/// <summary> /// Add new object to draw area. /// Function is called when user left-clicks draw area, /// and one of ToolObject-derived tools is active. /// </summary> /// <param name="drawArea"></param> /// <param name="o"></param> protected void AddNewObject(DrawArea drawArea, DrawObject o) { drawArea.GraphicsList.UnselectAll(); o.Selected = true; drawArea.GraphicsList.Add(o); drawArea.Capture = true; drawArea.Refresh(); drawArea.SetDirty(); }
/// <summary> /// Get properties from selected objects and fill GraphicsProperties instance /// </summary> /// <returns></returns> private GraphicsProperties GetProperties() { GraphicsProperties properties = new GraphicsProperties(); int n = SelectionCount; if (n < 1) { return(properties); } DrawObject o = GetSelectedObject(0); int firstColor = o.Color.ToArgb(); int firstPenWidth = o.PenWidth; bool allColorsAreEqual = true; bool allWidthAreEqual = true; for (int i = 1; i < n; i++) { if (GetSelectedObject(i).Color.ToArgb() != firstColor) { allColorsAreEqual = false; } if (GetSelectedObject(i).PenWidth != firstPenWidth) { allWidthAreEqual = false; } } if (allColorsAreEqual) { properties.ColorDefined = true; properties.Color = Color.FromArgb(firstColor); } if (allWidthAreEqual) { properties.PenWidthDefined = true; properties.PenWidth = firstPenWidth; } return(properties); }
/// <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) { // Group selection drawArea.GraphicsList.SelectInRectangle(drawArea.NetRectangle); selectMode = SelectionMode.None; drawArea.DrawNetRectangle = false; } if (resizedObject != null) { // after resizing resizedObject.Normalize(); resizedObject = null; } drawArea.Capture = false; drawArea.Refresh(); }
public void Add(DrawObject obj) { // insert to the top of z-order graphicsList.Insert(0, obj); }
/// <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; Point 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); 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; 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; 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(); }
/// <summary> /// Right-click handler /// </summary> /// <param name="e"></param> private void OnContextMenu(MouseEventArgs e) { return; // Change current selection if necessary Point point = new Point(e.X, e.Y); int n = GraphicsList.Count; DrawObject o = null; for (int i = 0; i < n; i++) { if (GraphicsList[i].HitTest(point) == 0) { o = GraphicsList[i]; break; } } if (o != null) { if (!o.Selected) { GraphicsList.UnselectAll(); } // Select clicked object o.Selected = true; } else { GraphicsList.UnselectAll(); } Refresh(); // Show context menu. // Make ugly trick which saves a lot of code. // Get menu items from Edit menu in main form and // make context menu from them. // These menu items are handled in the parent form without // any additional efforts. MainMenu mainMenu = Owner.Menu; // Main menu MenuItem editItem = mainMenu.MenuItems[1]; // Edit submenu // Make array of items for ContextMenu constructor // taking them from the Edit submenu MenuItem[] items = new MenuItem[editItem.MenuItems.Count]; for (int i = 0; i < editItem.MenuItems.Count; i++) { items[i] = editItem.MenuItems[i]; } //Owner.SetStateOfControls(); // enable/disable menu items//设置菜单的选种状态 // Create and show context menu ContextMenu menu = new ContextMenu(items); menu.Show(this, point); // Restore items in the Edit menu (without this line Edit menu // is empty after forst right-click) editItem.MergeMenu(menu); }