早速のご返答ありがとうございます。
Rectangle.IntersectsWithと書いてしまいましたがSystem.Windows.Rect.IntersectsWithが正解のようです。すみません。
System.Windows.Media.VisualTreeHelperについて調べてみようと思います。
現状テスト用で利用しているソースは以下の通りです。
XAML:
<Window x:Class="RectSelection.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:RectSelection"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525"
PreviewMouseLeftButtonDown="Window_PreviewMouseLeftButtonDown"
PreviewMouseLeftButtonUp="Window_PreviewMouseLeftButtonUp"
MouseMove="Window_MouseMove">
<Grid>
<Grid x:Name="MainGrid">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<ToggleButton Grid.Column="0" Grid.Row="0" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="1" Grid.Row="0" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="2" Grid.Row="0" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="3" Grid.Row="0" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="0" Grid.Row="1" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="1" Grid.Row="1" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="2" Grid.Row="1" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="3" Grid.Row="1" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="0" Grid.Row="2" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="1" Grid.Row="2" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="2" Grid.Row="2" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="3" Grid.Row="2" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="0" Grid.Row="3" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="1" Grid.Row="3" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="2" Grid.Row="3" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
<ToggleButton Grid.Column="3" Grid.Row="3" Content="Button" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="10"/>
</Grid>
<Rectangle Name="SelectionRect" HorizontalAlignment="Left" VerticalAlignment="Top"
StrokeDashArray="2,2" Stroke="LightGray" StrokeThickness="1" Visibility="Collapsed"/>
</Grid>
</Window>
C#:
using System;
using System.Windows;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
namespace RectSelection
{
/// <summary>
/// MainWindow.xaml の相互作用ロジック
/// </summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private Point _DownedPoint = new Point();
private void Window_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
_DownedPoint = Mouse.GetPosition(this);
this.SelectionRect.Margin = new Thickness(_DownedPoint.X, _DownedPoint.Y, 0, 0);
this.SelectionRect.Width = 0;
this.SelectionRect.Height = 0;
this.SelectionRect.Visibility = Visibility.Visible;
}
private void Window_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
Point selectionPoint = this.SelectionRect.PointToScreen(new Point(this.Left, this.Top));
Rect selectionRect = new Rect(selectionPoint.X, selectionPoint.Y,
this.SelectionRect.ActualWidth, this.SelectionRect.ActualHeight);
foreach (var child in LogicalTreeHelper.GetChildren(MainGrid))
{
if (child is ToggleButton)
{
ToggleButton button = child as ToggleButton;
Point controlPoint = button.PointToScreen(new Point(this.Left, this.Top));
Rect clientRect = new Rect(controlPoint.X, controlPoint.Y, button.ActualWidth, button.ActualHeight);
if (selectionRect.IntersectsWith(clientRect))
{
button.IsChecked = true;
}
else
{
button.IsChecked = false;
}
}
}
this.SelectionRect.Width = 0;
this.SelectionRect.Height = 0;
this.SelectionRect.Visibility = Visibility.Hidden;
}
private void Window_MouseMove(object sender, MouseEventArgs e)
{
Point p = Mouse.GetPosition(this);
if (!_DownedPoint.Equals(p))
{
if (p.X - _DownedPoint.X >= 0 && p.Y - _DownedPoint.Y >= 0)
{
this.SelectionRect.Margin = new Thickness(_DownedPoint.X, _DownedPoint.Y, 0, 0);
this.SelectionRect.Width = p.X - _DownedPoint.X;
this.SelectionRect.Height = p.Y - _DownedPoint.Y;
}
else if (p.X - _DownedPoint.X < 0 && p.Y - _DownedPoint.Y >= 0)
{
this.SelectionRect.Margin = new Thickness(p.X, _DownedPoint.Y, 0, 0);
this.SelectionRect.Width = _DownedPoint.X - p.X;
this.SelectionRect.Height = p.Y - _DownedPoint.Y;
}
else if (p.X - _DownedPoint.X >= 0 && p.Y - _DownedPoint.Y < 0)
{
this.SelectionRect.Margin = new Thickness(_DownedPoint.X, p.Y, 0, 0);
this.SelectionRect.Width = p.X - _DownedPoint.X;
this.SelectionRect.Height = _DownedPoint.Y - p.Y;
}
else if (p.X - _DownedPoint.X < 0 && p.Y - _DownedPoint.Y < 0)
{
this.SelectionRect.Margin = new Thickness(p.X, p.Y, 0, 0);
this.SelectionRect.Width = Math.Abs(_DownedPoint.X - p.X);
this.SelectionRect.Height = Math.Abs(_DownedPoint.Y - p.Y);
}
}
}
}
}
以上、よろしくお願い致します。
Shigehiro Mori
