Esempio n. 1
0
        public override void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
        {
            Point point = drawArea.BackTrackMouse(new Point(e.X, e.Y));
            int   al    = drawArea.TheLayers.ActiveLayerIndex;

            wasMove = true;
            // Set con trỏ khi chưa nhấn chuột
            if (e.Button == MouseButtons.None)
            {
                Cursor cursor = null;

                if (drawArea.TheLayers[al].Graphics != null)
                {
                    for (int i = 0; i < drawArea.TheLayers[al].Graphics.Count; i++)
                    {
                        int n = drawArea.TheLayers[al].Graphics[i].HitTest(point);
                        if (n > 0)
                        {
                            cursor = drawArea.TheLayers[al].Graphics[i].GetHandleCursor(n);
                            break;
                        }
                    }
                }

                if (cursor == null)
                {
                    cursor = Cursors.Default;
                }

                drawArea.Cursor = cursor;
                return;
            }

            if (e.Button != MouseButtons.Left)
            {
                return;
            }

            // Khi nhấn trái chuột
            // Tìm khoảng cách giữa hai điểm trước và sau
            int dx = point.X - lastPoint.X;
            int dy = point.Y - lastPoint.Y;

            lastPoint.X = point.X;
            lastPoint.Y = point.Y;

            // Resize
            if (selectMode == SelectionMode.Size)
            {
                if (resizedObject != null)
                {
                    resizedObject.MoveHandleTo(point, resizedObjectHandle);
                    drawArea.Refresh();
                }
            }

            // Move
            if (selectMode == SelectionMode.Move)
            {
                int n = drawArea.TheLayers[al].Graphics.SelectionCount;

                for (int i = 0; i < n; i++)
                {
                    drawArea.TheLayers[al].Graphics.GetSelectedObject(i).Move(dx, dy);
                }

                drawArea.Cursor = Cursors.SizeAll;
                drawArea.Refresh();
            }

            // Group selection
            if (selectMode == SelectionMode.NetSelection)
            {
                drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(startPoint, lastPoint);
                drawArea.Refresh();
                return;
            }
        }