styles interview questions
Top styles frequently asked interview questions
I'm getting a view from the XML with the code below:
Button view = (Button) LayoutInflater.from(this).inflate(R.layout.section_button, null);
I would like to set a "style" for the button how can I do that in java since a want to use several style for each button I will use.
Source: (StackOverflow)
I have a few WPF applications and I want all my styles to be in a shared assembly instead of declaring them in each application separately.
I am looking for a way so I don't have to change all my Style="{StaticResource BlahBlah}" in the existing applications; I just want to add the reference to this style assembly, and delete it from the current application, so it's taken from the assembly.
Is there any way?
Source: (StackOverflow)
The selected item in a WPF TreeView has a dark blue background with "sharp" corners. That looks a bit dated today:
I would like to change the background to look like in Explorer of Windows 7 (with/without focus):
What I tried so far does not remove the original dark blue background but paints a rounded border on top of it so that you see the dark blue color at the edges and at the left side - ugly.
Interestingly, when my version does not have the focus, it looks pretty OK:
I would like to refrain from redefining the control template as shown here or here. I want to set the minimum required properties to make the selected item look like in Explorer.
Alternative: I would also be happy to have the focused selected item look like mine does now when it does not have the focus. When losing the focus, the color should change from blue to grey.
Here is my code:
<TreeView
x:Name="TreeView"
ItemsSource="{Binding TopLevelNodes}"
VirtualizingStackPanel.IsVirtualizing="True"
VirtualizingStackPanel.VirtualizationMode="Recycling">
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<Setter Property="IsExpanded" Value="{Binding IsExpanded, Mode=TwoWay}" />
<Setter Property="IsSelected" Value="{Binding IsSelected, Mode=TwoWay}" />
<Style.Triggers>
<Trigger Property="IsSelected" Value="True">
<Setter Property="BorderBrush" Value="#FF7DA2CE" />
<Setter Property="Background" Value="#FFCCE2FC" />
</Trigger>
</Style.Triggers>
</Style>
</TreeView.ItemContainerStyle>
<TreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type viewmodels:ObjectBaseViewModel}" ItemsSource="{Binding Children}">
<Border Name="ItemBorder" CornerRadius="2" Background="{Binding Background, RelativeSource={RelativeSource AncestorType=TreeViewItem}}"
BorderBrush="{Binding BorderBrush, RelativeSource={RelativeSource AncestorType=TreeViewItem}}" BorderThickness="1">
<StackPanel Orientation="Horizontal" Margin="2">
<Image Name="icon" Source="/ExplorerTreeView/Images/folder.png"/>
<TextBlock Text="{Binding Name}"/>
</StackPanel>
</Border>
</HierarchicalDataTemplate>
</TreeView.Resources>
</TreeView>
Solution
With the excellent answers of Sheridan and Meleak my TreeView now looks like this in code (a result I am very happy with and which is pretty near Explorer's style):
<TreeView
...
<TreeView.ItemContainerStyle>
<Style TargetType="{x:Type TreeViewItem}">
<!-- Style for the selected item -->
<Setter Property="BorderThickness" Value="1"/>
<Style.Triggers>
<!-- Selected and has focus -->
<Trigger Property="IsSelected" Value="True">
<Setter Property="BorderBrush" Value="#7DA2CE"/>
</Trigger>
<!-- Mouse over -->
<Trigger Property="helpers:TreeView_IsMouseDirectlyOverItem.IsMouseDirectlyOverItem" Value="True">
<Setter Property="Background">
<Setter.Value>
<LinearGradientBrush EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFFAFBFD" Offset="0"/>
<GradientStop Color="#FFEBF3FD" Offset="1"/>
</LinearGradientBrush>
</Setter.Value>
</Setter>
<Setter Property="BorderBrush" Value="#B8D6FB"/>
</Trigger>
<!-- Selected but does not have the focus -->
<MultiTrigger>
<MultiTrigger.Conditions>
<Condition Property="IsSelected" Value="True"/>
<Condition Property="IsSelectionActive" Value="False"/>
</MultiTrigger.Conditions>
<Setter Property="BorderBrush" Value="#D9D9D9"/>
</MultiTrigger>
</Style.Triggers>
<Style.Resources>
<Style TargetType="Border">
<Setter Property="CornerRadius" Value="2"/>
</Style>
</Style.Resources>
</Style>
</TreeView.ItemContainerStyle>
<TreeView.Resources>
<HierarchicalDataTemplate DataType="{x:Type viewmodels:ObjectBaseViewModel}" ItemsSource="{Binding Children}">
<StackPanel Orientation="Horizontal" Margin="2,1,5,2">
<Grid Margin="0,0,3,0">
<Image Name="icon" Source="/ExplorerTreeView/Images/folder.png"/>
</Grid>
<TextBlock Text="{Binding Name}" />
</StackPanel>
</HierarchicalDataTemplate>
<!-- Brushes for the selected item -->
<LinearGradientBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFDCEBFC" Offset="0"/>
<GradientStop Color="#FFC1DBFC" Offset="1"/>
</LinearGradientBrush>
<LinearGradientBrush x:Key="{x:Static SystemColors.ControlBrushKey}" EndPoint="0,1" StartPoint="0,0">
<GradientStop Color="#FFF8F8F8" Offset="0"/>
<GradientStop Color="#FFE5E5E5" Offset="1"/>
</LinearGradientBrush>
<SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Black" />
<SolidColorBrush x:Key="{x:Static SystemColors.ControlTextBrushKey}" Color="Black" />
</TreeView.Resources>
</TreeView>
Source: (StackOverflow)
I use Google Chrome developer tools and I am constantly inspecting one element against another back and forth to find out what may be causing a particular styling issue.
It would be nice to compare the differences in style between element 1 and element 2.
Can this be done with chrome currently or via some workaround? Is there a tool out there that can do what I am looking for?
Current example of style difference is that I have an inline H4 next to a A where the A is appearing higher in vertical alignment. I am not seeking a solution in this question as I will sort it out.
Source: (StackOverflow)
I am having this issue where I am using the Android's Holo theme on a tablet project. However, I have a fragment on screen which has a white background. I am adding an EditText component on this fragment. I've tried to override the theme by setting the background of the Holo.Light theme resources. However, my text cursor (carat) remains white and hence, invisible on screen (I can spot it faintly in the edittext field..).
Does anyone know how I can get EditText to use a darker cursor color? I've tried setting the style of the EditText to "@android:style/Widget.Holo.Light.EditText" with no positive result.
Source: (StackOverflow)
I have a ListViewItem that I am applying a Style to and I would like to put a dotted grey line as the bottom Border.
How can I do this in WPF? I can only see solid color brushes.
Source: (StackOverflow)
I'm stuck with one very stupid problem - need to style selected row in WPF DataGrid.
I want to show a rectangle with blue border instead of just filling entire row with some color.
Any ideas how to implement this? It just must be some way to make it pretty easy.
Source: (StackOverflow)
Can I specify a style that applies to all elements? I tried
<Style TargetType="Control">
<Setter Property="Margin" Value="0,5" />
</Style>
But it did nothing
Source: (StackOverflow)
I have just been learning about how styles and control templates in WPF can affect the appearance of buttons,
I'm trying to set the Button's FlatStyle, in the resources I've seen I can't find anything that tells me how I can do this, in Windows Forms this is set through FlatStyle = Flat.
How would one do this in WPF?
Source: (StackOverflow)
Is it possible to set multiple styles for different pieces of text inside a TextView?
For instance, I am setting the text as follows:
tv.setText(line1 + "\n" + line2 + "\n" + word1 + "\t" + word2 + "\t" + word3);
Is it possible to have a different style for each text element? E.g., line1 bold, word1 italic, etc.
The developer guide's Common Tasks and How to Do Them in Android includes Selecting, Highlighting, or Styling Portions of Text:
// Get our EditText object.
EditText vw = (EditText)findViewById(R.id.text);
// Set the EditText's text.
vw.setText("Italic, highlighted, bold.");
// If this were just a TextView, we could do:
// vw.setText("Italic, highlighted, bold.", TextView.BufferType.SPANNABLE);
// to force it to use Spannable storage so styles can be attached.
// Or we could specify that in the XML.
// Get the EditText's internal text storage
Spannable str = vw.getText();
// Create our span sections, and assign a format to each.
str.setSpan(new StyleSpan(android.graphics.Typeface.ITALIC), 0, 7, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
str.setSpan(new BackgroundColorSpan(0xFFFFFF00), 8, 19, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
str.setSpan(new StyleSpan(android.graphics.Typeface.BOLD), 21, str.length() - 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
But that uses explicit position numbers inside the text. Is there a cleaner way to do this?
Source: (StackOverflow)
What I have is an object that has an IsReadOnly property. If this property is true, I would like to set the IsEnabled property on a Button, ( for example ), to false.
I would like to believe that I can do it as easily as IsEnabled="{Binding Path=!IsReadOnly}" but that doesn't fly with WPF.
Am I relegated to having to go through all of the style settings? Just seems too wordy for something as simple as setting one bool to the inverse of another bool.
<Button.Style>
<Style TargetType="{x:Type Button}">
<Style.Triggers>
<DataTrigger Binding="{Binding Path=IsReadOnly}" Value="True">
<Setter Property="IsEnabled" Value="False" />
</DataTrigger>
<DataTrigger Binding="{Binding Path=IsReadOnly}" Value="False">
<Setter Property="IsEnabled" Value="True" />
</DataTrigger>
</Style.Triggers>
</Style>
</Button.Style>
Source: (StackOverflow)
How could I style the color, size and shadow of icons from Font Awesome's Icons?
For example, Font Awesome's site will show some icons in white and some in red but won't show the CSS for how to style them that way ...
Source: (StackOverflow)
I'm trying to change the drawable that sits in the Android actionbar searchview widget.
Currently it looks like this:
but I need to change the blue background drawable to a red colour.
I've tried many things short of rolling my own search widget, but nothing seems to work.
Can somebody point me in the right direction to changing this?
Source: (StackOverflow)