/// <summary>
/// Restore selection to its state before change.
/// </summary>
public override void Undo(DrawingCanvas drawingCanvas)
{
// Replace all objects in the list with objects from listBefore
ReplaceObjects(drawingCanvas.GraphicsList, listBefore);
drawingCanvas.RefreshClip();
}
/// <summary>
/// Delete objects again.
/// </summary>
public override void Redo(DrawingCanvas drawingCanvas)
{
// Delete from list all objects kept in cloneList.
// Use object IDs for deleting, don't beleive to objects order.
int n = drawingCanvas.GraphicsList.Count;
for (int i = n - 1; i >= 0; i--)
{
bool toDelete = false;
GraphicsBase currentObject = (GraphicsBase)drawingCanvas.GraphicsList[i];
foreach (PropertiesGraphicsBase o in cloneList)
{
if (o.ID == currentObject.Id)
{
toDelete = true;
break;
}
}
if (toDelete)
{
drawingCanvas.GraphicsList.RemoveAt(i);
}
}
}
/// <summary>
/// Apply new font family
/// </summary>
public static bool ApplyFontFamily(DrawingCanvas drawingCanvas, string value, bool addToHistory)
{
CommandChangeState command = new CommandChangeState(drawingCanvas);
bool wasChange = false;
foreach (GraphicsBase g in drawingCanvas.Selection)
{
GraphicsText gt = g as GraphicsText;
if (gt != null)
{
if (gt.TextFontFamilyName != value)
{
gt.TextFontFamilyName = value;
wasChange = true;
}
}
}
if (wasChange && addToHistory )
{
command.NewState(drawingCanvas);
drawingCanvas.AddCommandToHistory(command);
}
return wasChange;
}
/// <summary>
/// Restore deleted objects
/// </summary>
public override void Undo(DrawingCanvas drawingCanvas)
{
// Insert all objects from cloneList to GraphicsList
int currentIndex = 0;
int indexToInsert;
foreach (PropertiesGraphicsBase o in cloneList)
{
indexToInsert = indexes[currentIndex];
if ( indexToInsert >=0 && indexToInsert <= drawingCanvas.GraphicsList.Count ) // "<=" is correct !
{
drawingCanvas.GraphicsList.Insert(indexToInsert, o.CreateGraphics());
}
else
{
// Bug: we should not be here.
// Add to the end anyway.
drawingCanvas.GraphicsList.Add(o.CreateGraphics());
System.Diagnostics.Trace.WriteLine("CommandDelete.Undo - incorrect index");
}
currentIndex++;
}
drawingCanvas.RefreshClip();
}
/// <summary>
/// Add all deleted objects to GraphicsList
/// </summary>
public override void Undo(DrawingCanvas drawingCanvas)
{
foreach (PropertiesGraphicsBase o in cloneList)
{
drawingCanvas.GraphicsList.Add(o.CreateGraphics());
}
drawingCanvas.RefreshClip();
}
/// <summary>
/// Add change to history.
/// Called after finishing moving/resizing.
/// </summary>
public void AddChangeToHistory(DrawingCanvas drawingCanvas)
{
if (commandChangeState != null && wasMove)
{
// Keep state after moving/resizing and add command to history
commandChangeState.NewState(drawingCanvas);
drawingCanvas.AddCommandToHistory(commandChangeState);
commandChangeState = null;
}
}
// Create this command BEFORE applying Delete All function.
public CommandDeleteAll(DrawingCanvas drawingCanvas)
{
cloneList = new List<PropertiesGraphicsBase>();
// Make clone of the whole list.
foreach(GraphicsBase g in drawingCanvas.GraphicsList)
{
cloneList.Add(g.CreateSerializedObject());
}
}
/// <summary>
/// Add new object to drawing canvas.
/// Function is called when user left-clicks drawing canvas,
/// and one of ToolObject-derived tools is active.
/// </summary>
protected static void AddNewObject(DrawingCanvas drawingCanvas, GraphicsBase o)
{
HelperFunctions.UnselectAll(drawingCanvas);
o.IsSelected = true;
drawingCanvas.SelectedObject = o;
o.Clip = new RectangleGeometry(new Rect(0, 0, drawingCanvas.ActualWidth, drawingCanvas.ActualHeight));
drawingCanvas.GraphicsList.Add(o);
drawingCanvas.CaptureMouse();
}
/// <summary>
/// Add object again
/// </summary>
public override void Redo(DrawingCanvas drawingCanvas)
{
HelperFunctions.UnselectAll(drawingCanvas);
// Create full object from the clone and add it to list
drawingCanvas.GraphicsList.Add(newObjectClone.CreateGraphics());
// Object created from the clone doesn't contain clip information,
// refresh it.
drawingCanvas.RefreshClip();
}
/// <summary>
/// Left mouse is released.
/// New object is created and resized.
/// </summary>
public override void OnMouseUp(DrawingCanvas drawingCanvas, MouseButtonEventArgs e)
{
if (drawingCanvas.Count > 0)
{
drawingCanvas[drawingCanvas.Count - 1].Normalize();
drawingCanvas.AddCommandToHistory(new CommandAdd(drawingCanvas[drawingCanvas.Count - 1]));
}
//drawingCanvas.Tool = ToolType.Pointer;
drawingCanvas.Cursor = HelperFunctions.DefaultCursor;
drawingCanvas.ReleaseMouseCapture();
}
/// <summary>
/// Create new TableBlock
/// </summary>
public override void OnMouseDown(DrawingCanvas drawingCanvas, MouseButtonEventArgs e)
{
Point p = e.GetPosition(drawingCanvas);
AddNewObject(drawingCanvas,
new GraphicsTableBlock(
p.X,
p.Y,
p.X + 1,
p.Y + 1,
drawingCanvas.LineWidth,
drawingCanvas.ObjectColor,
drawingCanvas.ActualScale));
}
/// <summary>
/// Set cursor and resize new polyline
/// </summary>
public override void OnMouseMove(DrawingCanvas drawingCanvas, MouseEventArgs e)
{
drawingCanvas.Cursor = ToolCursor;
if (e.LeftButton == MouseButtonState.Pressed)
{
if (drawingCanvas.IsMouseCaptured)
{
if (drawingCanvas.Count > 0)
{
drawingCanvas[drawingCanvas.Count - 1].MoveTo(e.GetPosition(drawingCanvas));
}
}
}
}
List<int> indexes; // contains indexes of deleted items
#endregion Fields
#region Constructors
// Create this command BEFORE applying Delete function.
public CommandDelete(DrawingCanvas drawingCanvas)
{
cloneList = new List<PropertiesGraphicsBase>();
indexes = new List<int>();
// Make clone of the list selection.
int currentIndex = 0;
foreach (GraphicsBase g in drawingCanvas.Selection)
{
cloneList.Add(g.CreateSerializedObject());
indexes.Add(currentIndex);
currentIndex++;
}
}
/// <summary>
/// Create textbox for in-place editing
/// </summary>
public void CreateTextBox(GraphicsText graphicsText, DrawingCanvas drawingCanvas)
{
graphicsText.IsSelected = false; // selection marks don't look good with textbox
// Keep old text in the case Esc is pressed while editing
oldText = graphicsText.Text;
// Keep reference to edited object
editedGraphicsText = graphicsText;
textBox = new TextBox();
textBox.Width = graphicsText.Rectangle.Width;
textBox.Height = graphicsText.Rectangle.Height;
textBox.FontFamily = new FontFamily(graphicsText.TextFontFamilyName);
textBox.FontSize = graphicsText.TextFontSize;
textBox.FontStretch = graphicsText.TextFontStretch;
textBox.FontStyle = graphicsText.TextFontStyle;
textBox.FontWeight = graphicsText.TextFontWeight;
textBox.Text = graphicsText.Text;
textBox.AcceptsReturn = true;
textBox.TextWrapping = TextWrapping.Wrap;
drawingCanvas.Children.Add(textBox);
Canvas.SetLeft(textBox, graphicsText.Rectangle.Left);
Canvas.SetTop(textBox, graphicsText.Rectangle.Top);
textBox.Width = textBox.Width;
textBox.Height = textBox.Height;
textBox.Focus();
textBox.LostFocus += new RoutedEventHandler(textBox_LostFocus);
textBox.LostKeyboardFocus += new KeyboardFocusChangedEventHandler(textBox_LostKeyboardFocus);
textBox.PreviewKeyDown += new KeyEventHandler(textBox_PreviewKeyDown);
textBox.ContextMenu = null; // see notes in textBox_LostKeyboardFocus
// Initially textbox is set to the same rectangle as graphicsText.
// After textbox loading its template is available, and we can
// correct textbox position - see details in the textBox_Loaded function.
textBox.Loaded += new RoutedEventHandler(textBox_Loaded);
}
/// <summary>
/// Delete added object
/// </summary>
public override void Undo(DrawingCanvas drawingCanvas)
{
// Find object to delete by its ID.
// Don't use objects order in the list.
GraphicsBase objectToDelete = null;
// Remove object from the list
foreach(GraphicsBase b in drawingCanvas.GraphicsList)
{
if ( b.Id == newObjectClone.ID )
{
objectToDelete = b;
break;
}
}
if ( objectToDelete != null )
{
drawingCanvas.GraphicsList.Remove(objectToDelete);
}
}
/// <summary>
/// Apply new color
/// </summary>
public static bool ApplyColor(DrawingCanvas drawingCanvas, Color value, bool addToHistory)
{
CommandChangeState command = new CommandChangeState(drawingCanvas);
bool wasChange = false;
foreach (GraphicsBase g in drawingCanvas.Selection)
{
if (g.ObjectColor != value)
{
g.ObjectColor = value;
wasChange = true;
}
}
if ( wasChange && addToHistory )
{
command.NewState(drawingCanvas);
drawingCanvas.AddCommandToHistory(command);
}
return wasChange;
}
/// <summary>
/// Set cursor
/// </summary>
public override void SetCursor(DrawingCanvas drawingCanvas)
{
drawingCanvas.Cursor = this.toolCursor;
}
public abstract void OnMouseMove(DrawingCanvas drawingCanvas, MouseEventArgs e);
public abstract void OnMouseUp(DrawingCanvas drawingCanvas, MouseButtonEventArgs e);
// Call this function AFTER operation.
public void NewState(DrawingCanvas drawingCanvas)
{
// Keep objects state after operation.
FillList(drawingCanvas.GraphicsList, ref listAfter);
}
// Create this command BEFORE operation.
public CommandChangeOrder(DrawingCanvas drawingCanvas)
{
FillList(drawingCanvas.GraphicsList, ref listBefore);
}
public abstract void SetCursor(DrawingCanvas drawingCanvas);
/// <summary>
/// Restore order to its state after change.
/// </summary>
public override void Redo(DrawingCanvas drawingCanvas)
{
ChangeOrder(drawingCanvas.GraphicsList, listAfter);
}
/// <summary>
/// Detete All again
/// </summary>
public override void Redo(DrawingCanvas drawingCanvas)
{
drawingCanvas.GraphicsList.Clear();
}
/// <summary>
/// Left mouse is released.
/// New object is created and resized.
/// </summary>
public override void OnMouseUp(DrawingCanvas drawingCanvas, MouseButtonEventArgs e)
{
drawingCanvas.Tool = ToolType.Pointer;
drawingCanvas.Cursor = HelperFunctions.DefaultCursor;
drawingCanvas.ReleaseMouseCapture();
if (drawingCanvas.Count > 0)
{
drawingCanvas[drawingCanvas.Count - 1].Normalize();
GraphicsText t = drawingCanvas[drawingCanvas.Count - 1] as GraphicsText;
if ( t != null )
{
// Create textbox for editing of graphics object which is just created
CreateTextBox(t, drawingCanvas);
}
}
// Commnnd will be added to History later, after closing
// in-place textbox.
}
public ToolText(DrawingCanvas drawingCanvas)
{
this.drawingCanvas = drawingCanvas;
MemoryStream stream = new MemoryStream(Properties.Resources.Text);
ToolCursor = new Cursor(stream);
}
// Call this function AFTER operation.
public void NewState(DrawingCanvas drawingCanvas)
{
FillList(drawingCanvas.GraphicsList, ref listAfter);
}
// Create this command BEFORE operation.
public CommandChangeState(DrawingCanvas drawingCanvas)
{
// Keep objects state before operation.
FillList(drawingCanvas.GraphicsList, ref listBefore);
}
/// <summary>
/// Restore order to its state before change.
/// </summary>
public override void Undo(DrawingCanvas drawingCanvas)
{
ChangeOrder(drawingCanvas.GraphicsList, listBefore);
}
/// <summary>
/// Create new text object
/// </summary>
public override void OnMouseDown(DrawingCanvas drawingCanvas, MouseButtonEventArgs e)
{
Point p = e.GetPosition(drawingCanvas);
AddNewObject(drawingCanvas,
new GraphicsText(
String.Empty,
p.X,
p.Y,
p.X + 1,
p.Y + 1,
drawingCanvas.ObjectColor,
drawingCanvas.TextFontSize,
drawingCanvas.TextFontFamilyName,
drawingCanvas.TextFontStyle,
drawingCanvas.TextFontWeight,
drawingCanvas.TextFontStretch,
drawingCanvas.ActualScale));
}
