I am new to WPF and xaml and I have a problem with my apps UI.
I am using this xaml code:
<ScrollViewer HorizontalAlignment="Left" Margin="252,12,0,0" Name="captchaControlsScrollableContainer" VerticalAlignment="Top">
<Grid Name="captchaControls" Width="339" Height="286">
</Grid>
</ScrollViewer>
And this code behind code that populates the grid:
captchaControls.Children.Add(new Captcha(data));
which is called more than one time
My problem is that only the first user control app apperas in the grid although in the debugger captchaControls.Children.Count is the right size and the scrollviewer's scrollbar is disabled.
Does anyone have any idea what I am doing wrong? Thank you in advance.
Your Grid in the scrollviewer is set to have 1 column and 1 row.So you will see only the last one you add so far (all others controls are "below" the last).
Take a look to the StackPanel control and maybe this tutorial will be useful.
Related
I have a TabControl,inside one Tabitem, i have a grid and my userControl inside the grid:
<TabControl>
<TabItem>
<Grid HorizontalAlignment="Left" Height="64" Margin="288,150,0,0" VerticalAlignment="Top" Width="354">
<Canvas>
<local:MyCustomComboBox x:Name="ucc1" HorizontalAlignment="Left" Grid.RowSpan="2" Grid.ColumnSpan="3" Height="30" VerticalAlignment="Top" Width="194" ClipToBounds="True"/>
<Canvas>
</Grid>
<TabItem>
<TabControl>
By default,when the userControl's size is greater than the grid's/TabItem's size,the extra portion can't be seen.How can i make my UserControl overlap it ? I tried to add RowSpan and ColumnSpan but it didn't work :(
TabItem has it's own bounds which u cannot overlap.So,there's no way u can achieve your goal ... But i always try my best to help people, so here's a quick tip :
If the usercontrol is bigger than the gird
Your userControl XAML includes MyCustomComboBox, which makes me think it is a combobox..I've seen your previous post where you wanted to customize your combobox but couldn't quite achieve your goals...So, are you trying to create you own custom combobox and by usercontrol bigger than the grid , did u mean that the drop down menu u created doesn't go outside the grid rather is clipped to the grid ??
If this is the case , u can use a ContextMenu and move your custom drop-down list there.Then the contextMenu will overlap both the TabItem and Grid as it is a window itself.
Also , NOTE that u cannot use Named content in usercontrol(u can but that requires a workaround).So i suggest you to add all required code behinds , even set required binding from the user-control's code behind.
Hope this helps :)
I have a usercontrol with grid as content panel, which loads its content from datatemplate, specified in xaml where usercontrol is used.
I am using this usercontrol widely and everything is fine with standard xaml controls in template.
now I am trying to show some charts in this control with OxyPlot
<DataTemplate x:Key="SomeChart">
<Grid x:Name="oxyGrid" >
<oxy:PlotView x:Name="oxyChart" Model="{Binding model}" />
</Grid>
</DataTemplate>
I initialize data model for the chart in usercontrol_loaded
but the chart will not be shown until I manually call InvalidateMeasure for it.
if I call invalidatemeasure from usercontrol_loaded , it will not help.
if I call invalidatemeasure from any point when chart is on the screen - it helps and chart will shows up.
currently, I found that I can call invalidatemeasure in usercontrol_layoutupdated handler but don't like as it fires too often
and requires code outside of usercontrol.
if I try to handle event layoutupdated inside usercontrol and call invalidatemeasure (for oxychart) from there, I am getting "Layout cycle detected. Layout could not complete."
any ideas about what's wrong and how to fix :)
will be greatly appreciated
thanks in advance
ilya
never hurry to post questions :)
just necessary to call UpdateLayout() in usercontrol after loading template
private void spContentPanel_Loaded(object sender, RoutedEventArgs e)
{
LoadTemplate();
UpdateLayout();
}
where spContentPanel is just Grid for template loading
<Grid Grid.Row="1" Name="spContentPanel" Loaded="spContentPanel_Loaded"
HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
</Grid>
I want to view the content of a textblock that was added last. It means I want to auto scroll to the end and view the hidden content when I add more text... just like in Windows calculator.
In the calculator when I enter more numbers it shows only the numbers entered last. Previously entered numbers are hidden when there is not enough space. I want to do the exact same thing..
Can someone please help me?
I don't think TextBlocks can scroll. You can put the TextBlock in a ScrollViewer.
XAML:
<ScrollViewer Name="MyScrollViewer">
<TextBlock TextWrapping="Wrap">
A bunch of text
</TextBlock>
</ScrollViewer>
Code-behind:
MyScrollViewer.ScrollToBottom();
It appears that if you have multiple TextBlocks in a ListBox, you cannot get access very easily to it's ScrollViewer to accomplish the same thing. If you are doing this, change your ListBox to an ItemsControl and put that into a ScrollViewer. I think you'll lose selection ability though.
If you do need to use a ListBox, then you can get the view that belongs to the last item and call the ListBox's ScrollIntoView() method. See this or this for a little bit about that, but you might have to do a little more research.
Do you mean a TextBox, as opposed to a TextBlock? The default behavior for a TextBox is to show the most recent text as more text is entered.
Window x:Class="textboxscrolltest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TextBox Width="75" Height="25"/>
</Grid>
</Window>
I want a TextBox with line numbers. So I decided to use one small TextBox for the line numbers on the left and another big one on the right for the text.
My problem now is that I put these two TextBoxes into a Dockpanel and I need a height difference because the TextBox for the line numbers should not have scrollbars. So I need to shorten the left TextBox. My plan is to put an empty StackPanel below the left TextBox. And I'm getting trouble because the DockPanel doesn't sort my controls like I want. The only way I got it was using a fix width but I don't want that!
Or should I go a complete different way?
I don't know why you have to build this control, but you can find something similar for WPF. See this link AvalonEdit. It's a text editor control.
If you don't want a scroll bar on a control, just set the VerticalScrollBarVisibility to disabled.
But I'm not sure that's exactly what you need. If you do this then obviously your line numbers aren't going to scroll with your text box. You best bet might be to put your two textboxes (although if the line numbers aren't supposed to be editable, you might want to use labels instead) in a dockpanel and wrap the dock panel in a scrollviewer.
You may try to use ScrollView. The code below demonstrates the idea. But I haven't come up with a solution to enable horizontal scrolling.
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<ScrollViewer Height="100">
<DockPanel>
<TextBlock DockPanel.Dock="Left">
<TextBlock.Inlines>
1<LineBreak/>
2<LineBreak/>
3<LineBreak/>
4<LineBreak/>
5<LineBreak/>
6<LineBreak/>
7<LineBreak/>
8<LineBreak/>
9<LineBreak/>
10<LineBreak/>
11<LineBreak/>
12<LineBreak/>
13<LineBreak/>
</TextBlock.Inlines>
</TextBlock>
<TextBox AcceptsReturn="True" TextWrapping="Wrap">
I want a TextBox with line numbers. So I decided to use one small TextBox for the line numbers on the left and another big one on the rigth for the text. My problem now is that I put these two TextBoxes into a Dockpanel and I need a Heigth difference because the TextBox for the line numbers should not have scrollbars. So I need to short the left TextBox. My plan is to put an empty StackPanel below the left TextBox. And I'm getting trouble because the DockPanel doesen't sort my controls like i want. The only way I got it was using a fix width but I don't want that!
</TextBox>
</DockPanel>
</ScrollViewer>
</Grid>
</Window>
It looks like
So I have a Panorama control and the PanoramaItems are programmatically added to the control using the following template.
<UserControl>
<Grid x:Name="LayoutRoot">
<controls:PanoramaItem Name="sitePanoramaItem" Header="{Binding Name}">
<Controls:DockPanel VerticalAlignment="Stretch">
<StackPanel Orientation="Horizontal" Margin="0,10,0,0" Controls:DockPanel.Dock="Top">
<Image Source="../Images/action.png" Width="64" />
<TextBlock Text="{Binding Stats, Mode=TwoWay}" FontSize="45" Margin="15,0,0,0" />
</StackPanel>
<Grid x:Name="graphCanvas" HorizontalAlignment="Stretch" Margin="10,10,10,10"> </Grid>
</Controls:DockPanel>
</controls:PanoramaItem>
</Grid>
</UserControl>
When I click on graphCanvas what I'd like to do is sorta pop the graphCanvas out and display that fullscreen then when I click again restore it to where it was. I've been all over this site and Google and can't find anything similar to what I'm looking for.
I would still like to maintain the Panorama control functionality so that the graphCanvas is still the only one visible but you can cycle through them. Currently I have it sorta working in that I remove the Grid from the DockPanel and put it directly in the LayoutRoot while making the sitePanoramaItem collapsed. However, it's not fullscreen as the Panorama name is still visible (I guess I could hide that as well...) When I put the graphCanvas back int he DockPanel the size of the canvas is all screwed up.
I was hoping there was a simpler way.
Is it even possible?
It is possible to create the UI you describe but it's not going to be simple. You're on the right track with removing it in code and adding it the LayoutRoot and making the Panorama hidden. However you would have to code the scrolling behavior yourself and that is going to be quite tricky - especially making it feel the way to panorama does.
One trick you could try is actually layer a PivotControl on top of your Panorama and have it be collapsed by default. Also edit it's template to remove all default content eg: remove the header control, set margins to 0, etc). Then when you want to go full screen you can remove all the graphCanvases from the Panorama items and and add them to new PivotItems in the PivotControl. Then hide the Panorama and show the Pivot. This will give you scrolling capability for free and the illusion of full screen.
Having said all that I'm not sure I would recommend this. The more common approach would be to simply be to navigate to another page when the user selects an item and handle the full screen aspects there (possibly using the Pivot control again for scrolling). And when you want to leave "fullscreen" mode simply navigate back to the first page. Handling Tombstoning of the fullscreen state will be much easier with this approach for one thing.
You can try making the graphCanvas a Page and putting it in a different XAML. Then add a frame (name it InnerFrame for example) in the same place where you have the graphCanvas right now and navigate to that page with InnerFrame. When the frame is clicked, you navigate with the RootFrame of the app to your graphCanvas page. When you decide to close it, just navigate back with the RootFrame.
Hope it's clear enough :)
Edit:
Navigation in WP7 works very similar as the standard navigation in Silverlight 4, but it's a bit more restrictive. Just throw a PhoneApplicationFrame in your XAML like this:
<phone:PhoneApplicationFrame x:Name="Frame" />
This is basically the same as a Silverlight frame. All the pages you create inherit from PhoneApplicationPage by default, so they can be showed in a frame without any changes.
Your whole application actually runs on a PhoneApplicationFrame. If you take a look at your App class you will see this:
public PhoneApplicationFrame RootFrame { get; private set; }
Here's the MSDN documentation for the navigation system on WP7