Beispiel #1
0
        /// <summary>
        /// Right mouse button is released
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseUp(DrawArea 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;
            }
        }
Beispiel #2
0
        /// <summary>
        /// Draw rectangle
        /// </summary>
        /// <param name="g"></param>
        public override void Draw(Graphics g)
        {
            Pen pen = new Pen(Color, PenWidth);

            g.DrawRectangle(pen, DrawRectangle.GetNormalizedRectangle(Rectangle));

            pen.Dispose();
        }
Beispiel #3
0
        /// <summary>
        /// Draw rectangle
        /// </summary>
        /// <param name="g"></param>
        public override void Draw(Graphics g, double zoomFactor = 1.0)
        {
            Pen pen = new Pen(Color, PenWidth);

            int       zX         = (int)(Math.Round(Rectangle.X * zoomFactor));
            int       zY         = (int)(Math.Round(Rectangle.Y * zoomFactor));
            int       zW         = (int)(Math.Round(Rectangle.Width * zoomFactor));
            int       zH         = (int)(Math.Round(Rectangle.Height * zoomFactor));
            Rectangle zoomedRect = new Rectangle(zX, zY, zW, zH);

            g.DrawRectangle(pen, DrawRectangle.GetNormalizedRectangle(zoomedRect));

            pen.Dispose();
        }
Beispiel #4
0
        /// <summary>
        /// Right mouse button is released
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseUp(ImageDrawBox drawArea, MouseEventArgs e)
        {
            if (selectMode == SelectionMode.NetSelection)
            {
                // Remove old selection rectangle
                ControlPaint.DrawReversibleFrame(
                    drawArea.RectangleToScreen(DrawRectangle.GetNormalizedRectangle(startPoint, lastPoint)),
                    Color.Black,
                    FrameStyle.Dashed);

                //Point pointscroll = GetEventPointInArea(drawArea, e);
                // Make group selection
                //zhoujin - user zoomfactor
                //drawArea.GraphicsList.SelectInRectangle(
                //    DrawRectangle.GetNormalizedRectangle(new Point(startPoint.X + Math.Abs(drawArea.AutoScrollPosition.X), startPoint.Y + Math.Abs(drawArea.AutoScrollPosition.Y)),
                //                                        new Point(lastPoint.X + Math.Abs(drawArea.AutoScrollPosition.X), lastPoint.Y + Math.Abs(drawArea.AutoScrollPosition.Y))));
                double zoomFactor = drawArea.ZoomFactor;
                drawArea.GraphicsList.SelectInRectangle(
                    DrawRectangle.GetNormalizedRectangle(new Point(ConvertToZoomed(startPoint.X, zoomFactor), ConvertToZoomed(startPoint.Y, zoomFactor)),
                                                         new Point(ConvertToZoomed(lastPoint.X, zoomFactor), ConvertToZoomed(lastPoint.Y, zoomFactor))));

                selectMode = SelectionMode.None;
            }

            if (resizedObject != null)
            {
                // after resizing
                resizedObject.Normalize();
                resizedObject = null;
            }

            drawArea.Capture = false;
            drawArea.Refresh();
            drawArea.GraphicsList.Dirty = true;

            if (commandChangeState != null && wasMove)
            {
                // Keep state after moving/resizing and add command to history
                commandChangeState.NewState(drawArea.GraphicsList);
                drawArea.AddCommandToHistory(commandChangeState);
                commandChangeState = null;
            }
        }
Beispiel #5
0
 /// <summary>
 /// Normalize rectangle
 /// </summary>
 public override void Normalize()
 {
     rectangle = DrawRectangle.GetNormalizedRectangle(rectangle);
 }
Beispiel #6
0
        /// <summary>
        /// Left mouse button is pressed
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
        {
            Point pointscroll = GetEventPointInArea(drawArea, e);

            commandChangeState = null;
            wasMove            = false;

            selectMode = SelectionMode.None;

            // Test for resizing (only if control is selected, cursor is on the handle)
            foreach (DrawObject o in drawArea.GraphicsList.Selection)
            {
                int handleNumber = o.HitTest(pointscroll);

                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);

                    drawArea.GraphicsList.Dirty = true;
                    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(pointscroll) == 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;
                    drawArea.GraphicsList.Dirty = true;
                }
            }

            // 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);
            }
        }
Beispiel #7
0
        /// <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(DrawArea drawArea, MouseEventArgs e)
        {
            Point pointscroll = GetEventPointInArea(drawArea, e);
            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(pointscroll);

                    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;
            }

            /// Left button is pressed

            // 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(pointscroll, resizedObjectHandle);
                    drawArea.SetDirty();
                    drawArea.Refresh();
                    drawArea.GraphicsList.Dirty = true;
                }
            }

            // move
            if (selectMode == SelectionMode.Move)
            {
                foreach (DrawObject o in drawArea.GraphicsList.Selection)
                {
                    o.Move(dx, dy);
                }

                drawArea.Cursor = Cursors.SizeAll;
                drawArea.SetDirty();
                drawArea.Refresh();
                drawArea.GraphicsList.Dirty = true;
            }

            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, new Point(e.X, e.Y))),
                    Color.Black,
                    FrameStyle.Dashed);

                return;
            }
        }
Beispiel #8
0
        public override void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
        {
            _selectMode = SelectionMode.None;
            PointF point = new Point(e.X, e.Y);

            // òåñò äëÿ ðåñàéçà
            int n = drawArea.GraphicsList.SelectionCount;

            for (int i = 0; i < n; i++)
            {
                DrawObject o            = drawArea.GraphicsList.GetSelectedObject(i);
                int        handleNumber = o.HitTest(point);
                bool       hitOnOutline = o.HitOnCircumferance;

                if (handleNumber > 0)
                {
                    _selectMode = SelectionMode.Size;

                    // äåðæèì èçìåíÿåìûé îáúåêò â ÷ëåíàõ êëàññà
                    _resizedObject       = o;
                    _resizedObjectHandle = handleNumber;

                    // ïðè ðåñàéçå îäíîãî îáúåêòà, àíñåëåêòÿòñÿ âñå îñòàëüíûå
                    drawArea.GraphicsList.UnselectAll();
                    o.Selected = true;
                    o.MouseClickOnHandle(handleNumber);

                    break;
                }

                if (hitOnOutline && (n == 1))     // åñëè òîëüêî îäèí îáúåêò âûáðàí
                {
                    _selectMode = SelectionMode.Size;
                    o.MouseClickOnBorder();
                    o.Selected = true;
                }
            }

            // òåñò äëÿ ñäâèãà
            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;

                    // àíñåëåêòíóòü âñå, åñëè íå çàæàò ctrl è êëèêíóòíûé îáúåêò åùå íå âûáðàí
                    if ((Control.ModifierKeys & Keys.Control) == 0 && !o.Selected)
                    {
                        drawArea.GraphicsList.UnselectAll();
                    }

                    // âûáðàòü êëèêíóòûé îáúåêò
                    o.Selected = true;

                    drawArea.Cursor = Cursors.SizeAll;
                }
            }

            if (_selectMode == SelectionMode.None)
            {
                // êëèê íà çàäíåì ôîíå
                if ((Control.ModifierKeys & Keys.Control) == 0)
                {
                    drawArea.GraphicsList.UnselectAll();
                }

                _selectMode = SelectionMode.NetSelection;
                drawArea.DrawNetRectangle = true;
            }

            _lastPoint.X  = e.X;
            _lastPoint.Y  = e.Y;
            _startPoint.X = e.X;
            _startPoint.Y = e.Y;

            drawArea.Capture      = true;
            drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint);

            drawArea.Refresh();
        }
Beispiel #9
0
        public override void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
        {
            var point = new Point(e.X, e.Y);

            // óñòàíîâêà êóðñîðà, êîãäà ìûøü íå çàæàòà
            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 (drawArea.GraphicsList[i].HitOnCircumferance)
                    {
                        cursor = drawArea.GraphicsList[i].GetOutlineCursor(n);
                        break;
                    }
                }

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

                drawArea.Cursor = cursor;

                return;
            }

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

            // íàæàòèå ëåâîé êíîïêè

            // ðàçíèöà ìåæäó ïðåä. è òåê. ïîçèöèåé
            float dx = e.X - _lastPoint.X;
            float dy = e.Y - _lastPoint.Y;

            _lastPoint.X = e.X;
            _lastPoint.Y = e.Y;

            // ðåñàéç
            if (_selectMode == SelectionMode.Size)
            {
                if (_resizedObject != null)
                {
                    _resizedObject.MoveHandleTo(point, _resizedObjectHandle);
                    drawArea.SetDirty();
                    drawArea.Refresh();
                }
            }

            // ñäâèã
            if (_selectMode == SelectionMode.Move)
            {
                int n = drawArea.GraphicsList.SelectionCount;

                for (int i = 0; i < n; i++)
                {
                    drawArea.GraphicsList.GetSelectedObject(i).Move(dx, dy);
                }

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

            if (_selectMode == SelectionMode.NetSelection)
            {
                drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint);
                drawArea.Refresh();
                return;
            }
        }
Beispiel #10
0
        /// <summary>
        /// Left mouse button is pressed
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
        {
            commandChangeState = null;
            wasMove            = false;

            selectMode = SelectionMode.None;
            Point point = drawArea.BackTrackMouse(new Point(e.X, e.Y));

            // Test for resizing (only if control is selected, cursor is on the handle)
            int al = drawArea.TheLayers.ActiveLayerIndex;
            int n  = drawArea.TheLayers[al].Graphics.SelectionCount;

            for (int i = 0; i < n; i++)
            {
                DrawObject o            = drawArea.TheLayers[al].Graphics.GetSelectedObject(i);
                int        handleNumber = o.HitTest(point);

                if (handleNumber > 0)
                {
                    selectMode = SelectionMode.Size;
                    // keep resized object in class members
                    resizedObject       = o;
                    resizedObjectHandle = handleNumber;
                    // Since we want to resize only one object, unselect all other objects
                    drawArea.TheLayers[al].Graphics.UnselectAll();
                    o.Selected         = true;
                    commandChangeState = new CommandChangeState(drawArea.TheLayers);
                    break;
                }
            }

            // Test for move (cursor is on the object)
            if (selectMode == SelectionMode.None)
            {
                int        n1 = drawArea.TheLayers[al].Graphics.Count;
                DrawObject o  = null;

                for (int i = 0; i < n1; i++)
                {
                    if (drawArea.TheLayers[al].Graphics[i].HitTest(point) == 0)
                    {
                        o = drawArea.TheLayers[al].Graphics[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.TheLayers[al].Graphics.UnselectAll();
                    }

                    // Select clicked object
                    o.Selected         = true;
                    commandChangeState = new CommandChangeState(drawArea.TheLayers);

                    drawArea.Cursor = Cursors.SizeAll;
                }
            }

            // Net selection
            if (selectMode == SelectionMode.None)
            {
                // click on background
                if ((Control.ModifierKeys & Keys.Control) == 0)
                {
                    drawArea.TheLayers[al].Graphics.UnselectAll();
                }

                selectMode = SelectionMode.NetSelection;
                drawArea.DrawNetRectangle = true;
            }

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

            drawArea.Capture      = true;
            drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(startPoint, lastPoint);
            drawArea.Refresh();
        }
Beispiel #11
0
        /// <summary>
        /// Mouse is moved.
        /// None button is pressed, ot left button is pressed.
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        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;
            //toolTip.InitialDelay = 1;

            // set cursor when mouse button is not pressed
            if (e.Button ==
                MouseButtons.None)
            {
                Cursor cursor = null;

                if (drawArea.TheLayers[al].Graphics != null)
                {
                    // Hide tooltip in case it was displayed
                    //toolTip.Hide(drawArea);
                    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 (n == 0)
                        //    toolTip.Show(drawArea.TheLayers[al].Graphics[i].TipText, drawArea, point, 250);
                    }
                }

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

                drawArea.Cursor = cursor;
                return;
            }

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

            // Left button is pressed

            // Find difference between previous and current position
            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();
            }

            if (selectMode == SelectionMode.NetSelection)
            {
                drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(startPoint, lastPoint);
                drawArea.Refresh();
                return;
            }
        }
Beispiel #12
0
        /// <summary>
        /// Mouse is moved.
        /// None button is pressed, ot left button is pressed.
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseMove(DrawArea drawArea, MouseEventArgs e)
        {
            Point point = new Point(e.X, e.Y);

            // 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;
            }

            /// Left button is pressed

            // 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)
            {
                int n = drawArea.GraphicsList.SelectionCount;

                for (int i = 0; i < n; i++)
                {
                    drawArea.GraphicsList.GetSelectedObject(i).Move(dx, dy);
                }

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

            if (selectMode == SelectionMode.NetSelection)
            {
                drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(startPoint, lastPoint);
                drawArea.Refresh();
                return;
            }
        }
Beispiel #13
0
 /// <summary>
 /// Normalize rectangle
 /// </summary>
 public override void Normalize()
 {
     UndoRedoManager.Instance().Push(r => rectangle = DrawRectangle.GetNormalizedRectangle(r), rectangle);
     rectangle = DrawRectangle.GetNormalizedRectangle(rectangle);
 }
Beispiel #14
0
        /// <summary>
        /// Left mouse button is pressed
        /// </summary>
        /// <param name="drawArea"></param>
        /// <param name="e"></param>
        public override void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
        {
            _selectMode = SelectionMode.None;
            PointF point = new Point(e.X, e.Y);

            // Test for resizing (only if control is selected, cursor is on the handle)
            int n = drawArea.GraphicsList.SelectionCount;

            for (int i = 0; i < n; i++)
            {
                DrawObject o            = drawArea.GraphicsList.GetSelectedObject(i);
                int        handleNumber = o.HitTest(point);
                bool       hitOnOutline = o.HitOnCircumferance;

                if (handleNumber > 0)
                {
                    _selectMode = SelectionMode.Size;

                    // keep resized object in class members
                    _resizedObject       = o;
                    _resizedObjectHandle = handleNumber;

                    // Since we want to resize only one object, unselect all other objects
                    drawArea.GraphicsList.UnselectAll();
                    o.Selected = true;
                    o.MouseClickOnHandle(handleNumber);

                    break;
                }

                if (hitOnOutline && (n == 1))     //only one item is selected
                {
                    _selectMode = SelectionMode.Size;
                    o.MouseClickOnBorder();
                    o.Selected = true;
                }
            }

            // 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;

                    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;
                drawArea.DrawNetRectangle = true;
            }

            _lastPoint.X  = e.X;
            _lastPoint.Y  = e.Y;
            _startPoint.X = e.X;
            _startPoint.Y = e.Y;

            drawArea.Capture      = true;
            drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(_startPoint, _lastPoint);

            drawArea.Refresh();
        }