I am using TextBlock control. Text in the TextBlock is clearly displayed with 0 degree rotation.
But if i rotated the control to 90 degree using LayoutTransform, text is not clear. some blurry display.
Is there anyother way to rotate the text without LayoutTransform or anyother way for clear display?
try using "UseLayoutRounding=true" on your TextBox
I know this is an old question, however, I had the same problem with a user control which had SnapsToDevicePixels="True" and UseLayoutRounding="True"
with the code below the first label showed a blurred box, while the non-transformed one showed the text perfectly. I tried flowing up the snaps and rounding properties up to the hierarchy and in the end, the only thing that fixed this behavior was to apply UseLayoutRounding=" True" to the window. Applying it to any other children panel or user-control did not fix it.
<UserControl x:Class="MyApp.Controls.Indications"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300"
SnapsToDevicePixels="True"
UseLayoutRounding="True">
<Stackpanel>
<Label
BorderBrush="Black"
BorderThickness="1"
HorizontalAlignment="Center">
<TextBlock
Width="100"
TextAlignment="Center"
Text="Left Outboard Actuator"
TextWrapping="Wrap">
<TextBlock.LayoutTransform>
<RotateTransform
Angle="90"/>
</TextBlock.LayoutTransform>
</TextBlock>
</Label>
<Label
BorderBrush="Black"
BorderThickness="1"
HorizontalAlignment="Center">
<TextBlock
Width="100"
TextAlignment="Center"
Text="Left Outboard Actuator"
TextWrapping="Wrap">
</TextBlock>
</Label>
</Stackpanel>
</UserControl>
Set TextBlock's Foreground property a value(like Black) will be clear. it's worked on my project when I rotate textblock 90 degree.
Related
The following Combobox in WPF project needs to always have exactly two Rectangles of heights 256 and 36 in each item respectively. And when user clicks on the dropdown button of the Combobox I would like to have it display both ComboboxItems without user having to scroll.
Question: How can we achieve it? Currently it displays only first ComboboxItem (Aqua color rectangle inside), and you have to scroll to get to see the second ComboboxItem (YellowGreen color rectangle inside). I have tried setting ScrollViewer.VerticalScrollBarVisibility="Hidden" on combo box but that makes it even worst since it does not even allow to show the second item.
XANL:
<Window x:Class="Wpf_TestApp.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:Wpf_TestApp"
mc:Ignorable="d"
Title="MainWindow" Height="569.455" Width="800">
<Grid>
<StackPanel Margin="5" Width="15">
<ComboBox DockPanel.Dock="Top" Width="25">
<DockPanel>
<ComboBoxItem DockPanel.Dock="Top">
<StackPanel Width="180" Height="260">
<Rectangle x:Name="MyRectangle" Fill="Aqua" Width="176" Height="256"/>
</StackPanel>
</ComboBoxItem>
</DockPanel>
<DockPanel>
<ComboBoxItem DockPanel.Dock="Top">
<StackPanel Width="180" Height="38">
<TextBlock Text="Second Item:" />
<Rectangle x:Name="MyOtherRectangle" Fill="YellowGreen" Width="176" Height="36"/>
</StackPanel>
</ComboBoxItem>
</DockPanel>
</ComboBox>
</StackPanel>
</Grid>
</Window>
Screenshot of the above combobox:
Display when user first clicks on dropdown of the combobox:
User has to scroll to get to the second item of the combobox:
You can use dependency property MaxDropDownHeight of ComboBox as shown below to display both combo box items in the drop down without having to scroll,
<ComboBox DockPanel.Dock="Top" Width="25" MaxDropDownHeight="Auto">
I have tested your code with 320 Height and it works perfectly fine. If you need to add more items, you can increase the MaxDropDownHeight value accordingly.
Friends, below is my code. I don't know why my scroll bar is not working.
<Window x:Class="Seris.Views.Help"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Help" Height="400" Width="400">
<DockPanel>
<ScrollViewer VerticalScrollBarVisibility="Auto">
<TextBlock HorizontalAlignment="Left" Margin="10,10,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Height="350" Width="372"><InlineUIContainer>
<Image Height="100" Width="100" RenderTransformOrigin="1.37,0.46" Source="../Images/help.jpg"/>
</InlineUIContainer><Run/><LineBreak/><Run Text="There are some validations on the Vehicle Form as below."/><LineBreak/><Run Text="P"/><Run Text="lease note that all the fields are mandatory."/><LineBreak/><Run/><LineBreak/><Run FontWeight="Bold" Text="Vehicle No"/><LineBreak/><Run Text="It should be always 7 character long con"/><Run Text="taining "/><Run Text="first 3 digits as alphabet in capital form and remaining 4 numerical. "/><LineBreak/><Run Text="i.e. GHI1234"/><LineBreak/><Run FontWeight="Bold" Text="Model"/><LineBreak/><Run Text="It can be anything except null."/><LineBreak/><Run Text="i.e. Fluid"/><LineBreak/><Run FontWeight="Bold" Text="Manufacturing Date"/><LineBreak/><Run Text="It should not be a future date."/><LineBreak/><Run FontWeight="Bold" Text="IU No"/><LineBreak/><Run Text="It must be 10 digit numerical number."/><LineBreak/><Run FontWeight="Bold" Text="Personnel Name"/><LineBreak/><Run Text="You must select Personnel Name from combo box."/><LineBreak/>
</TextBlock>
</ScrollViewer>
</DockPanel>
</Window>
Remove Height="350" & Width="372" from the TextBlock, these are preventing ScrollViewer to work properly
if you want to restrict the size you may apply the same to DockPanel or ScrollViewer as needed.
so in short if you apply width or height to TextBlock that will restrict the size of the element and ScrollViewer may not work as expected.
additionally you may also remove HorizontalAlignment="Left" & VerticalAlignment="Top" from the TextBlock as they might not be required as well
I wanted a <Border> around my <Image> - sounds simple enough. but I could never get it to appear. I eventually made it "Red" with "BorderThickness=20" - then it was obvious that it was going around the entire "LayoutRoot"! Something like:
<UserControl x:Class="BorderCrossing.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="400">
<Grid x:Name="LayoutRoot" Margin="10" Background="Black">
<Border Canvas.ZIndex="1" Background="White" HorizontalAlignment="Center" Opacity=".5" VerticalAlignment="Top">
<TextBlock x:Name="idTextBlock" FontSize="20" FontWeight="Bold" Foreground="Black" Text="ID Here" />
</Border>
<Border Canvas.ZIndex="1" Background="Blue" BorderThickness="5" BorderBrush="AntiqueWhite">
<Image x:Name="thumbnailImage" Height="100" Width="100" Stretch="Uniform" />
</Border>
</Grid>
In order to "fix" this, I found that adding 'HorizontalAlignment="Left" VerticalAlignment="Top"' to the <Border> placed the border around the <Image>, as desired. I also found that I could enclose the <Border> in a <Canvas> and achieve a similar result.
What is going on? Can someone explain this in a way that will prevent my "wonder" in the future?
Thanks,
David
The default for VerticalAlignment and HorizontalAlignment is "Stretch", so the Border stretches to the entire available space by default. It does not happen inside of a Canvas because a Canvas does not take these properties into account when performing layout of its children, so they get the minimum size based on properties like Width, Height, MinWidth and similar properties of their children. Positioning in a Canvas is done with Canvas.Top and Canvas.Left properties, while a Grid uses the ~Alignment properties as well as Margins.
I have a simple window with a simple composite control embedded within it.
(Main Window)
<Window x:Class="TabOrder.Window1"
xmlns:local="clr-namespace:TabOrder"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<Grid>
<Label HorizontalAlignment="Left" VerticalAlignment="Top">First</Label>
<TextBox TabIndex="0" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="80,0,0,0"/>
<Label HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,30,0,0">Second</Label>
<TextBox TabIndex="1" HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="80,30,0,0"/>
<local:MyControl Margin="0,60,0,0" VerticalAlignment="Top" HorizontalAlignment="Stretch" TabIndex="2"/>
</Grid>
(Composite control)
<UserControl x:Class="TabOrder.MyControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<Grid>
<Label HorizontalAlignment="Left" VerticalAlignment="Top">Third</Label>
<TextBox HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="80,0,0,0"/>
<Label HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0,30,0,0">Fourth</Label>
<TextBox HorizontalAlignment="Stretch" VerticalAlignment="Top" Margin="80,30,0,0"/>
</Grid>
As expected on my form I get 4 text boxes...
First
Second
Third
Fourth
But when "First" has focus and I hit tab the focus is switched to "Third". WPF seems to be seeing the tab list as a single flat list rather than as a tree where MyControl is TabIndex 3 and the text box "Third" the first tabbed control within it.
Is this a bug in WPF or is there another way of doing this? The composite control is used in many windows, it could even be used more than once on a single window.
I know this response is quite late... but have you tried:
<UserControl ... KeyboardNavigation.TabNavigation="Local">
Doing so will ensure once your UserControl has recieved focus, you will navigate only through TabStop within your UserControl (instead of worring about conflicting TabIndex values throughout your app). After looping through the TabStops of your UserControl, TabNavigation will resume to the TabStop outside of it.
http://msdn.microsoft.com/en-us/library/system.windows.input.keyboardnavigationmode.aspx
Canvas doesn't seem to play well together nicely with the other elements when you try to build it into a layout and have e.g. controls on the side and the canvas is the drawing area.
For instance, why can I put a border around every element except a canvas? In the following code, border wraps canvas but the canvas only has the border on the top but not on the left, right or bottom:
<Window x:Class="WpfApplication25.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window1" Height="300" Width="300">
<StackPanel>
<TextBlock DockPanel.Dock="Bottom" Text="Move the slider to reveal the answer:"/>
<Slider DockPanel.Dock="Bottom" Name="theSlider"
HorizontalAlignment="Left"
Width="200"
Minimum="0"
Maximum="1"
Value="1"
Cursor="Hand"/>
<Border BorderBrush="Tan" BorderThickness="2">
<Canvas>
<TextBlock Canvas.Left="45" Canvas.Top="50" Text="test" FontSize="16"/>
<Rectangle
Canvas.Left="10"
Canvas.Top="10"
Width="100"
Height="100"
Fill="Silver"
Opacity="{Binding ElementName=theSlider, Path=Value}"
/>
</Canvas>
</Border>
</StackPanel>
</Window>
From what I can tell in XamlPad, the problem appears to be that your Canvas does not have an explicit height/width, and that its HorizontalAlignment defaults to being in the middle of the Border. Without an explicit height and width the Border appears to collapse to 0 height and stretches on the width. My assumption is this is because your Border is in a StackPanel, as placing the Border in a Grid, causes it to behave as expected.
Your best bet is to give the Canvas an explicit Height and Width. Not sure that is what you're looking for though.
As far as I understand what you are trying to achieve, you should place your controls in one cell of a Grid and your Canvas in another.