I would like to change ComboBox placeholder color in my demo UWP app. So I tried to create static resources:
<UserControl.Resources>
<Style x:Key="ComboBoxStyle" TargetType="ComboBox">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="ComboBox">
<ContentControl x:Name="PlaceholderTextContentPresenter"
Content="{TemplateBinding PlaceholderText}" />
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</UserControl.Resources>
Using:
<ComboBox Grid.Row="1" Foreground="White" HorizontalAlignment="Stretch" Background="Transparent"
PlaceholderText="Выбор оператора" Style="{StaticResource ComboBoxStyle}">
<x:String>iPhone 11</x:String>
<x:String>iPhone 12</x:String>
<x:String>Xiaomi Red Mi</x:String>
<x:String>Samsung Galaxy 10</x:String>
<ComboBox.Resources>
<Style TargetType="ContentControl">
<Setter Property="Foreground" Value="White" />
<Setter Property="FontSize" Value="15" />
</Style>
</ComboBox.Resources>
</ComboBox>
Foreground in placeholder changed correctly but ComboBox is disappeared. How can I will change ComboBox placeholder foreground?
How to change ComboBox placeholder foreground in UWP
UWP ComboBox contains PlaceholderForeground propety, if you want to chage the default one, you just need to give it specific value like the following. And please not the property avaiable in version 16299 or higher.
<ComboBox
Grid.Row="1"
HorizontalAlignment="Stretch"
Background="Transparent"
Foreground="White"
PlaceholderText="Выбор оператора"
PlaceholderForeground="DarkBlue">
<x:String>iPhone 11</x:String>
<x:String>iPhone 12</x:String>
<x:String>Xiaomi Red Mi</x:String>
<x:String>Samsung Galaxy 10</x:String>
</ComboBox>
Related
I would like to build a validation text box, which would be a normal UWP TextBox wrapped within a StackPanel, which also contains a TextBlock. The intent is that a validation message can be shown beneath the text box when there is a validation error.
I know I can do this by creating a custom control, but this would require me to implement all the properties I need and create a bunch of dependency properties, etc.
I'm hoping there is an easier way, where I can just completely derive the text box, but override the display template for it and include a label beneath it.
You can get most of the way there in XAML using the built-in IDataErrorInfo-based validation machinery and defining a control template for the TextBox's Validation.ErrorTemplate. There's a pretty good article at this link:
The XAML from the article at the link above follows, also check out this discussion on WPF's built-in validation here.
<Style TargetType="{x:Type Label}">
<Setter Property="Margin" Value="5,0,5,0" />
<Setter Property="HorizontalAlignment" Value="Left" />
</Style>
<Style TargetType="{x:Type TextBox}">
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="Margin" Value="0,2,40,2" />
<Setter Property="Validation.ErrorTemplate">
<Setter.Value>
<ControlTemplate>
<DockPanel LastChildFill="true">
<Border Background="OrangeRed" DockPanel.Dock="right" Margin="5,0,0,0"
Width="20" Height="20" CornerRadius="5"
ToolTip="{Binding ElementName=customAdorner,
Path=AdornedElement.(Validation.Errors)[0].ErrorContent}">
<TextBlock Text="!" VerticalAlignment="center" HorizontalAlignment="center"
FontWeight="Bold" Foreground="white" />
</Border>
<AdornedElementPlaceholder Name="customAdorner" VerticalAlignment="Center" >
<Border BorderBrush="red" BorderThickness="1" />
</AdornedElementPlaceholder>
</DockPanel>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I am trying to create a header template for a GroupBox (for now, and others later on).
Currently I have
<!--GroupBox-->
<Style TargetType="GroupBox">
<Setter Property="BorderBrush" Value="{StaticResource wspCharcoalDarkBrush}"/>
<Setter Property="HeaderTemplate">
<Setter.Value>
<DataTemplate>
<TextBlock Text="{Binding}" Style="{StaticResource wspTitleBlockBold}"/>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
Which works well if I have
<GroupBox Margin="3" Header="TEST">
</GroupBox>
The Header says "TEST"
If I want to customise it for a one off and use this
<GroupBox Margin="3">
<GroupBox.Header>
<StackPanel Orientation="Horizontal">
<Image/>
<TextBlock Text="TEST"/>
</StackPanel>
</GroupBox.Header>
</GroupBox>
All I get for a header is "System.Windows.Controls.StackPanel" in the header.
Is there a way around this so that I can have the option of specifying the header either way and not have to create 2 separate styles?
Thanks,
Brent
I want to create a grid of images without any margin between them. I tried to achieve this through a GridView. If there is an easier way, please let me know.
I found this answers on StackOverflow:
https://stackoverflow.com/a/10492464
https://stackoverflow.com/a/23817931/5739170
And ended up with this code:
<Page.Resources>
<Style x:Key="MyGridViewItemStyle" TargetType="GridViewItem">
<Setter Property="Padding" Value="0" />
<Setter Property="Margin" Value="0" />
<Setter Property="BorderThickness" Value="0" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="GridViewItem">
<GridViewItemPresenter ContentMargin="0" Padding="0" Margin="0" BorderThickness="0"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<StackPanel>
<GridView ItemsSource="{x:Bind FieldList}" Margin="0,50,0,0" Padding="0" BorderThickness="0" ItemContainerStyle="{StaticResource MyGridViewItemStyle}" IsItemClickEnabled="True" ItemClick="OnItemClick">
<GridView.ItemTemplate>
<DataTemplate x:DataType="data:Field">
<Image Width="20" Height="20" Margin="0" Source="{x:Bind ImagePath}"/>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
<TextBlock x:Name="text">Hallo!</TextBlock>
</StackPanel>
</Grid>
But there is still a margin left:
Screenshot
I have also tried to use negative margins but when I use them clicks aren't recognized correctly anymore.
How can I remove the margins?
Seems like the GridViewItem has a default MinWidth of 44px.
You can set it to 0 via your GridViewItemStyle:
<Setter Property="MinWidth" Value="0" />
EDIT: it also has a default MinHeight, you might want to set that to 0 as well.
The code below should work:
<GridView.ItemContainerStyle>
<Style TargetType="GridViewItem">
<Setter Property="Margin" Value="0"/>
</Style>
</GridView.ItemContainerStyle>
Your code is good. If you add a Grid in the DataTemplate (with a Background), you will see there is no margin between grids :
<DataTemplate x:DataType="data:Field">
<Grid Background="Red">
<Image Width="20" Height="20" Margin="0" Source="{x:Bind ImagePath}"/>
</Grid>
</DataTemplate>
Your problem is the following : you set a fixed size for Image control wich all of them is in a container, but the container doesn't have a fixed, so images are centered in the container.
I see two solutions. First is to remove the fixed size for Image control and use Strecth property to fill correctly :
<DataTemplate x:DataType="data:Field">
<Image VerticalAlignment="Stretch"
HorizontalAlignment="Stretch"
Stretch="UniformToFill"
Margin="0"
Source="{x:Bind ImagePath}"/>
</DataTemplate>
For the first solution, you must be sure of the filling behavior of the container. You can do something like :
<GridViewItemPresenter ContentMargin="0"
Padding="0"
Margin="0"
BorderThickness="0"
HorizontalAlignment="Stretch"
HorizontalContentAlignment="Stretch" />
The second solution is to set a fixed size on the container directly :
<Style x:Key="MyGridViewItemStyle"
TargetType="GridViewItem">
<Setter Property="Padding"
Value="0" />
<Setter Property="Margin"
Value="0" />
<Setter Property="BorderThickness"
Value="0" />
<Setter Property="Width"
Value="20" />
<Setter Property="Height"
Value="20" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="GridViewItem">
<GridViewItemPresenter ContentMargin="0"
Padding="0"
Margin="0"
BorderThickness="0"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I'm trying to create a group sorted long list selector for a windows phone 8 app and I need it's color to be fixed, to mach the app's color theme... I'm being able to set the background color with no problem, but what is happening is that the disabled letters background does not appear grayed-out, instead they are appear with the same color as the enabled ones... This is the code:
What I'm doing:
<phone:JumpListItemForegroundConverter x:Key="ForegroundConverter"/>
<Style x:Key="AddrBookJumpListStyle" TargetType="phone:LongListSelector">
<Setter Property="GridCellSize" Value="113,113"/>
<Setter Property="LayoutMode" Value="Grid" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<Border **Background="#FF00a3e8"** Width="113" Height="113" Margin="6" >
<TextBlock Text="{Binding Key}" FontFamily="{StaticResource PhoneFontFamilySemiBold}" FontSize="48" Padding="6"
Foreground="{Binding Converter={StaticResource ForegroundConverter}}" VerticalAlignment="Center"/>
</Border>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
What will show the disabled items grayed-out, but bind the background color to the phone's theme:
<phone:JumpListItemBackgroundConverter x:Key="BackgroundConverter"/>
<phone:JumpListItemForegroundConverter x:Key="ForegroundConverter"/>
<Style x:Key="AddrBookJumpListStyle" TargetType="phone:LongListSelector">
<Setter Property="GridCellSize" Value="113,113"/>
<Setter Property="LayoutMode" Value="Grid" />
<Setter Property="ItemTemplate">
<Setter.Value>
<DataTemplate>
<Border **Background="{Binding Converter={StaticResource BackgroundConverter}}"** Width="113" Height="113" Margin="6" >
<TextBlock Text="{Binding Key}" FontFamily="{StaticResource PhoneFontFamilySemiBold}" FontSize="48" Padding="6"
Foreground="{Binding Converter={StaticResource ForegroundConverter}}" VerticalAlignment="Center"/>
</Border>
</DataTemplate>
</Setter.Value>
</Setter>
</Style>
You should add the Enabled and Disabled properties to the JumpListItemBackgroundConverter. Like so:
<phone:JumpListItemBackgroundConverter
x:Key="BackgroundConverter"
Enabled="YellowGreen"
Disabled="DarkGreen" />
If you just want the standard gray-ish color for the disabled items, just leave out the Disabledproperty.
I have created a Style for circular button in windows application. I am using this style to make the buttons appear circular. Code for the Style is below:
<Style x:Key="CircularButton" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="#FFF8F1F1" />
<Image Width="50" Height="50" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
I am using like below :
<Button x:Name="btnFacebook" Style="{StaticResource CircularButton}" Click="btnFacebook_Click" Visibility="Visible" Margin="10,0" />
Now I have many buttons on the page that need to be circular,but need to have different background images.Is there any way to set the image source of this style for different buttons.I have tried code like below:
<Button x:Name="btnTwitter" Style="{StaticResource CircularButton}" Click="btnTwitter_Click" HorizontalAlignment="Stretch" Margin="10,0">
<ControlTemplate>
<Image Source="Images/appbar.social.twitter.png"/>
</ControlTemplate>
</Button>
Also I have tried placing the image directly inside the button content , or using the template binding for showing the image inside the button.Is there any way of doing this without creating different styles for different buttons.
something like this:
<Style x:Key="CircularButton" TargetType="Button">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="Button">
<Grid>
<Ellipse Stroke="#FFF8F1F1" />
<Image Width="50" Height="50" Source="{TemplateBinding Content}" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Button x:Name="btnTwitter" Style="{StaticResource CircularButton}" Click="btnTwitter_Click" HorizontalAlignment="Stretch" Margin="10,0">
<BitmapImage UriSource="Images/appbar.social.twitter.png"/>
</Button>