protected override void OnMouseMove(MouseEventArgs e)
{
// Khi di chuyển chuột (và đè chuột trái - tức đang vẽ) trên vùng DrawBox
// Với các trường hợp vẽ hình: liên tục cập nhật lại DrawBox để tạo độ mượt
// (xét trường hợp có đè nút Shift tạo hình vuông) ở phần vẽ hình
base.OnMouseMove(e);
switch (_drawStatus)
{
case DrawStatus.LineDrawing:
ptMouseMove = e.Location;
break;
case DrawStatus.ToolDrawing:
DrawDrag(ptMouseDown, e.Location, MyPaint.DrawType);
ptMouseDown = e.Location;
break;
case DrawStatus.TextDrawing:
areaRect = ShapePaint.CreateRectangle(ptMouseDown, e.Location);
break;
case DrawStatus.ShapeDrawing:
if (ModifierKeys == Keys.Shift)
{
areaRect = ShapePaint.CreateSquare(ptMouseDown, e.Location);
}
else
{
areaRect = ShapePaint.CreateRectangle(ptMouseDown, e.Location);
}
break;
case DrawStatus.EditDrawing:
_dragHandle = EditPaint.GetDragHandle(e.Location, areaRect);
if (_dragHandle < 9)
{
UpdateCursor();
}
else if (areaRect.Contains(e.Location))
{
Cursor = Cursors.SizeAll;
}
else
{
Cursor = Cursors.Default;
}
break;
case DrawStatus.ResizingShape:
EditPaint.UpdateResizeRect(ref areaRect, oldRect, ptMouseDown, e.Location, _dragHandle);
break;
case DrawStatus.MovingShape:
EditPaint.UpdateMoveRect(ref areaRect, oldRect, ptMouseDown, e.Location);
break;
}
this.Invalidate();
}
protected override void OnPaint(PaintEventArgs e)
{
// Vẽ liên tục các hình tạm trên DrawBox nhằm tạo độ mượt
base.OnPaint(e);
switch (_drawStatus)
{
case DrawStatus.LineDrawing:
e.Graphics.DrawLine(_pen, ptMouseDown, ptMouseMove);
break;
case DrawStatus.TextDrawing:
ShapePaint.DrawShape(e.Graphics, _pen, areaRect, "Rectangle");
break;
case DrawStatus.ShapeDrawing:
ShapePaint.DrawShape(e.Graphics, _pen, areaRect, MyPaint.DrawType);
break;
case DrawStatus.ResizingShape:
case DrawStatus.MovingShape:
case DrawStatus.EditDrawing:
if (MyPaint.DrawType == "Text")
{
if (areaRect.Height < textRect.Height)
{
areaRect.Height = textRect.Height;
ShapePaint.DrawShape(e.Graphics, _pen, areaRect, "Rectangle");
}
}
else
{
ShapePaint.DrawShape(e.Graphics, _pen, areaRect, MyPaint.DrawType);
}
EditPaint.DrawDragRectangle(e.Graphics, areaRect);
break;
}
}
protected override void OnMouseUp(MouseEventArgs e)
{
// Nhấc chuột lên: Hoàn thành vẽ với vẽ đường thẳng, các trường hợp còn lại chuyển sang Resize
base.OnMouseUp(e);
switch (_drawStatus)
{
case DrawStatus.LineDrawing:
_g = Graphics.FromImage(Image);
if (ptMouseDown != ptMouseMove)
{
UndoList.Push(new Bitmap(Image));
RedoList.Clear();
_g.DrawLine(_pen, ptMouseDown, ptMouseMove);
RedoList.Push(new Bitmap(Image));
}
_drawStatus = DrawStatus.Idle;
break;
case DrawStatus.ToolDrawing:
_drawStatus = DrawStatus.Idle;
RedoList.Push(new Bitmap(Image));
break;
case DrawStatus.TextDrawing:
if (areaRect != Rectangle.Empty)
{
_drawStatus = DrawStatus.EditDrawing;
DrawTextBox(null);
}
else
{
_drawStatus = DrawStatus.Idle;
}
break;
case DrawStatus.ShapeDrawing:
_g = CreateGraphics();
if (areaRect.Width > 1 && areaRect.Height > 1 && ptMouseDown != e.Location)
{
UndoList.Push(new Bitmap(Image));
RedoList.Clear();
ShapePaint.DrawShape(_g, _pen, areaRect, MyPaint.DrawType);
EditPaint.DrawDragRectangle(_g, areaRect);
_drawStatus = DrawStatus.EditDrawing;
}
else
{
_drawStatus = DrawStatus.Idle;
}
break;
case DrawStatus.ResizingShape:
case DrawStatus.MovingShape:
if (MyPaint.DrawType == "Text")
{
textBoxPopUp.Dispose();
DrawTextBox(TextToDraw);
}
_drawStatus = DrawStatus.EditDrawing;
break;
}
}