, FStartPt.Y);
vPointArr[2] = new POINT(FEndPt.X + PointSize, FEndPt.Y);
vPointArr[3] = new POINT(FEndPt.X - PointSize, FEndPt.Y);
IntPtr vRgn = (IntPtr)GDI.CreatePolygonRgn(ref vPointArr[0], 4, GDI.WINDING);
try
{
if (GDI.PtInRegion(vRgn, X, Y) > 0)
{
Result = HCLineObj.cloLine;
}
}
finally
{
GDI.DeleteObject(vRgn);
}
}
return(Result);
}
