This is more of XAML question for silverlight.
<Mobile:DevicePushpinTemplateSelector
m:MapLayer.Position="{Binding Location}"
ZoomLevel="{Binding ZoomLevel, ElementName=MainMap}"
Content="{Binding}">
<Mobile:DevicePushpinTemplateSelector.DotTemplate>
<DataTemplate>
<Ellipse Width="8" Height="8" Stroke="Black" Fill="{Binding IsGPSDataRecent, Converter={StaticResource BoolToGreenRedBrushConverter}}" StrokeThickness="1">
<ToolTipService.ToolTip>
<TextBlock Text="{Binding DisplayId}" />
</ToolTipService.ToolTip>
</Ellipse>
</DataTemplate>
</Mobile:DevicePushpinTemplateSelector.DotTemplate>
<Mobile:DevicePushpinTemplateSelector.NumberedTemplate>
<DataTemplate>
<Border x:Name="border" Background="{Binding IsGPSDataRecent, Converter={StaticResource BoolToGreenRedBrushConverter}}" BorderBrush="Black" BorderThickness="2" Padding="2" Height="20" CornerRadius="8">
<TextBlock VerticalAlignment="Center" Text="{Binding DisplayId}" />
</Border>
</DataTemplate>
</Mobile:DevicePushpinTemplateSelector.NumberedTemplate>
</Mobile:DevicePushpinTemplateSelector>
On XAML above I have 2 different templates based on map zoom level. When it is zoomed out - it shows smaller ellipse, when user zooms closer - I increase size of pushpin.
2 issues:
WIth a lot of pushpins it get's really slow, I beleive it's due to template selection.
I want it to be different. I want to create "IsSelected" property so all pushpins will be the same on all zoom levels but when user clicks on pushpin - it expands in size.
I wonder how do I code "selection" part. I want only one pushpin to be selected at time. I can bind to property and make pushpin parts visible/invisible but I'm not sure how to code "selection" piece. Should it be Button?
When doing a windows phone app I had the issue of many pins causing "lag" the easiest way around that is to only show pins within a certain radius of the centre of the map and remove the others until they come into the radius.
Cheers
Mark
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've got the following control template which I use as a Validation.ErrorTemplate for TextBoxes:-
<ControlTemplate x:Key="ControlValidationErrorTemplate">
<DockPanel LastChildFill="True">
<Border Background="Red"
DockPanel.Dock="right"
Padding="2,0,2,0"
ToolTip="{Binding ElementName=valAdorner, Path=AdornedElement.(Validation.Errors), Converter={x:Static val:ValidationErrorsConverter.Instance}}">
<TextBlock Text="!"
VerticalAlignment="center"
HorizontalAlignment="center"
FontWeight="Bold"
Foreground="white" />
</Border>
<AdornedElementPlaceholder x:Name="valAdorner"
VerticalAlignment="Center">
<Border BorderBrush="red"
BorderThickness="1" />
</AdornedElementPlaceholder>
</DockPanel>
</ControlTemplate>
When a TextBox contains invalid content, the above template applies a red border and adds a red box containing an exclamation mark immediately to the right of the TB.
The problem is, the exclamation mark overlaps anything immediately to the right of the TB, rather than the layout changing to accomomodate the exclamation mark. I have a similar problem in DataGrids - the exclamation mark overlaps the right-hand edge of the containing cell, rather than the column width increasing to accommodate it.
Using Snoop, it appears that the template is being displayed in an "adorner layer" which I assume is a separate visual tree? This would explain why the window's layout isn't recalculated to take into account the exclamation mark. Can anyone suggest a way to achieve what I want?
As I suspected, it's due to the error template being rendered on the adorner layer, so it doesn't affect the layout of the window. See: http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/9de3c9e5-5759-4f88-9184-175d3eaabdad/
I'm now using this control template instead:-
<ControlTemplate x:Key="ControlValidationErrorTemplate">
<Grid>
<Polygon Points="9,9 9,0 0,0"
Stroke="Red"
StrokeThickness="1"
Fill="Red"
HorizontalAlignment="Right"
VerticalAlignment="Top"
ToolTip="{Binding ElementName=valAdorner, Path=AdornedElement.(Validation.Errors), Converter={x:Static val:ValidationErrorsConverter.Instance}}" />
<AdornedElementPlaceholder x:Name="valAdorner"
VerticalAlignment="Center">
<Border BorderBrush="red"
BorderThickness="1" />
</AdornedElementPlaceholder>
</Grid>
</ControlTemplate>
This draws a red border around the control, with a small red triangle overlapping the top-right corner of the control - hovering over this displays a tooltip containing the error message.
I am developing an application where i want to browse images like native WindowsPhone form.
I have used Pivot control. Everything works, but there is one unwanted thing. The image does not fill all display area. There is a gap on the top of page. I have set margin and padding everywhere where it is possible. And the result is still the same. :(
Here is my XAML code:
<!--LayoutRoot is the root grid where all page content is placed-->
<Grid
x:Name="LayoutRoot"
Background="Transparent"
Margin="0">
<toolkit:PerformanceProgressBar
VerticalAlignment="Top"
HorizontalAlignment="Left"
IsIndeterminate="{Binding IsBusy}"
Visibility="{Binding IsBusy, Converter={StaticResource BoolToVisibilityConverter}}"
/>
<controls:Pivot
x:Name="PhotoPivot"
ScrollViewer.HorizontalScrollBarVisibility="Auto"
IsHitTestVisible="True"
ItemsSource="{Binding Photos}"
Margin="0"
Padding="0"
>
<controls:Pivot.HeaderTemplate>
<DataTemplate/>
</controls:Pivot.HeaderTemplate>
<controls:Pivot.ItemTemplate>
<DataTemplate >
<controls:PivotItem
x:Name="PhotoPivotItem"
Margin="0"
>
<Image
x:Name="PhotoPicture"
Source="{Binding}"
Stretch="Uniform"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Margin="0"
/>
</controls:PivotItem>
</DataTemplate>
</controls:Pivot.ItemTemplate>
</controls:Pivot>
</Grid>
Are you talking about the system tray?
To remove the system tray use the following code:
shell:SystemTray.IsVisible="False"
Update:
I'm not real sure why that extra space is there.
I created a simplified version of your example and the only thing I could think of is to use negative margins. There is probably a better solution that I am just overlooking, but for now you can just use the following:
<controls:PivotItem x:Name="PhotoPivotItem" Margin="0,-10,0,0">
Although, from your posted image, it looks as if you have a bigger gap than I did, so you might need to decrease the margin.
I have an ItemsControl presenting a list of buttons. Each button has an image as it's content (png), but the image looks slightly different for each row.
The below image is magnified version of what I'm seeing:
Here is the xaml:
<ItemsControl ItemsSource="{Binding Items}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Name="tb1">hello</TextBlock>
<Button Height="{Binding ElementName=tb1, Path=ActualHeight}" Padding="0,-3,-3,-3" BorderBrush="Transparent" Background="Transparent" >
<Image Stretch="Fill" Source="stock_standard_filter.png" Margin="0">
</Image>
</Button>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
I've had a similar issue previously and was able to solve it using SnapsToDevicePixels="True", but that solution is not working this time. I've also tried UseLayoutRounding="True" and RenderOptions.EdgeMode="Aliased"
The height of the button is bound so the image will be stretched to fill the button. Because WPF uses doubles (1/96 inch units) there is bound to be some rounding off. SnapsToDevicePixels and Layout rounding might help when you use them on the StackPanel but as long as you stretch the image it will get blurred.
My best guess is to set "Stretch to None" and experiment with SnapsToDevicePixels and Layout rounding.
I have a Canvas element, contained within a ScrollViewer, which I'm zooming using ScaleTransform. However, I want to be able to keep the scroll position of the viewer focused on the same part of the canvas after the zoom operation has finished. Currently when I zoom the canvas the scroll position of the viewer stays where it was and the place the user was viewing is lost.
I'm still learning WPF, and I've been going backwards and forwards a bit on this, but I can't figure out a nice XAML based way to accomplish what I want. Any help in this matter would be greatly appreciated and would aid me in my learning process.
Here is the kind of code I'm using...
<Grid>
<ScrollViewer Name="TrackScrollViewer" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<Canvas Width="2560" Height="2560" Name="TrackCanvas">
<Canvas.LayoutTransform>
<ScaleTransform ScaleX="{Binding ElementName=ZoomSlider, Path=Value}"
ScaleY="{Binding ElementName=ZoomSlider, Path=Value}"/>
</Canvas.LayoutTransform>
<!-- Some complex geometry describing a motor racing circuit -->
</Canvas>
</ScrollViewer>
<StackPanel Orientation="Horizontal" Margin="8" VerticalAlignment="Top" HorizontalAlignment="Left">
<Slider Name="ZoomSlider" Width="80" Minimum="0.1" Maximum="10" Value="1"/>
<TextBlock Margin="4,0,0,0" VerticalAlignment="Center" Text="{Binding ElementName=ZoomSlider, Path=Value, StringFormat=F1}"/>
</StackPanel>
</Grid>
This is not a purely XAML way of doing it, but there is a very nice piece of work on Joeyw's blog titled Pan and Zoom (DeepZoom style) in WPF with links to the source. He has taken some inspiration from DeepZoom and it gives you smooth/animated panning and zooming of content. And if you're using WPF 4 you could probably modify it a little to add some easing functions to the animations to give it an even nicer feel.