My question is about to drag and drop functionality in Silverlight 5
<Grid Canvas.Left="75" Canvas.Top="130" Background="Transparent" Width="595" MaxWidth="595" Canvas.ZIndex="4" >
<StackPanel x:Name="MainSP" Background="Transparent" Orientation="Horizontal" HorizontalAlignment="Center">
<StackPanel x:Name="StackPanelGroup1" Tag="Group1" MinHeight="129" Orientation="Vertical" VerticalAlignment="Bottom" HorizontalAlignment="Center">
<Canvas x:Name="CanvasGroup1" Tag="Group1" HorizontalAlignment="Stretch" >
<Button x:Name="ToGroup1" Tag="Group1" Cursor="Hand" Click="ToGroup1_Click" Height="20" Canvas.Left="0" Canvas.Top="20" Content="Add Here" Visibility="Collapsed" Canvas.ZIndex="4" />
<!--<this:CustomCard x:Name="myCustomCard" Canvas.Left="0" Canvas.Top="0" HorizontalAlignment="Center" DiscardCard="myCustomCard_DiscardCard" FinishCard="myCustomCard_FinishCard" MouseLeftDown="myCustomCard_MouseLeftDown" >
</this:CustomCard>-->
</Canvas>
</StackPanel>
</StackPanel>
I am having XAML structure like thi, there will will up to 7 group for StackPanel and Canvas also.
Now wehen I will get 13 card from server in different group I will dynamically add them to respective canvas group.
Issue is MainSP is 7 group of StackPanel and Canvas now their Canvas's default ZIndex property will be assigned autometically like CanavsGroup1 has 1, and CanvasGroup2 has 2 ans so on...
When I want to drag card from CanvasGroup3 it is draggable all over screen and CanvasGroup 1 and 2 but when I tries to drag it over CanvasGroup4 or 5 it's not working.
I think it's ZIndex property issue.
I tried somany things to give Zindex property of Card and Canvas to max zindex property but then also it's not working.
Is there any solution that I can move card without using Canvas? or bring that Card to front(top) while dragging?
Related
I'm working on a UWP Windows 10 app with a XAML UI. One of my pages requires that images fill the height of the window (or screen in tablet mode) and uniformly scale as one long row of images from left to right (going off-screen). I've got this set up perfectly using ViewBoxes for the images inside of a StackPanel set to a Horizontal Orientation like so:
<StackPanel Orientation="Horizontal">
<Viewbox>
<Image Source="http://lorempixel.com/200/200/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/400/600/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/700/700/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/100/300/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/100/500/" />
</Viewbox>
</StackPanel>
The intention is for the images to flow off-screen with a horizontal scroll that allows the user to pan from left to right to see the gallery of images as one long row.
I've tried enabling HorizontalScrollMode on the parent StackPanel like so:
<StackPanel Orientation="Horizontal" ScrollViewer.HorizontalScrollMode="Enabled">
But this did not enable any scrolling at all.
I also tried to wrap everything inside of a ScrollViewer like so:
<ScrollViewer HorizontalScrollMode="Enabled">
<StackPanel Orientation="Horizontal">
<Viewbox>
<Image Source="http://lorempixel.com/200/200/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/400/600/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/700/700/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/100/300/" />
</Viewbox>
<Viewbox>
<Image Source="http://lorempixel.com/100/500/" />
</Viewbox>
</StackPanel>
</ScrollViewer>
But this completly breaks my ViewBox layout by shrinking all the images so they fit within a small portion of the screen and no longer fill the window/tablet height.
I've tried a number of other variations with similar results. Does anyone have some suggestions for solving this? Let me know if you need more info.
You do need a ScrollViewer to enable scrolling, although you might need to set a few properties to make it only scroll horizontally as mentioned in Windows 8 ListView with horizontal item flow
ScrollViewer.HorizontalScrollBarVisibility="Auto"
ScrollViewer.VerticalScrollBarVisibility="Disabled"
ScrollViewer.HorizontalScrollMode="Enabled"
ScrollViewer.VerticalScrollMode="Disabled"
ScrollViewer.ZoomMode="Disabled"
Now the Viewbox is not the most controllable... control. You could try using the
SquareGrid panel from my toolkit instead of the Viewboxes. Maybe simplify it a bit. If that isn't enough - you could add some bindable properties that would update when the size of your window changes and bind the Width and Height of these images to these properties. Note that you can't use ActualWidth or ActualHeight because these don't raise change notifications on size changes.
<GridView x:Name="ImageGridView"
SelectedItem="{x:Bind ViewModel.SelectedLocation, Mode=TwoWay}"
Margin="10,0"
ScrollViewer.VerticalScrollBarVisibility="Disabled"
ScrollViewer.HorizontalScrollBarVisibility="Auto"
ScrollViewer.VerticalScrollMode="Disabled"
ScrollViewer.HorizontalScrollMode="Auto"
Grid.Row="4" Grid.ColumnSpan="5"
ItemsSource="{x:Bind ViewModel.CheckedLocations}"
ItemContainerStyle="{StaticResource PinsGridViewItemStyle}"
ItemTemplate="{StaticResource ImageOverlayGalleryFolderDataTemplate}" >
<GridView.ItemsPanel>
<ItemsPanelTemplate>
<ItemsWrapGrid MaximumRowsOrColumns="1"/>
</ItemsPanelTemplate>
</GridView.ItemsPanel>
</GridView>
This is my code to show 1 row of photos. You can adjust by the MaxiumRowsOrColumns. Also note that both HorizontalScrollBarVisibility and HorizontalScrollMode are present to custom as you want to.
I created a grid and inside this grid it contains a TextBlock. When I maximize or adjust the size of the window the content of the TextBlock doesn't stay in the center of the Grid.
Tried to keep this as short as possible. :>
<Grid>
<Grid HorizontalAlignment="Left" Height="46" VerticalAlignment="Top" Width="515">
<TextBlock VerticalAlignment="Center" HorizontalAlignment="Center">Welcome! Use the functionalities below.</TextBlock>
</Grid>
</Grid>
Grids, by default, auto expand. That is, they take up as much area as they are allowed. Your outer grid will take up the entire client area of the window while the inner grid will stick to the top left of the outer grid, just as you have coded it to. If you want the inner grid to be centered, then do something like
<Grid>
<Grid HorizontalAlignment="Center" VerticalAlignment="Center" Height="46" Width="515">
<TextBlock VerticalAlignment="Center" HorizontalAlignment="Center">Welcome! Use the functionalities below.</TextBlock>
</Grid>
</Grid>
You don't even have to include the horizontal and vertical alignment as grids will automatically centre.
If you just want to centre the TextBlock ...
<Grid>
<Grid>
<TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" Height="46" Width="515">Welcome! Use the functionalities below.</TextBlock>
</Grid>
</Grid>
The text can be centred using the TextAlignment property.
I hope this helps
Hopefully this is a WPF issue and not a esri issue. I have an ESRI map control, and I am placing a control on top of the map. When I do this, the map no longer receives input(I can't move around or click anything). If I modify the z-index of the top control to place it behind the map, the map works fine again.
<Grid Name="MapGrid" DockPanel.Dock="Top" >
<Grid Name="MapGrid" DockPanel.Dock="Top" >
<esri:MapView x:Name="MainMapView" Panel.ZIndex="0" KeyDown="MyMapView_KeyDown" MapViewTapped="MyMapView_MapViewTapped" Map="{Binding Source={StaticResource MapResource}}" WrapAround="True" Grid.Row="0" Grid.Column="0" Initialized="MyMapView_Initialized" >
</esri:MapView>
<Expander Header="Properties" ExpandDirection="Right" Panel.ZIndex="-1">
<ItemsControl Background="Transparent" Height="700" Width="500" HorizontalAlignment="Left" VerticalAlignment="Top" Name="FeaturePropertyRegion" cal:RegionManager.RegionName="FeaturePropertyRegion" />
</Expander>
</Grid>
This code works, but if I raise the ZIndex of the Expander pannel, the map no longer receives input. I am assuming the issue has to do with the visual tree of WPF, and how input cascades down. Any ideas on what the issue could be? Thanks.
EDIT
The issue seems to be with the expander, as the map works if I remove the expander and just have the ItemsControl.
Try :
<Expander IsHitTestVisible="False">
<ItemsControl />
</Expander>
It doesn't seem to be a problem with extender, which would be very wired if it did
I tried this :
<Grid>
<Button />
<Expander HorizontalAlignment="Left" ExpandDirection="Right" VerticalAlignment="Top">
<Rectangle Fill="Red" Stretch="Fill" Width="525" Height="350"/>
</Expander>
</Grid>
Here is what I tried to to:
Added a stackpanel to my window (Orientation: Horizontal)
Added a set of buttons to it
Set the first button's ZIndex to be higher than the second one
Increased the width of the first button
What I expected:
I expected the first button to be on top of the second button (atlest overlay)
StackPanel's width should not change unless the width of the first button is no more sufficient
What is happening actually:
First button's width increases and the second button moves towards the right accordingly. They stay on the same plane
StackPanel's width increases with increase in the first button's width
Here is my question:
I know that stackpanel has not considered ZIndex while arranging the items within itself, BUT WHY?? Shouldn't it consider the ZIndex of its children while arranging them???
The Stackpanel 'stacks' its children based on their widths, i.e. if you increase the width of an item (or increase its margin), the stackpanel will simply expand to accomodate this. If you want to force items within a stackpanel to overlap, you will have to change their location after the layout has been computed. You can perform this using a RenderTransform. See the example below:
<StackPanel Orientation="Horizontal" VerticalAlignment="Top">
<Button Content="One" Canvas.ZIndex="10">
<Button.RenderTransform>
<TranslateTransform X="10"/>
</Button.RenderTransform>
</Button>
<Button Content="One"/>
<Button Content="One"/>
<Button Content="One"/>
</StackPanel>
And yes, the ZIndex is respected. This is an attached proepry of Canvas, however, it seems to be used by the rendering engine directly rather than by Canvas, hence it works in the above code.
I tried to find some relevant info about how to set the z index of wpf layout elements and panels. Using a Canvas comes with a different set of positioning issues which I simply hadn't the time to investigate. Here is a simple solution using the Panel.ZIndex property in xaml.
<Grid>
<Border Width="100" Height="100" Margin="0,0,50,50" Panel.ZIndex="1" Background="Navy" Opacity="0.3"
VerticalAlignment="Top" HorizontalAlignment="Left">
</Border>
<Border Width="100" Height="100" Margin="50,50,0,0" Background="Fuchsia" Opacity="0.3">
</Border>
The resulting two square border elements will overlap. One can use stackpanels instead of borders and use this logic to overlap anything easily.
Here is the same code adapted to the button problem:
<Grid>
<StackPanel Panel.ZIndex="10" Margin="20,20,0,0" HorizontalAlignment="Left">
<Button Content="One" Width="50" Height="40">
</Button>
</StackPanel>
<StackPanel Orientation="Horizontal" Margin="50,0,0,0" >
<Button Content="Two" Width="50" Height="40"/>
<Button Content="Three" Width="50" Height="40"/>
<Button Content="Four" Width="50" Height="40"/>
</StackPanel>
</Grid>
Let's say I want to position an element at the coordinates x=20, y=5 within the 3rd column of a Grid control. How do I do this? Do I need to add a Canvas panel to the column and then add the controls to it?
You can do it that way, but have a look at this..
Attached Property
<Grid Background="Yellow">
<Rectangle Fill="Red" Margin="20,10,0,0" Width="50" Height="30"
HorizontalAlignment="Left" VerticalAlignment="Top" />
<Rectangle Stroke="Green" Margin="30,15,0,0" Width="20" Height="30"
HorizontalAlignment="Left" VerticalAlignment="Top" />
</Grid>
You can use the Margin property to simulate absolute positioning.
Not sure whether this would help you, but in any case an interesting read.