Scrollviewer to Display a Bigger Image on Windows Phone - c#

I need to display a bigger image at original scale on a Windows Phone 8.1 App.
tried
ScrollViewer
and ViewBox.
None of them seems to work fine.
I want something like when an image is displayed in an html page, scrollable , movable, etc.
Any Idea whether it can be done without embedding a webbrowser ?
<Grid>
<ScrollViewer>
<Image Source="Assets/MyImage.png" Stretch="None" />
</ScrollViewer>
</Grid>


ScrollViewer is designed to handle content that is bigger than the surrounding container.You can scroll image by put image in grid try like this
<ScrollViewer>
<Grid>
<Image Source="Assets/MyImage.png" Stretch="None" />
</Grid>
</ScrollViewer>
In case if Grid is much smaller than the Scroll-viewer then try by giving height and width attribute to scroll viewer

Related

Can a scrollviewer be added to a relative panel?

Is it possible to add a scrollviewer to relative panel in UWP? I tried and it does not seem to be working at all. I need the scrollviewer to make sure all the controls on the screen are shown when i change the orientation of the phone.

I was also facing the same situation, what I did may helps you,
I put RelativePanel inside ScrollViewer and your ScrollViewer will be in a Grid. VisualStateManager thing will come in Grid not in RelativePanel.
Like below :
<Grid>
<VisualStateManager.VisualStateGroups>
...
</VisualStateManager.VisualStateGroups>
<ScrollViewer>
<RelativePanel>
...
</RelativePanel>
</ScrollViewer>
</Grid>

WPF: Image stretched when placed in StackPanel in button

I'm making a sort-of toolbar in WPF (StackPanel containing Buttons containing StackPanels containing Images and TextBlock...)
Here is the code for one button :
<Button x:Name="btnGraph" FontWeight="Normal" Background="{DynamicResource accentColor}" BorderBrush="{DynamicResource accentColor}">
<StackPanel>
<Image Source="Resources/diagnostic_chart1.png" Stretch="None"/>
<TextBlock HorizontalAlignment="Center" Text="Graph"/>
</StackPanel>
</Button>
As you can see, the image in the button is stretched, but the same image code outside the button (in the container StackPanel), it works correctly : image
I've tried a lot of things, but nothing worked.
Is there a way to make it works ?
EDIT: I also tried changing the DPI of images from 72 to 96, no effect.

The image doesn't look stretched to me; the size seems right. It actually looks like it's rendering across pixel boundaries, giving it a blurred appearance. Try setting UseLayoutRounding="True" on your root visual.

Images in grid should get largest size as possible

In my Windows Phone app, I need to have a maximum of 4 pictures horizontal next to each other. The images have always same width/height. Of course the width and also the height of the grid depends on screen. In case there are just 2 pictures, they should scale up to fill the space available. In case there are 4 they have to scale down.
How can I do this on xaml?

Put the images into a horizontal StackPanel inside a Viewbox:
<Viewbox>
<StackPanel Orientation="Horizontal">
<Image Source="http://tile.openstreetmap.org/1/0/0.png"/>
<Image Source="http://tile.openstreetmap.org/1/1/0.png"/>
<Image Source="http://tile.openstreetmap.org/1/0/1.png"/>
<Image Source="http://tile.openstreetmap.org/1/1/1.png"/>
</StackPanel>
</Viewbox>

Zooming into image in Windows Store apps

I have a ScrollViewer with an Image Control in it. It displays a rather large image. I want my user to be able to zoom into the image using gestures. I therefore enabled the ZoomMode on the Scrollviewer. However the Scrollviewer automatically scrolls back to the left "edge" of the image whenever the user releases its finger, making effectively zooming in and out of the image impossible.
This is the Template i am using:
<DataTemplate x:Key="SingleItemTemplate">
<ScrollViewer ZoomMode="Enabled">
<Grid Margin="5,0,5,0">
<Image Source="{Binding ImageUrlHighRes}">
</Image>
</Grid>
</ScrollViewer>
</DataTemplate>
How can i solve this problem?

You need to enable the horizontal scrolling as well (turned off by default)
HorizontalScrollBarVisibility = "Auto"

Silverlight zoom area with canvas and scrollview

I have simple canvas with items and i need to add for scroll view as parent for my canvas.
But i fased with problem that after set
canvas.RenderTransform=new ScaleTransform(){...}
Scroolbars not appears or working not correctly.
Will be glad for any information.

The render transform occurs much later in the UI rendering process. It ultimately performs a matrix transform on controls rendering. The scroll viewer will be completely unware of this transform, its scrollbars will be based on the un-transformed size of the original Canvas.
The silverlight toolkit contains a LayoutTransformer control. This control applies a transform to its content as part of the layout process and reports the post-transform size as its desired size.
Consider this:-
<ScrollViewer Width="200" Height="200" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<toolkit:LayoutTransformer>
<toolkit:LayoutTransformer.LayoutTransform>
<ScaleTransform ScaleX="2" ScaleY="2" />
</toolkit:LayoutTransformer.LayoutTransform>
<Canvas Width="150" Height="150" Background="Aquamarine">
<Rectangle Fill="Blue" Canvas.Top="10" Canvas.Left="10" Width="30" Height="30" />
</Canvas>
</toolkit:LayoutTransformer>
</ScrollViewer>
Whilst the Canvas has a size (150) smaller than the containing scroll viewer (200), it is scaled so that it would be larger (300). The LayoutTransformer reports its desired size as 300, the post-transform size of the canvas. Hence the ScrollViewer displays scroll bars to accomodate it. Without the benefit of the LayoutTransformer the ScrollViewer would only see the Canvas as having a size 150 despite any applied RenderTransform.

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