/// <summary>
/// Corrects the object's size and sizing point if the size becomes negative.
/// </summary>
/// <param name="e">Current mouse state.</param>
/// <para>Typically you don't need to use or override this method.</para>
/// <para>This method is called by the FastReport designer to check if the object's size becomes negative
/// when resizing the object by the mouse. Method must correct the object's size and/or position to
/// make it positive, also change the sizing point if needed.</para>
public virtual void CheckNegativeSize(FRMouseEventArgs e)
{
if (Width < 0 && Height < 0)
{
e.SizingPoint = SizingPointHelper.SwapDiagonally(e.SizingPoint);
Bounds = new RectangleF(Right, Bottom, -Width, -Height);
}
else if (Width < 0)
{
e.SizingPoint = SizingPointHelper.SwapHorizontally(e.SizingPoint);
Bounds = new RectangleF(Right, Top, -Width, Height);
}
else if (Height < 0)
{
e.SizingPoint = SizingPointHelper.SwapVertically(e.SizingPoint);
Bounds = new RectangleF(Left, Bottom, Width, -Height);
}
else
{
return;
}
Cursor.Current = SizingPointHelper.ToCursor(e.SizingPoint);
}
/// <summary>
/// Handles MouseMove event that occurs when the user moves the mouse in the designer.
/// </summary>
/// <remarks>
/// <para>This method is called when the user moves the mouse in the designer. The
/// standard implementation does the following:</para>
/// <list type="bullet">
/// <item>
/// if mouse button is not pressed, check that mouse pointer is inside one of
/// the selection points returned by the <see cref="GetSelectionPoints"/>
/// method and set the <b>e.SizingPoint</b> member to the corresponding sizing
/// point;
/// </item>
/// <item>if mouse button is pressed, and <b>e.SizingPoint</b> member is not
/// <b>SizingPoint.None</b>, resize the object.</item>
/// </list>
/// </remarks>
/// <param name="e">Current mouse state.</param>
public virtual void HandleMouseMove(FRMouseEventArgs e)
{
if (!IsSelected)
{
return;
}
if (e.Button == MouseButtons.None)
{
PointF point = new PointF(e.X, e.Y);
e.SizingPoint = SizingPoint.None;
SelectionPoint[] selectionPoints = GetSelectionPoints();
foreach (SelectionPoint pt in selectionPoints)
{
if (PointInSelectionPoint(pt.X, pt.Y, point))
{
e.SizingPoint = pt.SizingPoint;
break;
}
}
if (e.SizingPoint != SizingPoint.None)
{
e.Handled = true;
e.Mode = WorkspaceMode2.Size;
e.Cursor = SizingPointHelper.ToCursor(e.SizingPoint);
}
}
else if (!IsParentSelected)
{
if (e.Mode == WorkspaceMode2.Move)
{
Left += e.Delta.X;
Top += e.Delta.Y;
}
else if (e.Mode == WorkspaceMode2.Size)
{
switch (e.SizingPoint)
{
case SizingPoint.LeftTop:
Left += e.Delta.X;
Width -= e.Delta.X;
Top += e.Delta.Y;
Height -= e.Delta.Y;
break;
case SizingPoint.LeftBottom:
Left += e.Delta.X;
Width -= e.Delta.X;
Height += e.Delta.Y;
break;
case SizingPoint.RightTop:
Width += e.Delta.X;
Top += e.Delta.Y;
Height -= e.Delta.Y;
break;
case SizingPoint.RightBottom:
Width += e.Delta.X;
Height += e.Delta.Y;
break;
case SizingPoint.TopCenter:
Top += e.Delta.Y;
Height -= e.Delta.Y;
break;
case SizingPoint.BottomCenter:
Height += e.Delta.Y;
break;
case SizingPoint.LeftCenter:
Left += e.Delta.X;
Width -= e.Delta.X;
break;
case SizingPoint.RightCenter:
Width += e.Delta.X;
break;
}
CheckNegativeSize(e);
}
CheckParent(false);
}
}
