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Enable auto scroll when selection changed in RichTextBox

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This commit is contained in:
leo 2020-07-17 17:59:12 +08:00
parent 4680608845
commit ab9b89b4cc
4 changed files with 66 additions and 1 deletions
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36
SourceGit/UI/DiffViewer.xaml.cs
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@ -268,17 +268,53 @@ namespace SourceGit.UI {
e.Handled = true;
}
/// <summary>
/// Fix document size for left side.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void LeftSizeChanged(object sender, SizeChangedEventArgs e) {
if (leftText.Document.PageWidth < leftText.ActualWidth) {
leftText.Document.PageWidth = leftText.ActualWidth;
}
}
/// <summary>
/// Fix document size for right side.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RightSizeChanged(object sender, SizeChangedEventArgs e) {
if (rightText.Document.PageWidth < rightText.ActualWidth) {
rightText.Document.PageWidth = rightText.ActualWidth;
}
}
/// <summary>
/// Auto scroll when selection changed.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnViewerSelectionChanged(object sender, RoutedEventArgs e) {
var doc = sender as RichTextBox;
if (doc == null || doc.IsFocused == false) return;
if (Mouse.LeftButton == MouseButtonState.Pressed && !doc.Selection.IsEmpty) {
var p = Mouse.GetPosition(doc);
if (p.X <= 8) {
doc.LineLeft();
} else if (p.X >= doc.ActualWidth - 8) {
doc.LineRight();
}
if (p.Y <= 8) {
doc.LineUp();
} else if (p.Y >= doc.ActualHeight - 8) {
doc.LineDown();
}
}
}
#endregion
}
}