I create my own control to look and act like ComboBox.
Approach A: I create UserControl with ComboBox as a content. It HAS the metro style, it looks perfect. It works. However I have to manually recreate ComboBox properties in my control. A lot of redundant, ugly code.
Approach B: I extend ComboBox control itself, so no extra coding is needed. It works as charm, however - it's a ComboBox with a different name, so it's not targeted with the metro style for ComboBox.
How to make my new derived control use the metro style for ComboBox?
Add an implicit style to your App.xaml file (replace CustomComboBox with the name of your derived class):
<Style TargetType="local:CustomComboBox" BasedOn="{StaticResource MetroComboBox}" />
If you are using the Material Design toolkit, it should be:
<Style TargetType="local:CustomComboBox" BasedOn="{StaticResource MaterialDesignComboBox}" />
Related
My custom control's default style is defined in Generic.xaml and is working fine.
However, when I try to change the style of my custom control the same way as one can with built in controls nothing happens. In App.xaml I am trying to change the default style of my control by doing the following:
<Style TargetType="{x:Type my:CustomControl}">
<Setter Property="Background" Value="Red"/>
</Style>
If I set the x:key property of the above style and reference this style using this key all works fine.
Is it correct that the above styling method only works for built in controls and does not work for custom controls, or am I just doing something wrong? Is there a workable solution to achieve this type of styling for custom controls?
Update
In this situation my custom control is derived from System.Windows.Window.
I finally managed to get implicit styling for my custom control to work. Apparently implicit styling might not work for derived controls as the style is not automatically being applied to the control. In order to achieve this one has to manually set the resource reference. My custom control now looks like this:
public class CustomControl : Window
{
static CustomControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(CustomControl), new FrameworkPropertyMetadata(typeof(CustomControl)));
}
public CustomControl()
{
SetResourceReference(StyleProperty, typeof(CustomControl));
}
}
Yes, you are correct. Generic.xaml is used for custom controls, and App.xaml for application-wide resources (including styles for built-in controls). Specifying TargetType for a custom control in App.xaml will not work. So using explicit styles (with x:Key) seems to be the easiest solution.
Hey, I am creating a Custom Control i WPF inheriting from the ListView. However, I want it to look exactly as the already existing ListView.
Is there a way To use the default ListView Template in a Custom Control without rewriting it in xaml? I do have a Generic.xaml file with the new control added, but I should no need to rewrite the template code.
Thanks
EDIT: I also want to keep it as DRY as possible without repeating (making a mess) the code.
If you subclass the ListView, them your subclassed control will use the ListView Template. That's it! You do not have to do anything!
The Template used by a control is defined by its DefaultStyleKey dependency property. If you want to change the template of your control, set this property as follows:
DefaultStyleKeyProperty.OverrideMetadata(typeof(MyControl),
new FrameworkPropertyMetadata(typeof(MyControl)));
However, if you do not set this property, it will use the value set by the superclass.
I think the problem is that you have used "Add New Item" => "Custom Control" to create you control then changed the class it extends. Instead of doing this, just add a new C# class and extend ListView.
<Style TargetType="{x:Type local:MyControl}" BasedOn={StaticResource {x:Type ListView}}" />
I've create a style for ListItems that I want to use across all ListBoxes in my application. I can set these manually like so:
<ListBox ItemContainerStyle="">
But I'm having trouble getting the style to apply to every single ListBox in my application without touching each one and adding the above attribute.
In addition, and more importantly, I want to apply the style to list boxes used within custom templated controls. Right now I have to modify the Generic.xaml theme in the control library... not something i think I should have to do.
Fairly certain this has something to do with themes, btu having a heck of a time figuring it out.
You can do this with implicit styles in Silverlight 4.
Define your style in the regular way:
<Style x:Key="DefaultListBoxStyle" TargetType="ListBox">
....
<Style>
then create the implicit style:
<Style TargetType="ListBox"
BasedOn="{StaticResource DefaultListBoxStyle}" />
you could use implicit styles.
http://www.silverlightshow.net/items/Implicit-Styles-in-Silverlight-4.aspx
You define one global style for a type (in your case ListBoxItem) and then this style is the new default style for your app.
If you need any further information, just leave a comment.
BR,
TJ
I have created two different grid background and radio button style in my
App.xaml.
User can select any style to change the look of the page i.e: Changing the background and style of the radiobutton.
Now When I click on the raduio button the application navigates to another page and the style disappears.
Is there a way to Set the style in application level or I need to store the styleVar as Global Var and check on the second page load and then apply the styles as per the styleVar.
Yes like Jeff Wilcox said Implicit styling is a new thing in Silverlight 4. So if you want to create a style that is the default for all the controls of that type in the range XAML file or the whole application if placed in App.xaml you would leave out the x:Key attribute.
<Style x:Key="ButtonStyle" TargetType="Button">
To use ButtonStyle you would have to write:
<Button Content="A button" Style="{StaticResource ButtonStyle}" />
Leaving out the x:Key would allow you to use ButtonStyle as default.
<Style TargetType="Button">
<Button Content="A button with style that has no x:Key value" />
Now if you'd need to create a button that doesn't have this default style, you can set the Style property of that button to be x:Null or override by setting a named style to that button.
<Button Content="Default Silverlight button" Style="{x:Null}"/>
Another new thing with Styles in Silverlight 4 is that you can create new styles that are based on existing ones. Although it wasn't your question I'll give an example:
<Style TargetType="Button" BasedOn="{StaticResource BasedStyle}">
About implicit styling in the docs: http://msdn.microsoft.com/en-us/library/system.windows.style%28VS.95%29.aspx
Implicit Styles
In Silverlight 4, you can set styles
implicitly. That is, you can apply a
certain style to all elements of a
certain type. When a resource
is declared without an x:Key value,
the x:Key value assumes the value of
the TargetType property. If you set
the style implicitly, the style is
applied only to the types that match
the TargetType exactly and not to
elements derived from the TargetType
value. For example, if you create a
style implicitly for all the
ToggleButton controls in your
application, and your application has
ToggleButton and CheckBox controls
(CheckBox derives from ToggleButton),
the style is applied only to the
ToggleButton controls.
BasedOn Styles
Starting with Silverlight 3, it is
possible to build a new style based on
an existing style. You can do this
using the BasedOn property. This
reduces the duplication of code and
makes it easier to manage resources.
Each style supports only one BasedOn
style. For more information, see the
BasedOn property.
Just leave off the x:Key part of the Style, inside App.xaml. This is a new feature for Silverlight 4.
Place the styles in question in the App.xaml file. The application objects Resources property makes Styles and other resources available across the entire application.
I had the following situation:
main application has app.xaml, which sets the Style for TextBox controls
a custom control is implemented in a separate DLL, and uses several TextBox controls
The main application's TextBox Style is applied to the custom control's TextBox controls. Cool!
My problem comes in because I need to use a class derived from TextBox in the custom control. Now the main app's TextBox Style is no longer applied. Can the custom control DLL have something like "app.xaml" where I can set the style for all my derived TextBox controls? Or can the main application somehow set the Style for all TextBox-derived classes?
Thanks!
You can set the BasedOn property of the custom TextBox style to the base style. Should automatically derive from whichever base style it inherits, in this case your application-level style.
<Style x:Key="CustomControlStyle" TargetType="{x:Type local:CustomControl}" BasedOn="{x:Type TextBox}">