void ForegroundOnSelectionChanged(object sender, SelectionChangedEventArgs args)
{
ColorGridBox clrbox = args.Source as ColorGridBox;
this.txtbox.Selection.ApplyPropertyValue(FlowDocument.ForegroundProperty, clrbox.SelectedValue);
}
void AddCharToolBar(ToolBarTray tray, int band, int index)
{
ToolBar toolbar = new ToolBar();
toolbar.Band = band;
toolbar.BandIndex = index;
tray.ToolBars.Add(toolbar);
comboFamily = new ComboBox();
comboFamily.Width = 144;
comboFamily.ItemsSource = Fonts.SystemFontFamilies; //系统的系列字体
comboFamily.SelectedItem = this.txtbox.FontFamily;
comboFamily.SelectionChanged += FamilyComboOnSelection;
toolbar.Items.Add(comboFamily);
ToolTip tip = new ToolTip();
tip.Content = "Font Family";
comboFamily.ToolTip = tip;
comboSize = new ComboBox();
comboSize.Width = 72;
comboSize.IsEditable = true;
comboSize.StaysOpenOnEdit = true;
comboSize.IsTextSearchEnabled = false; //关闭文本搜索，防止在输入文本时自动匹配触发SelectionChanged事件
comboSize.Text = (0.75 * this.txtbox.FontSize).ToString();
comboSize.ItemsSource = new double[] { 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72 };
comboSize.SelectionChanged += SizeComboOnSelection;
comboSize.GotKeyboardFocus += SizeComboOnGotFocus;
comboSize.LostKeyboardFocus += SizeComboOnLostFocus;
comboSize.PreviewKeyDown += SizeComboOnKeyDowm;
toolbar.Items.Add(comboSize);
tip = new ToolTip();
tip.Content = "Font Size";
comboSize.ToolTip = tip;
btnBold = new ToggleButton();
btnBold.Checked += BoldButtonOnChecked;
btnBold.Unchecked += BoldButtonOnChecked;
toolbar.Items.Add(btnBold);
Image img = new Image();
img.Source = new BitmapImage(new Uri("pack://application:,,/Images/bold.png"));
img.Stretch = Stretch.None;
btnBold.Content = img;
tip = new ToolTip();
tip.Content = "Bold";
btnBold.ToolTip = tip;
btnItalic = new ToggleButton();
btnItalic.Checked += ItalicButtonOnChecked;
btnItalic.Unchecked += ItalicButtonOnChecked;
toolbar.Items.Add(btnItalic);
img = new Image();
img.Source = new BitmapImage(new Uri("pack://application:,,/Images/italic.png"));
img.Stretch = Stretch.None;
btnItalic.Content = img;
tip = new ToolTip();
tip.Content = "Italic";
btnItalic.ToolTip = tip;
toolbar.Items.Add(new Separator());
Menu menu = new Menu();
toolbar.Items.Add(menu);
MenuItem item = new MenuItem();
menu.Items.Add(item);
img = new Image();
img.Source = new BitmapImage(new Uri("pack://application:,,/Images/color_back.png"));
img.Stretch = Stretch.None;
item.Header = img;
clrboxBackground = new ColorGridBox();
clrboxBackground.SelectionChanged += BackgroundOnSelectionChanged;
item.Items.Add(clrboxBackground);
tip = new ToolTip();
tip.Content = "Background Color";
item.ToolTip = tip;
item = new MenuItem();
menu.Items.Add(item);
img = new Image();
img.Source = new BitmapImage(new Uri("pack://application:,,/Images/color_fore.png"));
img.Stretch = Stretch.None;
item.Header = img;
clrboxForeground = new ColorGridBox();
clrboxForeground.SelectionChanged += ForegroundOnSelectionChanged;
item.Items.Add(clrboxForeground);
tip = new ToolTip();
tip.Content = "Foreground Color";
item.ToolTip = tip;
this.txtbox.SelectionChanged += TextBoxOnSelectionChanged; //选择文字时，更新工具栏信息
}
