I'm starting out the design of my app by using one of the templates provided with VS2012, where you have an Image displayed next to some TextBlocks. I want the user to be able to pick a photo or similar to be the image but, in the event that they haven't done this, I want to provide a default icon.
My initial thinking was to create PNGs of the different default icons, at the different sizes that the Image icons appear at and just return those from the binding if the user hasn't specified an image, but it occurred to me that if I can use XAML Paths instead, the default icons will appear crisper because they will be drawn as vectors rather than bitmaps.
I'm not sure if that decision is a mistake but it is causing me a few headaches :-(.
The first challenge I've tried to solve is how to use binding to display either an image or the XAML Paths. My solution here was to use a Button instead of the Image, and bind Content. The Content binding returns a Canvas object that either holds the Image or the set of Paths that define the icon.
That works until I change to the snapped view, which then has smaller Image/Button elements than the unsnapped view.
So the second challenge, and the primary reason for this question, is to seek advice on how best to deal with the differing sizes of the Buttons. In the unsnapped view, the Button is 110x110. In the snapped view, the Button is 60x60. In the research I've done, the simplest way to resize the paths seems to be to use a Transform on the Canvas but since the Canvas is being returned from the Binding call, the code-behind won't necessarily know what size the parent Button is and therefore won't be able to include the Transform.
I can't use a DrawingBrush because these aren't valid in Windows Store Apps.
Is there a clean solution to this or should I go back to the simpler but slightly lower quality solution of using pre-created PNGs?
Thanks.
The solution I adopted in the end was to use two items - a button and an image - each wrapped in a border that allowed me to make only one of the items visible, depending on whether or not a bitmap image was available:
<Border Background="{StaticResource ListViewItemPlaceholderBackgroundThemeBrush}" Width="250" Height="250" Visibility="{Binding ImageIsAvailable, Converter={StaticResource HideIfTrue}}">
<Button Content="{Binding ImageContent}" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="20,20,0,0" Style="{StaticResource UnstyledGraphicsButtonStyle}" Width="{Binding ImageWidth210}" Height="{Binding ImageHeight210}" Foreground="white" Padding="0" Background="Transparent" BorderBrush="{x:Null}" IsEnabled="False" />
</Border>
<Border Background="{StaticResource ListViewItemPlaceholderBackgroundThemeBrush}" Visibility="{Binding ImageIsAvailable, Converter={StaticResource DisplayIfTrue}}">
<Image Source="{Binding Image250}" Stretch="{Binding Stretch250}" AutomationProperties.Name="{Binding Title}" HorizontalAlignment="Center" VerticalAlignment="Center"/>
</Border>
In this example, I'm wanting the item to be 250px by 250px. The binding for Stretch is so that I can handle images that are bigger and smaller than 250px and stretch accordingly.
For the button, the content actually comes from a declared string resource, e.g.:
<x:String x:Key="building">M13.982995,32.651007L13.982995,37.332006 18.665994,37.332006 18.665994,32.651007z M5.3319988,32.440006L5.3319988,37.332006 10.225996,37.332006 10.225996,32.440006z M34.665606,29.33198L34.665606,37.313 37.332797,37.313 37.332797,29.33198z M29.332198,29.33198L29.332198,37.340984 31.999405,37.340984 31.999405,29.33198z M13.923995,24.000005L13.923995,28.740005 18.665994,28.740005 18.665994,24.000005z M5.3319988,24.000005L5.3319988,28.839005 10.171997,28.839005 10.171997,24.000005z M34.665606,18.665992L34.665606,26.684976 37.332797,26.684976 37.332797,18.665992z M29.332198,18.665992L29.332198,26.644998 31.999405,26.644998 31.999405,18.665992z M13.331995,16.000003L13.331995,18.666003 15.998995,18.666003 15.998995,16.000003z M7.9989967,16.000003L7.9989967,18.666003 10.665997,18.666003 10.665997,16.000003z M26.665998,13.331976L39.998998,13.331976 39.998998,42.666973 26.665998,42.666973z M13.331995,10.666002L13.331995,13.332002 15.998995,13.332002 15.998995,10.666002z M7.9989967,10.666002L7.9989967,13.332002 10.665997,13.332002 10.665997,10.666002z M10.665997,0L13.331995,0 13.331995,5.3340011 15.998995,5.3340011 18.665994,10.666002 18.665994,18.666003 21.331993,18.666003 23.998992,21.332004 23.998992,42.667007 0,42.667007 0,21.332004 2.6659985,18.666003 5.3319988,18.666003 5.3319988,10.666002 7.9969978,5.3340011 10.665997,5.3340011z</x:String>
This comes from Metro Studio.
The height and width bindings are because my different SVG items have different width & height ratios so I bind to code-behind to return the correct figures for the desired size. Unfortunately because you can't pass parameters, I end up with different "ImageHeightXXX" calls for different values of XXX depending on the XAML.
Advice on how to get the string defined can be found here: http://www.jayway.com/2012/11/27/styling-windows-8-4-the-button/
Related
I have been working around to find out solution for scrolling inside FlipView, however, the scrolling is not working properly. I am using SplitView template in my page and I have put FlipView inside Frame.
<Frame>
<FlipView ItemsSource="{Binding QuranPages}"
SelectedItem="{Binding QuranPageSelectedItem, Mode=TwoWay}"
Padding="20" FlowDirection="RightToLeft">
<FlipView.ItemTemplate>
<DataTemplate>
<ScrollViewer HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Auto">
<Image Stretch="UniformToFill"
Source="{Binding PageUri}"
MaxWidth="{Binding DataContext.PageWidth, ElementName=MyPage}"
MaxHeight="{Binding DataContext.PageHeight, ElementName=MyPage}">
</Image>
</ScrollViewer>
</DataTemplate>
</FlipView.ItemTemplate>
</FlipView>
</Frame>
In Page_SizeChanged event I am updating with page size with followings;
private void Page_SizeChanged(object sender, SizeChangedEventArgs e)
{
this.model.PageWidth = Window.Current.Bounds.Width; //e.NewSize.Width-10;
this.model.PageHeight = Window.Current.Bounds.Height; //e.NewSize.Height-10;
}
I don't understand why the scroll is not working properly, though it shows the scroll viewer, but it's not scrolling.
Update 1
I have noticed that it works well with other images, but it doesn't work with these images Image 1 Image 2 Image 3
Update 2
Here I have also added the scrollviewer Image and you can see half image is appearing, the other half is not appearing while the scrollivewer is at end.
My pictures are in PNG format, do I need to change their format?
Update 3
I have added the scrollviewer with Image. The scrollviewer seems Ok, but the image is not loaded properly.
Thanks!
I'm trying to create a simple application that allows the user to move an image with a TranslateTransform inside an Imagecontrol, using the ManipulationDeltaevent Handler.
However, performs the translate manipulation, the image is clipped in a weird way. In fact, it seems that it is the entire viewport which is translated instead of the image inside the viewport.
I have reproduced this behavior in this very simple application:
The code is straightforward and looks like so:
<Image
x:Name="Image"
HorizontalAlignment="Stretch"
VerticalAlignment="Stretch"
Stretch="None"
ManipulationMode="TranslateX, TranslateY"
ManipulationStarted="Image_ManipulationStarted"
ManipulationCompleted="Image_ManipulationCompleted"
ManipulationDelta="Image_ManipulationDelta"
Source="/Assets/image.png"
>
<Image.RenderTransform>
<TranslateTransform x:Name="Translation" />
</Image.RenderTransform>
</Image>
This is the code behind:
private void Image_ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e)
{
Translation.X += e.Delta.Translation.X;
Translation.Y += e.Delta.Translation.Y;
}
This application displays a rectangular 600x600 plain red image. I have resized the application so that the image is way bigger than the available client area. When the user slightly moves the image in the upper left direction, this is what the application looks like:
It seems, as I explained, that the entire viewport has been translated.
If I virtually add where the image should be to the screen shot above, this is what I would have expected:
In the screenshot above, one can see that the image is taller than the application so the entire height of the client area should be covered with a red portion of the image. Likewize, since the image has been moved to the left, only a narrow portion of the right screen should be white.
I hope these screenshots help give sense to my explanations.
Please, is it possible to obtain the desired behaviour when using the ManipulationModes?
Please, is it possible to obtain the desired behaviour when using the ManipulationModes?
I think the answer is no, it's not possible to do this in an UWP app, you will need to create a desktop app to obtain the desired behaviour.
In an UWP app, the Page is in a Frame, then the controls or shapes are in the Page, so basically the controls or shapes are all in a Frame container. What you want to do is actually getting the Rectangle out from its container, in this case we need another container for this Rectangle in an UWP app.
So what I could think about for this is creating a new window to hold this Rectangle. But problems will come with this new window, the app's title is along with a new window unless this window is in the full screen mode. Obviously a full screen mode window will not solve the problem.
This function can be done with Win32 APIs, you may refer to C# Drag-and-Drop: Show the dragged item while dragging, but this APIs are not supported in an UWP app. They are for desktop app only. For example, you may refer to CreateIconIndirect function. Besides, I can't find any supported APIs for UWP app which the same functions have.
Under the geoserver styling, how to set the LineSymbolizer tag to avoid line-overlapping. When I am zooming out, the geoserver is arbitrarily putting one line on top of another if they are too close to each other.
Additionally, the following XML code is allowing me to use "arrow" graphics for LineSymbolizer. But how to allow these arrows to bend at the corners?
<LineSymbolizer>
<Stroke>
<GraphicStroke>
<Graphic>
<Mark>
<WellKnownName>ttf://FreeSerif#0x279f</WellKnownName>
<Fill>
<CssParameter name="fill">#00B22D</CssParameter>
</Fill>
</Mark>
<Size>30</Size>
</Graphic>
</GraphicStroke>
</Stroke>
</LineSymbolizer>
We hide some line objects depending on the zoom level. For example, in small scale we show just big rivers. Try to use Zoom-based lines http://docs.geoserver.org/2.5.x/en/user/styling/sld-cookbook/lines.html#zoom-based-line .
For setting arrows' direction try to use attribute followLine http://docs.geoserver.org/stable/en/user/styling/sld-cookbook/lines.html#label-following-line .
I have a SVG logo rendered to the canvas using fabric.js, the original SVG is all black in color but I need the user to be able to change the color of each different parts of the logo, resulting in a object with multiple colors, e.g.:
wikimediauruguay.org/images/5/53/Wikimedia-logo.png
How can I achieve this? If I just use object.setFill() it changes the color of the entire object but I need to change the color of every part separately to whatever colors the user choose. Thanks.
EDIT: found the solution, just posted my answer below in case somebody else has the same question.
Perhaps someone who knows something about fabric.js would answer in a way that makes more sense for your case, but with plain old svg, an object is often a <g< element with things ( like <rect>, <path>, <ellipse>) inside. Each child of the group, can have its own event handler:
<g>
<path onclick='handle(evt)' attrs=stuff />
<rect onclick='handle(evt)' attrs=stuff />
<circle onclick='handle(evt)' attrs=stuff />
</g>
The function activated by the click can then interrogate evt.target to see which of the subelements received the click, sorta like this:
if (evt.target.nodeName=="path") {evt.target.setAttribute("fill","purple")}
Solved mi problem in a very simple way: I just needed to edit the SVG on Illustrator so that every different colored part of the logo will be on a different layer, then when I loaded the SVG via fabric.loadSVGFromURL() each layer will be treated as a different object by fabric.js, then I just could edit each object (layer) separately (setFill(), etc).
I've created a nice chart but there's one thing missing. I'd like to be able to set a text somewhere in it. The optimal solution would be e.g. the current date smacked in huge yellow letters right in the middle of my graph.
I've googled for such a thing but none of the links (proof that I've googled #1, proof that I've googled #2) gave any hints on whether it's possible or not. In fact, the mock-up image in the second link would be something for me if the descriptions and arrows weren't drawn afterwards in an image processor.
NB. It's not a report at all. It's just a chart - a single, lonely chart - that displays values of a couple of series. I get to control the appearance, the legend etc. However, I'd like to put a floating text object (DIV formatable by CSS would be perfect), sprite, overlay, call it whatever you'd like, that will get its value from a given field (e.g. the current date).
And if I can position it freely anywhere over the graph, that'd be even "perfecter" but I'd settle for placement on form "top-right" or such. Alternatively, if there's an option to combine two "views" on top of each other or anything like that (I'm beating around the bushes with this).
Is that achievable and if so how?
Right, I've had a play, a good dig around with the SDK, a bit of a google and this is the best I can come up with.
I know how to place text at arbitary positions on the chart, but only with static text, e.g. I don't know how to bind the text dynamically to anything - I suspect this is more to do with CRM than Charts, I couldnt find much documentation for CRM and Charts.
So I've found that TextAnnotation allow you to bascially place text wherever you like. This is contained within theAnnotations collections.
For example:
<Chart>
...
<Annotations>
<TextAnnotation Text="This is an annotation" Name="TextAnnotation1" X="20" Y="50">
</TextAnnotation>
</Annotations>
...
</Chart>
So important to note that the position of the TextAnnotation is relative, e.g. the annotation will appear 20% of the width of the chart from the left. 0,0 is the top left corner. The MSDN has some more detail on positioning.
So I can create a chart like this:
HELLO WORLD! is the annotation.
Using this xml:
<Chart Palette="None" PaletteCustomColors="55,118,193; 197,56,52; 149,189,66; 117,82,160; 49,171,204; 255,136,35; 97,142,206; 209,98,96; 168,203,104; 142,116,178; 93,186,215; 255,155,83">
<Series>
<Series ShadowOffset="0" IsValueShownAsLabel="True" Font="{0}, 9.5px" LabelForeColor="59, 59, 59" CustomProperties="PieLabelStyle=Inside, PieDrawingStyle=Default" ChartType="pie">
<SmartLabelStyle Enabled="True" />
</Series>
</Series>
<ChartAreas>
<ChartArea>
<Area3DStyle Enable3D="false" />
</ChartArea>
</ChartAreas>
<Legends>
<Legend Alignment="Center" LegendStyle="Table" Docking="right" IsEquallySpacedItems="True" Font="{0}, 11px" ShadowColor="0, 0, 0, 0" ForeColor="59, 59, 59" />
</Legends>
<Titles>
<Title Alignment="TopLeft" DockingOffset="-3" Font="{0}, 13px" ForeColor="0, 0, 0"></Title>
</Titles>
<Annotations>
<TextAnnotation Text="HELLO WORLD!" Font="Stencil, 15.75pt, style=Bold, Italic, GdiCharSet=0" Name="TextAnnotation1" X="20" Y="50" ForeColor="Orange">
</TextAnnotation>
</Annotations>
</Chart>
If that doesnt achieve your requirements I would suggest having a look at an SSRS report or some other custom piece IFramed into the dashboard.
You might want to check this link where they put descriptive text on a map. I haven't got that to work (didn't try very hard, either) but it's pretty easy to set just some text instead of a graph by the following code.
<visualization>
<primaryentitytypecode>blobb</primaryentitytypecode>
<name>My custom name</name>
<webresourcename>MyCustomHttpFile</webresourcename>
</visualization>
I would be nice indeed to surprise a customer with a flash text sometimes so the idea is worth exploring. Strangely, I haven't found any good guide on how to do that.