/// <summary>
/// Right mouse button is released
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="e"> </param>
public override void OnMouseUp(TransparentCanvas drawArea, MouseEventArgs e)
{
if (_selectMode == SelectionMode.NetSelection)
{
// Remove old selection rectangle
ControlPaint.DrawReversibleFrame(
drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint)),
Color.Black,
FrameStyle.Dashed);
// Make group selection
drawArea.GraphicsList.SelectInRectangle(
DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint));
_selectMode = SelectionMode.None;
}
if (_resizedObject != null)
{
// after resizing
_resizedObject.Normalize();
_resizedObject = null;
}
drawArea.Capture = false;
drawArea.Refresh();
if (_commandChangeState != null && _wasMove)
{
// Keep state after moving/resizing and add command to history
_commandChangeState.NewState(drawArea.GraphicsList);
drawArea.AddCommandToHistory(_commandChangeState);
_commandChangeState = null;
}
}
/// <summary>
/// Left mouse button is pressed
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="e"> </param>
public override void OnMouseDown(TransparentCanvas drawArea, MouseEventArgs e)
{
_commandChangeState = null;
_wasMove = false;
_selectMode = SelectionMode.None;
Point point = new Point(e.X, e.Y);
// Test for resizing (only if control is selected, cursor is on the handle)
foreach (DrawObject o in drawArea.GraphicsList.Selection)
{
int handleNumber = o.HitTest(point);
if (handleNumber > 0)
{
_selectMode = SelectionMode.Size;
// keep resized object in class member
_resizedObject = o;
_resizedObjectHandle = handleNumber;
// Since we want to resize only one object, unselect all other objects
drawArea.GraphicsList.UnselectAll();
o.Selected = true;
_commandChangeState = new CommandChangeState(drawArea.GraphicsList);
break;
}
}
// Test for move (cursor is on the object)
if (_selectMode == SelectionMode.None)
{
int n1 = drawArea.GraphicsList.Count;
DrawObject o = null;
for (int i = 0; i < n1; i++)
{
if (drawArea.GraphicsList[i].HitTest(point) == 0)
{
o = drawArea.GraphicsList[i];
break;
}
}
if (o != null)
{
_selectMode = SelectionMode.Move;
// Unselect all if Ctrl is not pressed and clicked object is not selected yet
if ((Control.ModifierKeys & Keys.Control) == 0 && !o.Selected)
{
drawArea.GraphicsList.UnselectAll();
}
// Select clicked object
o.Selected = true;
_commandChangeState = new CommandChangeState(drawArea.GraphicsList);
drawArea.Cursor = Cursors.SizeAll;
}
}
// Net selection
if (_selectMode == SelectionMode.None)
{
// click on background
if ((Control.ModifierKeys & Keys.Control) == 0)
{
drawArea.GraphicsList.UnselectAll();
}
_selectMode = SelectionMode.NetSelection;
}
_lastPoint.X = e.X;
_lastPoint.Y = e.Y;
_startPoint.X = e.X;
_startPoint.Y = e.Y;
drawArea.Capture = true;
drawArea.Refresh();
if (_selectMode == SelectionMode.NetSelection)
{
// Draw selection rectangle in initial position
ControlPaint.DrawReversibleFrame(
drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint)),
Color.Black,
FrameStyle.Dashed);
}
}
/// <summary>
/// Mouse is moved. None button is pressed, or left button is pressed.
/// </summary>
/// <param name="drawArea"> </param>
/// <param name="e"> </param>
public override void OnMouseMove(TransparentCanvas drawArea, MouseEventArgs e)
{
Point point = new Point(e.X, e.Y);
Point oldPoint = _lastPoint;
_wasMove = true;
// set cursor when mouse button is not pressed
if (e.Button == MouseButtons.None)
{
Cursor cursor = null;
for (int i = 0; i < drawArea.GraphicsList.Count; i++)
{
int n = drawArea.GraphicsList[i].HitTest(point);
if (n > 0)
{
cursor = drawArea.GraphicsList[i].GetHandleCursor(n);
break;
}
}
if (cursor == null)
{
cursor = Cursors.Default;
}
drawArea.Cursor = cursor;
return;
}
if (e.Button != MouseButtons.Left)
{
return;
}
// Find difference between previous and current position
int dx = e.X - _lastPoint.X;
int dy = e.Y - _lastPoint.Y;
_lastPoint.X = e.X;
_lastPoint.Y = e.Y;
// resize
if (_selectMode == SelectionMode.Size)
{
if (_resizedObject != null)
{
_resizedObject.MoveHandleTo(point, _resizedObjectHandle);
drawArea.SetDirty();
drawArea.Refresh();
}
}
// move
if (_selectMode == SelectionMode.Move)
{
foreach (DrawObject o in drawArea.GraphicsList.Selection)
{
o.Move(dx, dy);
}
drawArea.Cursor = Cursors.SizeAll;
drawArea.SetDirty();
drawArea.Refresh();
}
if (_selectMode == SelectionMode.NetSelection)
{
// Remove old selection rectangle
ControlPaint.DrawReversibleFrame(
drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(_startPoint, oldPoint)),
Color.Black,
FrameStyle.Dashed);
// Draw new selection rectangle
ControlPaint.DrawReversibleFrame(
drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(_startPoint, point)),
Color.Black,
FrameStyle.Dashed);
}
}