In an application that I am working I need to have all of my next buttons look the same. So my plan was to make a style called next button style and apply as needed. However I need to set some dependency properties on the button to be the same.
Here is the xmal for the style
<Style x:Key="NextButtonStyle" TargetType="diControls:DIButton">
<Setter Property="Margin" Value="5"></Setter>
<Setter Property="DIButtonStyle" Value="DIGreenImageButtonWithText_Medium"></Setter>
<Setter Property="Image" Value="RightArrowIcon_Gray"></Setter>
<Setter Property="HoverImage" Value="RightArrowIcon_White"></Setter>
<Setter Property="Command" Value="{Binding Path=NextPressedCommand}"></Setter>
</Style>
The custom properties DIButtonStyle,Image and HoverImage all say an exception has been thrown by the target of an invocation. Is there any way around this error?
Thanks!
Related
I am new XAML however I am given the task to override some styles for certain elements within an existing application.
In my custom Theme, I am attempting to override the style of a BORDER control.
From what I can tell (using Snoop) to inspect the application, the element I want to change is just a plain border.
The border also seems to have a Name of "SubMenuBorder". Please see the image below.
Here is the latest iteration of my style snippet in which I am trying to set the border control's Background, BorderBrush and BorderThickness BUT ONLY if the control has a name of "SubMenuBorder"
<Style TargetType="{x:Type Border}">
<Style.Triggers>
<Trigger Property="Name" Value="SubMenuBorder">
<Setter Property="Background" Value="Red"></Setter>
<Setter Property="BorderBrush" Value="Red"></Setter>
<Setter Property="BorderThickness" Value="20"></Setter>
</Trigger>
</Style.Triggers>
</Style>
Unfortunately the above does NOT work.
The style trigger does not seem to fire/apply to the intended control.
If I simplify things further and just style ALL borders with the following snippet, then it seems to work and the border control I want to change, is styled, but so is every other border control in the application.
<Style TargetType="{x:Type Border}">
<Setter Property="Background" Value="Red"></Setter>
<Setter Property="BorderBrush" Value="Red"></Setter>
<Setter Property="BorderThickness" Value="20"></Setter>
</Style>
Further Findings
I attempted to use a DataTrigger... which unfortunately doesn't work either.
Snoop shows below that the data trigger is being satisfied, however on the second image below you can see that the property of the background and borderbrush are still from the parenttemplate.
Any ideas please?
<Style TargetType="{x:Type Border}">
<Style.Triggers>
<DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Path=Name}" Value="SubMenuBorder">
<Setter Property="Background" Value="Red"></Setter>
<Setter Property="BorderBrush" Value="Red"></Setter>
<Setter Property="BorderThickness" Value="20"></Setter>
</DataTrigger>
</Style.Triggers>
</Style>
You cannot use triggers to modify a Border that is defined in a ControlTemplate, with the exception of using an implicit Style that applies to all elements of the type specified by the TargetType property of the implicit Style.
You will either have to modify the ControlTemplate itself, or programmatically find the Border element in the visual tree and then change its runtime property values. The first approach, i.e. modifying or creating a custom template, is the recommended approach.
The name "SubMenuBorder" is only known and applicable within that Border element's namescope.
On the xctk:IntegerUpDown, I would like the textbox border and the ButtonSpinner to only be visible when focused or mouseover.
It is easy enough to turn the border on/off using a <Style.Triggers> section.
It is also possible to control the ShowButtonSpinner property.
However, the content of the TextBox jumps to the right if I set ShowButtonSpinner=False.
I would like to simply hide the ButtonSpinner without TextBox contents jumping around.
Like this:
How can I get access to the appropriate property?
your question helped me to find ShowButtonSpinner property which I needed to hide up and down buttons
i can suggest a workaround with setting a fixed Padding for content when buttons are hidden. Value 0,0,17,0 seems ok to me (Win7, wpf toolkit version v2.6.0.0)
<xctk:IntegerUpDown.Style>
<Style TargetType="xctk:IntegerUpDown">
<Setter Property="Padding" Value="0,0,17,0"/>
<Setter Property="ShowButtonSpinner" Value="False"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="True">
<Setter Property="Padding" Value="0"/>
<Setter Property="ShowButtonSpinner" Value="True"/>
</Trigger>
</Style.Triggers>
</Style>
</xctk:IntegerUpDown.Style>
another simple thing is to align text to left side via property
<xctk:IntegerUpDown TextAlignment="Left"/>
I'm testing wpf applications using MahApp.Metro.
Somehow I'm not able to change the style of the ToggleSwitch. I just want to change simple properties like foreground or background of the switch. What am I doing wrong?
Mainwindow.xaml
<Style x:Key="flyoutToggleSwitchStyle" TargetType="{x:Type Controls:ToggleSwitch}" BasedOn="{StaticResource {x:Type Controls:ToggleSwitch}}">
<Setter Property="BorderBrush" Value="WhiteSmoke"/>
<Setter Property="Background" Value="White"/>
<Setter Property="Foreground" Value="Yellow"/>
<Setter Property="OnLabel" Value="Yes"/> <!--<<<---THIS WORKS!!-->
<Setter Property="OffLabel" Value="No"/>
</Style>
<Controls:ToggleSwitch Style="{StaticResource flyoutToggleSwitchStyle}">
<Controls:ToggleSwitch.Header>
<TextBlock>
Test
</TextBlock>
</Controls:ToggleSwitch.Header>
</Controls:ToggleSwitch>
Now there is a new ToggleSwitch property called SwitchForeground which allows changing the colour for ON position (tested on v0.14).
Example:
<controls:ToggleSwitch SwitchForeground="{StaticResource MyGreen}" />
The problem is that in the Mahapps.Metro ToggleSwitch most of the properties can not be changed within a style, because there is no TemplateBinding or Key defined in the original template definition.
So the style can only be changed by creating a new template. For this the ToggleSwitch and the ToggleSwitchButton templates have to be changed.
Issue on GitHub
Source of the templates
I'm fairly new to WPF and have created a style to alter the appearance of a button control. The style contains a data trigger to change the button background (amongst other things) based on a boolean property in the data context, e.g.:-
<Style x:Key="IndicatorButton" TargetType="Button">
<DataTrigger Binding="{Binding Path=ValveIsOpen}" Value="True">
<Setter Property="Background" Value="#00FF00"/>
..etc..
Currently the style is only used by a single button, so the data trigger binding is hard-coded with a property called "ValveIsOpen".
I now want to re-use this style throughout my app, with different buttons being bound to different properties. How would I change the data trigger binding on each button that the style is applied to?
Many thanks
You need to define a base style and derived styles, such as
<Style x:Key="IndicatorButton" TargetType="Button">
<Setter Property="Foreground" .../>
...
<Style x:Key="ValveIndicatorButton" TargetType="Button" BasedOn={StaticResource IndicatorButton}>
<DataTrigger Binding="{Binding Path=ValveIsOpen}" Value="True">
<Setter Property="Background" Value="#00FF00"/>
..etc..
My goal is to extend the already set style of an object. So assuming I have the following two styles:
<Style TargetType="Ellipse" x:Key="OriginalStyle">
<Setter Property="Fill" Value="Blue"/>
<Setter Property="Width" Value="100"/>
<Setter Property="Height" Value="200"/>
</Style>
<Style TargetType="Ellipse" x:Key="NewStyle">
<Setter Property="Fill" Value="Red"/>
</Style>
What I'd like to do is assign OriginalStyle to an Ellipse, then later apply the second style only changing the properties it affects. So ideally I want to do something like this:
Style OriginalStyle;
Style NewStyle;
Ellipse ellipse = new Ellipse();
ellipse .Style = OriginalStyle;
// Later in an event hanler
ellipse.Style = NewStyle; // I would want to keep the settings from the old style in here: in this example setting the style like this would make me lose the Width and Height properties!
I've tried to dynamically construct a new Style and add the properties of NewStyle and OldStyle - however the Property property of the styles are always null so this lead to a dead end:
Style combinedStyle = new Style();
foreach (Setter setter in Old.Setters)
{
combinedStyle.Setters.Add(setter); // Get exception "Element is already the child of another element."
}
foreach (Setter setter in NewStyle.Setters)
{
combinedStyle.Setters.Add(setter); // Get exception "Element is already the child of another element."
}
It seems like there is no way to dynamically merge styles in Silverlight. Could someone confirm this or show me a better approach to achieve merging?
Does "BasedOn" work in Silverlight? // wpf developer, never sure
You can do it simply like this:-
<Style TargetType="Ellipse" x:Key="OriginalStyle">
<Setter Property="Fill" Value="Blue"/>
<Setter Property="Width" Value="100"/>
<Setter Property="Height" Value="200"/>
</Style>
<Style TargetType="Ellipse" x:Key="NewStyle" BasedOn="{StaticResource OriginalStyle}">
<Setter Property="Fill" Value="Red"/>
</Style>
Note that the order of appearance of such Style elements is important, you can not base a style on something that the XAML parser has not yet processed.