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POIncreasing or decreasing control fontsize on runtime according to Slider(WPF component) value
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  1. POIncreasing or decreasing control fontsize on runtime according to Slider(WPF component) value
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    copied!<p>I want to increase or decrease font size of controls such as window, treeView, ribbon menu etc that are contained by main window.</p> <p>I have a font size slider create method and I want to acces all of Control and TextBlock by using visualtree helper and increase or decrease their font size according to slider value.</p> <p>Methods are below;</p> <pre><code> private StackPanel CreateFontSizeSlider() { StackPanel fontSizePanel = new StackPanel(); fontSizePanel.Orientation = Orientation.Horizontal; Slider fontSizeSlider = new Slider(); fontSizeSlider.Minimum = -3; fontSizeSlider.Maximum = 5; fontSizeSlider.Value = 0; fontSizeSlider.Orientation = Orientation.Horizontal; fontSizeSlider.TickPlacement = System.Windows.Controls.Primitives.TickPlacement.TopLeft; fontSizeSlider.IsSnapToTickEnabled = true; fontSizeSlider.ValueChanged += new RoutedPropertyChangedEventHandler&lt;double&gt;(fontSizeSlider_ValueChanged); fontSizeSlider.Width = 150; fontSizePanel.Children.Add(fontSizeSlider); return fontSizePanel; } public static void ChangeControlsFontSize(DependencyObject dependencyObject, double value) { foreach (DependencyObject childItem in GetChildren(dependencyObject)) { if (childItem is Control) { Control control = childItem as Control; control.FontSize = control.FontSize + value; } else if (childItem is TextBlock) { ((TextBlock)childItem).FontSize = ((TextBlock)childItem).FontSize + value; } ChangeControlsFontSize(childItem, value); } } private static IEnumerable&lt;DependencyObject&gt; GetChildren(DependencyObject reference) { int childCount = VisualTreeHelper.GetChildrenCount(reference); for (int i = 0; i &lt; childCount; i++) { yield return VisualTreeHelper.GetChild(reference, i); } } private void fontSizeSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs&lt;double&gt; e) { ChangeControlsFontSize(this, e.NewValue - e.OldValue); } </code></pre> <p>There are some problems;</p> <p>Firstly I can not acces all controls by walking visual tree. For example I cannot acces closed ribbon menu items. So I can not change their fonts.</p> <p>Secondly some controls contain another controls so I increase or decrease control font size twice.</p> <p>Is there any solution for these proplems or is there another way to do this ? Could you help me please ? </p>
 

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