I want to open full screen popup but what is happening right now is that from the top it increases but bottom transparent or any color effect is not visible.Below is the code i am using .please let me know where i am wrong.Please see popup design CLICK HERE
<Popup StaysOpen="False" x:Name="popintaling" Width="{Binding Source={x:Static SystemParameters.FullPrimaryScreenWidth}}" Placement="Center" IsOpen="False" Height="900" Panel.ZIndex="1" HorizontalAlignment="Center" VerticalAlignment="Center" AllowsTransparency="True" PopupAnimation="Fade" ClipToBounds="True" OpacityMask="#FFFFAA00" RenderTransformOrigin="0,0" >
<Popup.Effect>
<DropShadowEffect/>
</Popup.Effect>
<Border Width="{Binding Source={x:Static SystemParameters.FullPrimaryScreenWidth}}" Height="900" BorderBrush="#7F1D1A1A" Margin="0,0,0,0" BorderThickness="300,300,300,300" HorizontalAlignment="Center" >
<Canvas Margin="0,100,0,90" Height="800" Width="{Binding Source={x:Static SystemParameters.FullPrimaryScreenWidth}}" Panel.ZIndex="999" HorizontalAlignment="Center" VerticalAlignment="Center" Background="#FFF3800C" >
//some code here
</Canvas>
</Border>
</Popup>
A Popup that covers more than 75 percent of the screen, reduces its width first and then its height to meet the maximum coverage limit of 75 percent.You cannot cover make it full screen.
Read the documentation : PlacementMode
after InitializeComponent in constructor, set popup child width and height from code
(popintaling.Child as FrameworkElement).Height = Window.Current.Bounds.Height;
(popintaling.Child as FrameworkElement).Width = Window.Current.Bounds.Width;
A full screen popup is not a popup. Just put that code into a border with a Background color and handle the events yourself. Also to make your App fullscreen just set the WindowState to Maximized, and the WindowStyle to None
Related
I have a popup for which the size changes dynamically to fit the content. When the size increases, popup width increased in left direction only until it reaches left edge of the window. But in my case, I want popup width to be increased in right direction.
Below is the code snippet I am using
XAML:
<StackPanel>
<TextBox x:Name="popupText" Margin="5"/>
<Button Content="Change PopupText" Click="Button_Click_1" Margin="5"/>
<Canvas x:Name="canvas" Width="200" Height="200" Background="Red">
<Rectangle x:Name="rect" Canvas.Top="50" Canvas.Left="50"
Width="50" Height="100"
Stroke="White" StrokeThickness="3"/>
<Popup x:Name="popup" AllowsTransparency="true"
IsOpen="True" Placement="Relative"
PlacementTarget="{Binding ElementName=canvas}"
PlacementRectangle="50,50,50,100"
HorizontalOffset="0"
>
<TextBlock x:Name="textBlock" FontSize="14" Background="Yellow"
TextWrapping="Wrap" >
This is a popup with a PlacementRectangle.
</TextBlock>
</Popup>
</Canvas>
</StackPanel>
C#:
private void Button_Click_1(object sender, RoutedEventArgs e)
{
this.textBlock.Text += this.popupText.Text;
}
ScreenShots:
Before changing size
After changing size
Type anything in the textbox and click "Change PopupText" button. you can clearly see popup size increasing in left direction.
Is above one behavior of popup? Could I change this behavior and increase popup width in right direction?
Thanks in Advance,
Shobika.
You may want to have a look at custom popup placements.
Set Placement="Custom" on your popup and use the CustomPopupPlacementCallback property to reference a callback. In the callback, you can calculate preferred placements, relative to your placement target.
I have a layout contained within a ScrollViewer in which I need to draw a horizontal dashed line that stretches to the full width of the container. The closest I've managed is the following
<ScrollViewer HorizontalScrollBarVisibility="Auto">
<StackPanel>
<Button Width="400" Height="50" VerticalAlignment="Top" Margin="10" />
<Line HorizontalAlignment="Stretch" VerticalAlignment="Bottom" Stroke="Black"
X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}"
StrokeDashArray="2 2" StrokeThickness="1" />
</StackPanel>
</ScrollViewer>
This nearly works, however once the container (in my case a window) has been enlarged, the line doesn't shrink back down to the appropriate size when the container is sized back down. The below is the screenshot of the same window after I have horizontally sized the window up and down.
Note that the fact that the line is dashed is important as it means that solutions that involve stretching the line don't work (the dashes appear stretched).
I know that this is because of the X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}" binding (by design the line is always the widest thing in the scrollable region, so when I size the window down the scrollable region the line defines the width of the scrollable region), however I can't think of a solution.
How can I fix this problem?
Screenshot of why using ViewportWidth doesn't work
I realised that what I needed was for the Line to ask for zero space during the measure step of layout, but then use up all the available space during the arrange step. I happened to stumble across the question Make WPF/SL grid ignore a child element when determining size which introduced the approach of using a custom decorator which included this logic.
public class NoSizeDecorator : Decorator
{
protected override Size MeasureOverride(Size constraint) {
// Ask for no space
Child.Measure(new Size(0,0));
return new Size(0, 0);
}
}
(I was hoping that some existing layout control incorporated this logic to avoid having to write my own layout logic, however the logic here is so simple that I'm not really that fussed). The modified XAML then becomes
<ScrollViewer HorizontalScrollBarVisibility="Auto">
<StackPanel>
<Button Width="400" Height="50" VerticalAlignment="Top" Margin="10" />
<local:NoSizeDecorator Height="1">
<Line Stroke="Black" HorizontalAlignment="Stretch"
X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}"
StrokeDashArray="2 2" StrokeThickness="1" />
</local:NoSizeDecorator>
</StackPanel>
</ScrollViewer>
This works perfectly
You may put a very long Line in a left-aligned Canvas with zero Width and ClipToBounds set to false.
<ScrollViewer HorizontalScrollBarVisibility="Auto">
<StackPanel>
<Button Width="400" Height="50" VerticalAlignment="Top" Margin="10" />
<Canvas HorizontalAlignment="Left" Width="0" ClipToBounds="False">
<Line Stroke="Black" StrokeDashArray="2 2" X2="10000"/>
</Canvas>
</StackPanel>
</ScrollViewer>
I have a popup defined as follows,
<Popup x:Name="popLines"
Placement="Bottom"
IsOpen="False"
Width="145" Height="42"
StaysOpen="False"
PopupAnimation="Fade"
AllowsTransparency="True"
HorizontalOffset="-2" VerticalOffset="0">
<Grid Margin="2">
<Path StrokeThickness="0.7" StrokeLineJoin="Round" Fill="#FFFFFFFF" Stretch="Fill" Stroke="Black" Data="M6.5,0.5 L30.167,0.5 30.167,8.4999992 190.16701,8.4999992 190.16701,44.166001 0.5,44.166001 0.5,8.4999992 6.5,8.4999992 6.5,0.5 z">
</Path>
<Grid>
<StackPanel Orientation="Horizontal">
<TextBox BorderBrush="Black" BorderThickness="0.5" Margin="5,10,2,2" Width="110" Height="20" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" ToolTip="Excel File Path"></TextBox>
<Image Source="/App_Desktop;component/Resources/save.png" Margin="2,10,5,2" Width="16" Height="16"></Image>
</StackPanel>
</Grid>
</Grid>
</Popup>
I set IsOpen=true when an image MouseLeftButtonDown event fires.Except, the popup disappears as soon as it appears. What is going wrong?
I think what happens is, that the the MouseLeftButtonUp event fires while the Mouse is not over the Popup. Try holding the mousebutton down and move your mouse so it is above the popup to see if it stays open, and then release the mousebutton.
you can solve this by setting StaysOpen="True" or by setting IsOpen=true in a click eventhandler or MouseButtonUp eventhandler.
Also using your example with the image, you could have a transparent area right above the image in your popup visualtree that 'captures' the MouseUp event when the popup is open. you would have to change the placement option and bind that area to the image's width and height properties.
I am using a WPF Popup control, and it is showing the background as black. I put a StackPanel inside it with Background="Transparent", but that does not help.
<Popup PlacementTarget="{Binding ElementName=parentStackPanel}" Placement="Center"
IsOpen="False" Name="m_popWaitNotifier" PopupAnimation="None"
AllowsTransparency="False">
<StackPanel Orientation="Vertical" Background="Transparent">
<uc:CircularProgressBar x:Name="CB" StartupDelay="0"
RotationsPerMinute="20"
Height="25" Foreground="White"
Margin="12"/>
</StackPanel>
</Popup>
How does one make the background on Popup transparent (or any color)?
You need to set the AllowsTransparency="True" Popup Property to True
Here is an example:
<Grid>
<StackPanel>
<Button Click="Button_Click" Width="100" Height="20" Content="Click" />
<Popup x:Name="popup" Width="100" Height="100" AllowsTransparency="True">
<Grid Background="Transparent">
<TextBlock Text="Some Text" />
</Grid>
</Popup>
</StackPanel>
</Grid>
and the click handler
private void Button_Click(object sender, RoutedEventArgs e)
{
popup.Visibility = System.Windows.Visibility.Visible;
popup.IsOpen = true;
}
The base color of a Popup, or a Window for that matter, is black. You rarely see it for a Window because Window has a Background property and it defaults to a solid color, but if you set Window.Background to Transparent it will also be black. But Popup doesn't have a Background property and so, pardon the pun, this problem "pops up".
If you want the Popup to be transparent, you need to set AllowsTransparency="True". However, if you want the Popup to be a solid color, the simplest approach is to make the child of the Popup a Panel that supports the Background property and set that property to the color you desire and then set the child of the Panel to be the content you intended for the Popup in the first place. I suggest Grid as it won't affect the layout of your Popup. It's only effect will be to give you the background color you desire.
Make sure that the allow transparency is set to true, vertical and horizontal alignments are centered, and the height and width are set to Auto.
For example:
<Popup Name="popup1" Placement="Top" PlacementTarget="{Binding ElementName=button2}" AllowsTransparency="True" Height="Auto" Width="Auto" Panel.ZIndex="1" HorizontalOffset="-5" HorizontalAlignment="Center" VerticalAlignment="Center">
<StackPanel Height="92" HorizontalAlignment="Left" Margin="93,522,0,0" Name="stackPanelPop" VerticalAlignment="Top" Width="147">
</StackPanel>
</Popup>
Another possible cause:
using IsOpen="True" in markup before AllowTransparency="True"
Switching the order fixes it.
My guess is that the CircularProgressBar is actually causing the Black background. The only other way that this could happen is if there was a Style or something set on one of the controls (Popup or StackPanel or...).
Here is a quick-n-dirty example that shows a TextBlock in a popup when a checkbox is checked. The colors chosen are just to make sure things stand out visually:
<StackPanel x:Name="stackPanelLayout">
<StackPanel.Background>
<RadialGradientBrush Center="0.75, 0.75"
SpreadMethod="Reflect">
<GradientStop Color="LightBlue" Offset="0" />
<GradientStop Color="SeaGreen" Offset="0.5" />
<GradientStop Color="MidnightBlue" Offset="0.75" />
</RadialGradientBrush>
</StackPanel.Background>
<CheckBox x:Name="chkShowPopup"
FontSize="20"
Foreground="White"
Content="Show Popup" />
<Popup PlacementTarget="{Binding ElementName=stackPanelLayout}"
Placement="Center"
IsOpen="{Binding ElementName=chkShowPopup, Path=IsChecked}"
Name="m_popWaitNotifier"
PopupAnimation="Slide"
AllowsTransparency="True">
<StackPanel Orientation="Vertical" Background="Transparent">
<TextBlock Foreground="White" FontSize="30" FontWeight="Bold" Text="PopUp" />
</StackPanel>
</Popup>
</StackPanel>
So, two tests you can do to determine what is happening:
Replace the CircularProgressBar with a simple TextBlock or other control that you don't have a Style applied to.
Put the CircularProgressBar as a standalone control somewhere on your window, or on an otherwise blank test Window.
As per this article Why is my WPF Popup black and how do I get it positioned properly?
:
You need to set the AllowsTransparency property on the Popup to True, and set the PlacementTarget and Placement properties to control the position the Popup opens in.
As per the code in question:
<Popup PlacementTarget="{Binding ElementName=parentStackPanel}" Placement="Center" IsOpen="False" Name="m_popWaitNotifier" PopupAnimation="None" AllowsTransparency="False">
<StackPanel Orientation="Vertical" Background="Transparent">
<uc:CircularProgressBar x:Name="CB" StartupDelay="0" RotationsPerMinute="20" Height="25" Foreground="White" Margin="12"/>
</StackPanel>
</Popup>
the PlacementTarget is set to parentStackPanel, whereas the questioner has mentioned:
Hi Svetlozar: I tried this but it does
not work. For me though I do not have
a StackPanel outside the Popup, but I
have a StackPanel within the Popup
that holds a couple of control on it
The problem could be that Popup could not find the PlacementTarget 'parentStackPanel' because it does not exist.
The problem is that the grid is not orientation places it outside of the popup.
Remove VerticalAlignment and horizontalAlignment from all the controls inside the popup, and it will work correctly
Quite old, but may help someone: Add InitializeComponent(); in the constructor, it solved my problem:
class MyPopupClass : Popup {
/*
...
*/
public MyPopupClass () {
InitializeComponent();
/*
...
*/
}
/*
...
*/
}
I have set a canvas' background to an image of a company logo. I would like for this image to be aligned to the bottom right corner of the canvas.
Is it possible to do this, or would it require for the image to be added into the canvas as a child? That would not work with this program as all children of the canvas are handled differently.
Thank You
Will this work? (It worked for me, anyway.)
<Canvas>
<Canvas.Background>
<ImageBrush ImageSource="someimage.jpg" AlignmentX="Right"
AlignmentY="Bottom" Stretch="None" />
</Canvas.Background>
</Canvas>
AFAIK The WPF Canvas needs child UI elements to be positioned using absolute co-ordinates.
To achieve the right-bottom-anchored effect, I think you'd need to handle the window resize event, recalculate and apply the Top,Left co-ordinates for the child Image element to always stick to the right buttom corner.
<Window x:Class="HelloWPF.Window1" xmlns...
Title="Window1" Height="300" Width="339">
<Canvas>
<Image Canvas.Left="195" Canvas.Top="175" Height="87" Name="image1" Stretch="Fill" Width="122" Source="dilbert2666700071126ni1.gif"/>
</Canvas>
</Window>
How about containing the canvas and image inside of a Grid control like so?
<Window ...>
<Grid>
<Canvas/>
<Image HorizontalAlignment="Right" VerticalAlignment="Bottom" .../>
<Grid>
</Window>
This is my solution using a border inside the canvas to align the image. This solution works well when canvas is resized:
<Canvas x:Name="MiCanvas" Height="250" Width="500" Background="Aqua">
<Border x:Name="MiBorderImage"
Width="{Binding ElementName=MiCanvas, Path=ActualWidth}"
Height="{Binding ElementName=MiCanvas, Path=ActualHeight}"
Background="Transparent">
<Image x:Name="MiImage" Source="/GraphicsLibrary/Logos/MiLogo.png"
HorizontalAlignment="Right"
VerticalAlignment="Bottom"
Stretch="None" />
</Border>
</Canvas>