public virtual void Attach(TextViewer viewer)
{
this.TextViewer = viewer;
this.TextViewer.SelectionChanged -= TextViewer_SelectionChanged;
this.TextViewer.SelectionChanged += TextViewer_SelectionChanged;
SelectionChanged();
}
private void ToggleAttribute <T> (Action <T, bool> toggle, ToolbarButton button) where T : TextAttribute, new()
{
var attr = new T();
var isChecked = button.IsChecked.HasValue && button.IsChecked.Value;
toggle(attr, isChecked);
TextViewer.SetAttribute(attr);
}
public virtual void SelectionChanged()
{
Action <ToolbarButton, Action> changeButton = (b, a) => {
var s = b.Action;
b.Action = null;
a();
b.Action = s;
};
var visit = new TextAttributeVisitor {
FontDataAttribute = attribute => {
if (!string.IsNullOrEmpty(attribute.FontFamily))
{
FontFamilyCombo.SelectedItem = attribute.FontFamily;
}
if (attribute.FontSize > 0)
{
FontSizeCombo.SelectedItem = attribute.FontSize.ToString();
}
},
FontWeightTextAttribute = attribute =>
changeButton(BoldButton, () => BoldButton.IsChecked = attribute.Weight == FontWeight.Bold),
FontStyleTextAttribute = attribute =>
changeButton(ItalicButton, () => ItalicButton.IsChecked = attribute.Style == FontStyle.Italic),
StrikethroughTextAttribute = attribute =>
changeButton(StrikeThroughButton, () => StrikeThroughButton.IsChecked = attribute.Strikethrough),
UnderlineTextAttribute = attribute =>
changeButton(UnderlineButton, () => UnderlineButton.IsChecked = attribute.Underline),
BackgroundTextAttribute = attribute => { },
ColorTextAttribute = attribute => { }
};
visit.Visit(TextViewer.GetAttributes());
}
protected virtual void Compose()
{
BoldButton = new ToolbarButton {
IsCheckable = true
};
BoldCommand = new CommandView {
Action = s => ToggleAttribute <FontWeightTextAttribute> (
(a, bold) => a.Weight = (bold ? FontWeight.Bold : FontWeight.Normal), BoldButton),
Image = Iconery.FontBoldIcon,
Size = DefaultSize,
ToolTipText = "Bold"
};
BoldButton.SetCommand(BoldCommand);
ItalicButton = new ToolbarButton {
IsCheckable = true
};
ItalicCommand = new CommandView {
Action = s => ToggleAttribute <FontStyleTextAttribute> (
(a, italic) => a.Style = (italic ? FontStyle.Italic : FontStyle.Normal), ItalicButton),
Image = Iconery.FontItalicIcon,
Size = DefaultSize,
ToolTipText = "Italic"
};
ItalicButton.SetCommand(ItalicCommand);
StrikeThroughButton = new ToolbarButton {
IsCheckable = true
};
StrikeThroughCommand = new CommandView {
Action = s => ToggleAttribute <StrikethroughTextAttribute> (
(a, value) => a.Strikethrough = value, StrikeThroughButton),
Image = Iconery.FontStrikeThroughIcon,
Size = DefaultSize,
ToolTipText = "StrikeThrough"
};
StrikeThroughButton.SetCommand(StrikeThroughCommand);
UnderlineButton = new ToolbarButton {
IsCheckable = true
};
UnderlineCommand = new CommandView {
Action = s => ToggleAttribute <UnderlineTextAttribute> (
(a, value) => a.Underline = value, UnderlineButton),
Image = Iconery.FontUnderlineIcon,
Size = DefaultSize,
ToolTipText = "Underline"
};
UnderlineButton.SetCommand(UnderlineCommand);
FontFamilyCombo = new ComboBox {
Width = 100
};
Font.AvailableFontFamilies.ForEach(f =>
FontFamilyCombo.Items.Add(f));
FontFamilyCombo.SelectionChanged += (s, e) => {
var attr = new FontDataAttribute {
FontFamily = FontFamilyCombo.SelectedItem as string
};
TextViewer.SetAttribute(attr);
};
var fontFamilyComboHost = new ToolbarItemHost {
Child = FontFamilyCombo
};
FontSizeCombo = new ComboBox {
Width = 50
};
new int[] { 6, 8, 10, 12, 14, 16, 18, 24, 32 }
.ForEach(s => FontSizeCombo.Items.Add(s.ToString()));
FontSizeCombo.SelectionChanged += (s, e) => {
var i = -1d;
if (FontSizeCombo.SelectedItem != null && double.TryParse(FontSizeCombo.SelectedItem.ToString(), out i))
{
var attr = new FontDataAttribute {
FontSize = i
};
TextViewer.SetAttribute(attr);
}
};
var fontSizeComboHost = new ToolbarItemHost {
Child = FontSizeCombo
};
this.AddItems(BoldButton, ItalicButton, UnderlineButton, StrikeThroughButton,
fontFamilyComboHost, fontSizeComboHost);
}