グリッパーを作るなら、こんなかんじ。
#こまかいことを実装してる時間がないのでマウスでグリッパーの処理のみです。(本当はAdornerでやるのが理想)
<UserControl x:Class="WpfApplication1.AnchorCaretTextBox"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300">
<UserControl.Resources>
<Style TargetType="Thumb" x:Key="anchor">
<EventSetter Event="DragDelta" Handler="Thumb_DragDelta" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Thumb">
<Grid Canvas.Left="100" Canvas.Top="100">
<Grid.RowDefinitions>
<RowDefinition />
<RowDefinition />
</Grid.RowDefinitions>
<Rectangle Width="2" Height="{Binding FontSize,ElementName=txb}" Fill="Black" />
<Ellipse Grid.Row="1" Width="20" Height="20" Stroke="Black" StrokeThickness="2" Fill="White" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</UserControl.Resources>
<Grid>
<TextBox Text="AAAAAAAAAAAAA" FontSize="30" DockPanel.Dock="Top" AcceptsReturn="true"
CaretBrush="Transparent"
SelectionChanged="TextBox_SelectionChanged"
ScrollViewer.ScrollChanged="TextBox_ScrollChanged"
x:Name="txb">
</TextBox>
<Canvas x:Name="canvas" Visibility="Visible" >
<Thumb Style="{StaticResource anchor}" x:Name="thumbA" />
<Thumb Style="{StaticResource anchor}" x:Name="thumbB" />
</Canvas>
</Grid>
</UserControl>
namespace WpfApplication1
{
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Controls.Primitives;
public partial class AnchorCaretTextBox : UserControl
{
public AnchorCaretTextBox()
{
InitializeComponent();
}
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
thumbStart = thumbA ;
thumbEnd = thumbB;
}
/// <summary>選択範囲が変わったらアンカー用のThumbの位置を移動させる</summary>
private void TextBox_SelectionChanged(object sender, RoutedEventArgs e)
{
TextBox txb = (TextBox)sender;
UpdateThumbPosition(txb);
}
/// <summary>スクロールで選択範囲の描画位置が変わったらThumbを移動させる</summary>
private void TextBox_ScrollChanged(object sender, ScrollChangedEventArgs e)
{
UpdateThumbPosition((TextBox)sender);
}
/// <summary>Thumbを選択範囲に一致させる</summary>
private void UpdateThumbPosition(TextBox txb)
{
Point pStart = txb.GetRectFromCharacterIndex(txb.SelectionStart).Location;
Point pEnd = txb.GetRectFromCharacterIndex(txb.SelectionStart + txb.SelectionLength).Location;
SetCanvas(thumbStart, pStart, true);
SetCanvas(thumbEnd, pEnd, true);
}
private void SetCanvas(Control ctl, Point p, bool isVisible)
{
if (ctl != null)
{
if (isVisible)
{
ctl.Visibility = System.Windows.Visibility.Visible;
if (!double.IsInfinity(p.X))
{
Canvas.SetLeft(ctl, p.X - ctl.ActualWidth / 2);
}
if (!double.IsInfinity(p.Y))
{
Canvas.SetTop(ctl, p.Y);
}
}
else
{
ctl.Visibility = System.Windows.Visibility.Hidden;
}
}
}
/// <summary>Thumbが移動されたらTextBoxの選択範囲を変更する</summary>
private void Thumb_DragDelta(object sender, System.Windows.Controls.Primitives.DragDeltaEventArgs e)
{
Thumb CaretThumb = (Thumb)sender;
Thumb anchorThumb;
var p = Mouse.GetPosition(txb);
if (!isDragging)
{
isDragging = true;
CaretThumb.MouseUp += CaretThumb_MouseUp;
offset = Mouse.GetPosition(CaretThumb).Y / 2;
}
p = new Point(p.X, p.Y - offset);
int caretIndex = txb.GetCharacterIndexFromPoint(p, true);
int anchorIndex;
if (CaretThumb == thumbStart)
{
anchorThumb = thumbEnd;
anchorIndex = txb.SelectionStart + txb.SelectionLength;
}
else
{
anchorThumb = thumbStart;
anchorIndex = txb.SelectionStart;
}
if (caretIndex < anchorIndex)
{
txb.SelectionStart = caretIndex;
txb.SelectionLength = anchorIndex - caretIndex;
thumbStart = CaretThumb;
thumbEnd = anchorThumb;
}
else
{
txb.SelectionStart = anchorIndex;
txb.SelectionLength = caretIndex - anchorIndex;
thumbStart = anchorThumb;
thumbEnd = CaretThumb;
}
}
private void CaretThumb_MouseUp(object sender, MouseButtonEventArgs e)
{
((Thumb)sender).MouseUp -= CaretThumb_MouseUp;
isDragging = false;
}
private Thumb thumbStart;
private Thumb thumbEnd;
private bool isDragging;
private double offset;
}
}
長押ししたらワード単位に選択範囲を広げる処理とグリッパーの表示を切り替える処理を追加してやってください。
ワード選択はRichTextBoxならParagraphなどで文字列をある程度は解析できるので、それでワード単位を解析してやるとか。
個別に明示されていない限りgekkaがフォーラムに投稿したコードにはフォーラム使用条件に基づき「MICROSOFT LIMITED PUBLIC LICENSE」が適用されます。(かなり自由に使ってOK!)
