// Copyright (c) AlphaSierraPapa for the SharpDevelop Team (for details please see \doc\copyright.txt)
// This code is distributed under the GNU LGPL (for details please see \doc\license.txt)
using System;
using System.Windows;
using System.Windows.Controls;
using Tango.Scripting.Editors.Editing;
using Tango.Scripting.Editors.Utils;
namespace Tango.Scripting.Editors.CodeCompletion
{
/// <summary>
/// A popup-like window that is attached to a text segment.
/// </summary>
public class InsightWindow : CompletionWindowBase
{
static InsightWindow()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(InsightWindow),
new FrameworkPropertyMetadata(typeof(InsightWindow)));
AllowsTransparencyProperty.OverrideMetadata(typeof(InsightWindow),
new FrameworkPropertyMetadata(Boxes.True));
}
/// <summary>
/// Creates a new InsightWindow.
/// </summary>
public InsightWindow(TextArea textArea) : base(textArea)
{
this.CloseAutomatically = true;
AttachEvents();
}
/// <inheritdoc/>
protected override void OnSourceInitialized(EventArgs e)
{
base.OnSourceInitialized(e);
Rect caret = this.TextArea.Caret.CalculateCaretRectangle();
Point pointOnScreen = this.TextArea.TextView.PointToScreen(caret.Location - this.TextArea.TextView.ScrollOffset);
Rect workingArea = System.Windows.Forms.Screen.FromPoint(pointOnScreen.ToSystemDrawing()).WorkingArea.ToWpf().TransformFromDevice(this);
MaxHeight = workingArea.Height;
MaxWidth = Math.Min(workingArea.Width, Math.Max(1000, workingArea.Width * 0.6));
}
/// <summary>
/// Gets/Sets whether the insight window should close automatically.
/// The default value is true.
/// </summary>
public bool CloseAutomatically { get; set; }
/// <inheritdoc/>
protected override bool CloseOnFocusLost {
get { return this.CloseAutomatically; }
}
void AttachEvents()
{
this.TextArea.Caret.PositionChanged += CaretPositionChanged;
}
/// <inheritdoc/>
protected override void DetachEvents()
{
this.TextArea.Caret.PositionChanged -= CaretPositionChanged;
base.DetachEvents();
}
void CaretPositionChanged(object sender, EventArgs e)
{
if (this.CloseAutomatically) {
int offset = this.TextArea.Caret.Offset;
if (offset < this.StartOffset || offset > this.EndOffset) {
Close();
}
}
}
}
/// <summary>
/// TemplateSelector for InsightWindow to replace plain string content by a TextBlock with TextWrapping.
/// </summary>
internal sealed class InsightWindowTemplateSelector : DataTemplateSelector
{
public override DataTemplate SelectTemplate(object item, DependencyObject container)
{
if (item is string)
return (DataTemplate)((FrameworkElement)container).FindResource("TextBlockTemplate");
return null;
}
}
}
