Example #1
0
        // 選択範囲を更新する
        private void UpdateArea(bool init)
        {
            var mouse = PointToClient(Cursor.Position);

            // 初回時
            if (init)
            {
                startPoint = new Point(mouse.X, mouse.Y);
                select     = new Rectangle(mouse.X, mouse.Y, 0, 0);
            }

            // 更新
            var expanded = new Rectangle(select.X - 10, select.Y - 10, select.Width + 20, select.Height + 20);

            select = RenderUtil.GetFixedArea(startPoint.Value.X, startPoint.Value.Y, mouse.X, mouse.Y);

            // レンダリング
            Invalidate(expanded);
        }