C# WPF自制簡單的批注工具
在教學(xué)和演示中,我們通常需要對重點進行批注,下載安裝第三方工具批注顯得很麻煩。本篇使用WPF開發(fā)了一個批注工具,工具小巧,功能豐富,非常使用日常免費使用,或者進行再次開發(fā)。
自制批注工具具有以下功能特點:
支持圖畫,擦除,撤銷,恢復(fù),改變畫板顏色功能
提供顏色選擇和線條大小設(shè)置功能
方便演示教學(xué)
示例代碼如下:
Stack<StrokeCollection> undoStack = new Stack<StrokeCollection>();//撤銷 Stack<StrokeCollection> recoverStack = new Stack<StrokeCollection>();//恢復(fù)撤銷 public MainWindow() { InitializeComponent(); try { EraserCanvas.MouseDown += EraserCanvas_MouseDown; EraserCanvas.MouseMove += EraserCanvas_MouseMove; EraserCanvas.MouseUp += EraserCanvas_MouseUp; Global.Instance.CurrentCanvas.PreviewMouseDown += WriteBorad_PreviewMouseDown; InkCanvasRootPanel.Children.Clear(); InkCanvasRootPanel.Children.Add(Global.Instance.CurrentCanvas); } catch (Exception) { } } private void Window_Loaded(object sender, RoutedEventArgs e) { //設(shè)置色板和清空橡皮位置 Window window = Window.GetWindow(rdoPen); Point point = rdoPen.TransformToAncestor(window).Transform(new Point(0, 0)); translateColor.X = translateColor.X - 100; translateEraser.X = translateEraser.X-30; if (rdoPenWidthMin.Content.ToString() == Global.Instance.ColorHelper.selectedPenWidth.Trim()) rdoPenWidthMin.IsChecked = true; else if (rdoPenWidthMedium.Content.ToString() == Global.Instance.ColorHelper.selectedPenWidth.Trim()) rdoPenWidthMedium.IsChecked = true; else if (rdoPenWidthMax.Content.ToString() == Global.Instance.ColorHelper.selectedPenWidth.Trim()) rdoPenWidthMax.IsChecked = true; //初始化色板 foreach (string color in Global.Instance.ColorHelper.colorList) { RadioButton btntemp = new RadioButton(); btntemp.SetResourceReference(StyleProperty, "ColorSelectStyle"); btntemp.Width = 30; btntemp.Height = 30; btntemp.Margin = new Thickness(2, 2, 2, 0); btntemp.Background = new SolidColorBrush((System.Windows.Media.Color)ColorConverter.ConvertFromString(color)); if (btntemp.Background.ToString() == Global.Instance.ColorHelper.selectedColor) { btntemp.IsChecked = true; Global.Instance.CurrentCanvas.DefaultDrawingAttributes.Color =(System.Windows.Media.Color)ColorConverter.ConvertFromString((string)Global.Instance.ColorHelper.selectedColor); } uniformColor.Children.Add(btntemp); } } #region InkCanvas操作 bool transformColorFlag = false; bool transformEraserClearFlag = false; private void RadioButton_Click(object sender, RoutedEventArgs e) { //橡皮模式下選擇其他工具關(guān)閉橡皮擦功能 EraserCanvas.Visibility = Visibility.Collapsed; _eraserisDown = false; //如果色板打開下選擇其他工具,隱藏色板工具 if (!(bool)rdoPen.IsChecked) { transformColorFlag = false; translateColor.Y = 300; } if (!(bool)rdoEraser.IsChecked) { transformEraserClearFlag = false; translateEraser.Y = 100; } if ((sender as RadioButton).Content.ToString() == "畫筆") { //Topmost = false; this.Background = (Brush)new BrushConverter().ConvertFromString("#01000000"); if (transformColorFlag) { translateColor.Y = -10; } else { translateColor.Y = 300; } transformColorFlag = !transformColorFlag; Global.Instance.CurrentCanvas.EditingMode = InkCanvasEditingMode.Ink; } else if ((sender as RadioButton).Content.ToString() == "橡皮") { this.Background = (Brush)new BrushConverter().ConvertFromString("#01000000"); if (transformEraserClearFlag) { translateEraser.Y = -10; } else { translateEraser.Y = 100; } transformEraserClearFlag = !transformEraserClearFlag; Global.Instance.CurrentCanvas.EditingMode = InkCanvasEditingMode.None; EraserCanvas.Visibility = Visibility.Visible; TranslateTransform.X = -1000; TranslateTransform.Y = -1000; } else if ((sender as RadioButton).Content.ToString() == "選擇") { //Topmost = true; this.Background = System.Windows.Media.Brushes.Transparent; Global.Instance.CurrentCanvas.EditingMode = InkCanvasEditingMode.None; // Global.Instance.CurrentCanvas.EditingMode = InkCanvasEditingMode.Select; } else if ((sender as RadioButton).Content.ToString() == "撤銷") { if (undoStack.Count > 0) { recoverStack.Push(Global.Instance.CurrentCanvas.Strokes.Clone()); Global.Instance.CurrentCanvas.Strokes = undoStack.Pop(); } } else if ((sender as RadioButton).Content.ToString() == "恢復(fù)") { if (recoverStack.Count > 0) { undoStack.Push( Global.Instance.CurrentCanvas.Strokes.Clone()); Global.Instance.CurrentCanvas.Strokes = recoverStack.Pop(); } } } #endregion
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