xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:WpfApplication1="clr-namespace:WpfApplication1;assembly="
Title="WPF" Height="300" Width="300" >
ScaleY="{Binding Path=Value, ElementName=zoomSlider}"/>
//File:Window.xaml.cs
using System.Windows;
using System;
using System.Windows;
using System.Windows.Controls;
namespace WpfApplication1
{
public partial class Window1 : Window
{
public Window1()
{
InitializeComponent();
}
}
public class ZoomableCanvasControl : Canvas
{
static ZoomableCanvasControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(ZoomableCanvasControl),new FrameworkPropertyMetadata(typeof(ZoomableCanvasControl)));
}
protected override Size MeasureOverride(Size constraint)
{
double bottomMost = 0d;
double rightMost = 0d;
foreach(object obj in Children)
{
FrameworkElement child = obj as FrameworkElement;
if(child != null)
{
child.Measure(constraint);
bottomMost = Math.Max(bottomMost,GetTop(child) +child.DesiredSize.Height);
rightMost = Math.Max(rightMost,GetLeft(child) +child.DesiredSize.Width);
}
}
return new Size(rightMost, bottomMost);
}
}
}