wpf-controls | 易学教程

ListView ItemContainerStyle Template

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问题 I created style to be used as my ListView's item template that contains a CheckBox and a TextBlock: <Style x:Key="CheckBoxListStyle" TargetType="{x:Type ListView}"> <Setter Property="SelectionMode" Value="Multiple"></Setter> <Setter Property="ItemContainerStyle"> <Setter.Value> <Style TargetType="{x:Type ListViewItem}" > <Setter Property="Template"> ... The checkbox in the template is bound to the IsSelected property of the list view item: <CheckBox x:Name="itemCheckBox" Width="13" Height="13

Volume Slider CustomControl

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问题 i searched the last hours for a customcontrol that looks like this: http://i1-scripts.softpedia-static.com/screenshots/Volume-Slider-10188.png It's like a simple slider, but this growing size to the right side is my problem. I don't know how to do this. Have anyone an idea? greetings 回答1: You can define a geometry that has the shape of a triangle and use that as a OpacityMask of the Track . The Track has a repeat button on the left to decrease the value and on the right to increase it. You

WPF custom control and direct content support

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问题 I am fairly new to WPF, and am a bit stuck, so any help would be appreciated. I am trying to write WPF custom control that encapsulates several elements of functionality that I already having working (i.e sorting, filtering, standard menus, etc.), but in a nice neat package to avoid repetition. Anyway I have created the custom control (based on control), and then have the following in the Generic.Xaml <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns

Changing dynamically created button's background in WPF

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I have the following code to dynamically create and add a button to a panel: StackPanel topPanel=...; Button button=new Button(); button.Content="New Button "+topPanel.Children.Count; // Set button background to a red/yellow linear gradient // Create a default background brush var bgBrush=new LinearGradientBrush(new GradientStopCollection( new GradientStop[] {new GradientStop(Color.FromRgb(255,255,200),0.5), new GradientStop(Color.FromRgb(255,200,200),0.5)})); // Create a more intense mouse over background brush var bgMouseOverBrush=new LinearGradientBrush(new GradientStopCollection( new

Get element that stole focus before it does in WPF

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问题 To be clearer. I need to know which element stole focus in the focused element LostFocus event. Something like this: I have 3 buttons: A, B and C "Button A" has focus "Button C" is clicked "Button A" LostFocus event is triggered In there I want to know that "Button C" stole the focus (Could've also been "Button B") Let me know if there's a way to accomplish this. Thanks! 回答1: You can always check the FocusManager.GetFocusedElement(dObj) to get the focused element within a given

Passing WPF user control selection to host control

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问题 I have a WPF user control with a list box. I want to pass the selected item in the list box to the calling control through binding. How can I achieve this? 回答1: You can expose a new property for SelectedItem on your user control and bind it to the child control ListBox. Code for your user control (I inherited from Control though): public class CustomListControl : Control { static CustomListControl() { DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomListControl), new

Simple WPF page selection for multipaged tiff

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问题 I am making a basic Tiff viewer and need to be able to select the page to be viewed. In Winforms I could use selectActiveFrame, so I was wondering if there is a WPF equivalent for this. Thanks! EDIT: In winforms I used System.Drawing.Imaging.FrameDimension in the selectActiveFrame method if that helps at all. 回答1: You can use the TiffBitmapDecoder class to load the image and then use the Frames property to access which tiff frame you like. 来源： https://stackoverflow.com/questions/4546994

How can I make a Rectangle on a canvas which is draggable?

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问题 I have these three functions to trigger the events. I already have a static version of my needs, but I need a dynamically version of it. bool captured = false; double x_shape, x_canvas, y_shape, y_canvas; UIElement source = null; private void MouseLeftButtonDown(object sender, MouseButtonEventArgs e) { source = (UIElement)sender; Mouse.Capture(source); captured = true; x_shape = Canvas.GetLeft(source); x_canvas = e.GetPosition(canvasPreview).X; y_shape = Canvas.GetTop(source); y_canvas = e

What's the easiest way to create a WPF progress bar without the dashed style?

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问题 I'm looking to create a progress bar that doesn't use the WPF default style, which uses a dashed display. All I want is a simple, "smooth style" progress bar. In other words, I don't want to progress bar to be dashed. I want it to use a solid colored bar. What's the easiest way to do this? I assumed this would be part of the default API but I haven't been successful playing with it so far. Among other things, I've attempted to set the foreground brush, which only give me the color, not the

WPF Style for Control Library

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问题 I have a library ( Styles.DLL ) which contains a collection of keyed WPF Styles . I have a class library ( Module.DLL ) which contains a number of Windows and UserControls which can be shared across various applications. I use the keyed Styles defined in Styles.DLL to create implicit Styles for the various Controls used on these Windows and UserControls e.g. Button or ComboBox . I then have an application ( App.EXE ) in which I use the Windows defined in Module.DLL . I merge the required