I am using a Vaadin 10 (Flow) Grid to stream data to new rows, and I am trying to add a custom image icon to my TemplateRenderer.
I have a TemplateRenderer setup like this:
TemplateRenderer<TradeUni> sizee = TemplateRenderer.<TradeUni>
of("<div class$=\"[[item.class]]\">[[item.size]]</div>")
.withProperty("class", cssClassProvider)
.withProperty("size", TradeUni::getSize);
Which displays my numbers correctly in the grid cell like this:
I would like to have my image rendered inside the same cell, to the left of the numbers.
This was my (very crude) attempt to import it using html:
TemplateRenderer<TradeUni> sizee = TemplateRenderer.<TradeUni>
of("<div class$=\"[[item.class]]\"><img src=\"i.imgur.com/3LQBglR.png\">[[item.size]]</div>")
.withProperty("class", cssClassProvider)
.withProperty("size", TradeUni::getSize);
Which give's me this:
I think that I might have to wrap the image and numbers into a HorizontalLayout with the image being a separate component - I think I could handle that, but I am unsure of how to do the actual rendering of the image. I can probably accomplish it simply with the internal Vaadin Icons set, but I need to use my own little images.. all icons that I am going to use will be at or less than 25 x 25px.
Thank you so much in advance!
I think you're on the right track, but there's one small detail that causes you trouble. The URL i.imgur.com/3LQBglR.png doesn't define a protocol, which means that the entire string will be treated as a path relative to the location of the hosting page. It will thus try to find a file in a directory named i.imgur.com on your own server.
To fix this, you need to also include the protocol in the image URL, i.e. https://i.imgur.com/3LQBglR.png.
I can also offer a small suggestion for how to make the code easier to read. HTML also supports using ' for enclosing attribute values. This is more convenient to use from Java string since you don't need to use \ to escape ' characters. Your template string could thus be "<div class$='[[item.class]]'><img src='https://i.imgur.com/3LQBglR.png'>[[item.size]]</div>".
Related
My program injects text and pictures into a Word template. This works great via content control data binding (thanks to docx4j and Content-Control-Toolkit).
My problem is, that images get resized after injection. What I actually want, is the behavoir that Jason decribed here: http://www.docx4java.org/forums/data-binding-java-f16/picture-content-control-size-t634.html
The current behaviour is to just let it be whatever its natural size is (at a given dpi), unless that is greater than page width, in which case it is scaled down.
According to that post, the behavoir of docx4j has been changed so that the pictures always fit the size of the content control with respect to the ratio.
Is it possible to get the "old" behavoir back? Do I have to do that on my own, or is the switch, that Jason wrote about, already implemented?
As the answer to How to force Docx4j to refresh a replaced image file states, the size of a picture is stored in the main document part. At the moment, I only use XPath to set content in the custom XML part. If there is any possibility to get what I need without touching the documents XML directly, I would really prefer that. A macro to set the size after opening the document in Word is no option for me.
The first thing to be aware of is that these days we prefer to have a picture in a rich text content control, as opposed to a picture content control.
This is because Word limits your ability to "float" a picture content control.
The handling for this is triggered by w:tag containing 'od:Handler=picture': datastorage/bind.xslt#L165
The basic behaviour is that if the w:sdtContent contains an existing w:drawing/wp:inline/a:graphic then reuse it, so any formatting thus configured is used.
But for a "legacy" picture content control which doesn't contain a:blip (when would this be?), xpathInjectImage is invoked with wp:extent passed in (see bind.xslt#L240).
At line 1143, if (cxl==0 || cyl==0) // Let BPAI work out size
So if you want the image at its natural size, you could try removing the when clause at bind.xslt#L212
By the way, we can also bind escaped XHTML. But there, we make an effort to fit any image not just to the page width, but if in a table cell, to that as well.
I want to edit the css of an embedded image dynamically and using push, the intention is to build a web browser game and I don't want a 'tool explosion', I'm using Hibernate+JPA, Vaadin, ivy and a tool for server-push.
I don't want to use GWT, partly because the only part of it that I want is the canvas drawing, which seems to be really overkill, GWT is massive and I don't want to learn it at this stage simply so I can draw 2D pictures and move them around smoothly.
Here's how I'm loading an image.
Embedded embedded_1;
....
embedded_1.setSource(new FileResource(
new File(VaadinService.getCurrent().getBaseDirectory().getAbsolutePath()
+"/WEB-INF/images/sun.gif")));
....
mainLayout = new AbsoluteLayout();
mainLayout.addComponent(embedded_1, "top:0.0px;left:0.0px:");
Inside Absolute layout there's a field I want to access.
LinkedHashMap<Component, ComponentPosition> componentToCoordinates ...
I looked at the other methods that get called when I do
mainLayout.addComponent(embedded_1, "top:0.0px;left:0.0px:");
and they don't do anything special, (ie access non-java files or use any dynamically generated code), there's a method that cleans up and validates the CSS, its wrapped into a ComponentPosition object and then it is put unceremoniously into the HashMap.
Why can't I access this HashMap and do edits on the values already mapped by a key without changing the key itself. I want to take an embedded object and change it's css position dynamically, to do that all I would need to do is execute code
componentToCoordinates.get(reference).setString("top:10.0px;left:0.0px;");
and I could generate the string dynamically etc.
Is there a 'proper' way of doing this or is it something I have to create my own solution for?
I found what I was looking for though it wasn't in the form I expected.
There's a method in the layout API called getPosition(Component c) that will return the css string.
You can then change the string and put it back into the Map using setPosition(Component c ComponentPosition cp)
I am trying to make an image Viewer like the one shown in the figure below:-
Before i can start i have following questions in mind :-
How would i check for the number of images in the target folder so that i can iterate and include all the images in my app.
Secondly,i am thiking to scale the images down to 75x75 .But what i can't think is that how will i slide the images as scrollbar is moved
To be specific,what is the appropriate container for those 75x75 images queue and how that queue is shifted to left or right?(I already know how to get current scrollbar value and add event listeners on it to respond)
To check the number of images in the target folder you can use the File class.
As for the container you might need to create the animation your self. There is no a container ready for doing so.
This site ( and book ) has some ideas about it. I don't know how out-dated it might be though
http://filthyrichclients.org/
Unless I am misunderstanding, making a scrolling list of images is quite simple.
First, create a JList with a datamodel that allows images.
A great example is shown here:
Java drag and drop images in a list
Second, add the JList to a JScrollPane.
The scaling aspect can be easily performed using Scalr:
http://www.thebuzzmedia.com/software/imgscalr-java-image-scaling-library/
I wonder if there is some library I have missed that allows me to distribute text among different text objects and have it reflow depending on size, newspaper style? it's something pretty easily done in web but I can't find anything like it on Java for Android.
I don't know of any Android Layouts that work that way. You could probably create one that mimics the way html and css work though.
another option is to make your content with the Web technologies that you are used to and just display it inside of a WebView in your application. That would likely be a lot easier than trying to create the Layout yourself.
I had two text fields of different size and different default justification plus offset from the screen border. I simply overlapped them in the same space. Depending on what needed to be displayed, I would null out one field and fill in the other. It kept me from creating 2 different layouts and having to get creative with the text formatting.
I'm viewing HTML in an SWT Browser widget. I am appending logging messages to the end of the content and would like to keep the bottom visible all the time. Currently, whenever I append text to the content, I first set the new text:
browser.setText(content);
And then I scroll down the Browser widget via JavaScript:
browser.execute("window.scrollTo(0,100000);");
The problem with this is that when I set the text, the widget switches to the top again before scrolling down, so when I append lots of messages quickly, the browser widget is showing the top part most of the time, occasionally flickering when switching to the bottom. This makes it impossible to follow what is being logged at the bottom.
I am aware that I could use a tree viewer and get all the convenience of the Eclipse platform, but there is a Swing version of the app too and both should use the same HTML with CSS presentation.
Ideally I'd like to avoid embedding a Swing component, but if there is one that would allow this, I'd be happy to hear about it. I have tried it with a JEditorPane inside a JScrollPane, appending to the content via the editor kit's read method:
editorPane.getEditorKit().read(/*...*/);
And then scrolling down like this:
editorPane.setCaretPosition(editorPane.getDocument().getLength());
This works very smoothly for the standalone Swing app, but embedded in Eclipse it flickers and does not keep up with fast updates of the HTML content.
Right now the only way I can make this work smoothly inside Eclipse is prepending to the Browser widget's content instead of appending, but I'd really prefer adding new messages at the bottom, not at the top.
Rewriting the whole HTML content every time seems unnecessarily busy-work, and there may not be a way to prevent some browsers from scrolling to the top each time you redraw the entire page. Especially if you allow the logs you show to get very long, this will get slower and slower as the log gets longer.
A better solution might be to use JavaScript to append to the page. You're already using
browser.execute()
How about something like this (assuming "itemID" is the ID of the DIV containing the content):
String newContent = newContent.replaceAll("\n", "<br>").replaceAll("'", "\\\\'");
browser.execute("document.getElementById(\"itemID\").innerHTML += '"
newContent + "'");
You have to do the replaceAll() and you may need a couple more transformations, depending on your log content. I've noticed that browser.execute() doesn't like it if the script contains newlines, for example, and single quotes in your string needed to be quoted as I show above.
I would have just added this as a comment, but it wouldn't let me (not enough reputation). You can ship XUL in a nonstandard location on the mac, by setting a system property.
System.setProperty("org.eclipse.swt.browser.XULRunnerPath", "/fubar/xul/Versions/1.9.0.7/");