WinJS ListView auto sizing - windows-8

I want to display a ListView in WinJS which never shows it's own scroll bar. I want it instead to grow horizontally into its parent container. The way in which I've implement it is basically by setting the min-width css property on the ListView. On initial load, this works flawlessly. When additional data is loaded into the backing data source (a WinJS.Binding.List in this case), I expect the ListView to draw the elements and resize itself. Instead, the ListView draws the elements and adds its own scroll horizontal bar. After about a second or two, suddenly the ListView is resized automatically and fits into the parent container.
How can I have this resize happen immediately after elements have been added? Force layout won't work because it redraws every single item and I am populating a lot of elements into this ListView.

I agree with Dominic, that you should try to listen to the loadingStateChanged event on the listview control. There is a chance that it won't fire immediately, in which case i would show the progress element over your list and wait for it to redraw, then remove the progress.

I used a technique I found on how to detect overflow on a div. Basically, after I add all the new data items, I ensure that increase the size of the ListView's parent div until the ListView div doesn't have overflow anymore.
Edit: so in the end I decided against this strategy because of the advice as a result of this post. I looked at the built in Grid project template and figured out how to ensure that the list view fits in the whole screen properly. I used the following CSS.
#listid{
height: 100%;
position: relative;
width: 100%;
z-index: 0;
}
#section[role=main]{
margin-left: 0;
}
#listid .win-horizontal.win-viewport .win-surface {
margin-left: 120px;
margin-right: 115px;
}

Related

Sticky tab bar with Fluent UI's Pivot

I am building a tabbed environment using Fluent UI's Pivot component. Some of the tabs (or PivotItems in Fluent UI parlance) are quite long and need to be scrollable. Is there a way of having the tab bar be sticky such that it stays on top of the frame and visible no matter where the user scrolls to on the tab?
To get expected behavior you just need some CSS.
Set height of body and html to 100vh, and overflow: hidden to avoid multiple scrollbars.
body, html {
height: 100vh; /* Viewport height */
overflow: hidden; /* To avoid multiple scrollbars */
}
As a working example I'm gonna use Links of large tab style. Content of every item renders inside PivotItem Component. So, you have to put some styles on it:
const pivotItemStyles = {
height: 'calc(100vh - 44px)',
overflow: 'auto',
}
PivotTabs by default uses height: 44px that's the reason why I put calculate inside height property. overflow: auto is to get scrollable content.
Reference: Pivot.styles.ts
Codepen working solution

How to make items responsive in vb.net?

I Want to make my form items responsive when re-size application window like the websites but i can't do it.
I want to make it always in the center of the application window i was used "anchor" property but it doesn't do it.
there is any way to do this ??
You can centre a control on the form by using CSS. For example:
div.deskTop
{
width: 60%;
margin: 0 auto;
}
Then use the HTML:
<div class="deskTop">
... Define controls to be centred ...
</div>
The DIV containing the control will always be 60% the width of the current form size, and will be automatically centred when the form resizes.

Safari a:hover changing sibling in fixed element

I am making a simple fixed SoMe sharing button set for a blog. Everything is fine and dandy except in Safari. Hovering over one of the buttons changes the background-color of the siblings to a color I do not specify anywhere in my CSS. This behavior goes away as soon as I change the wrapper from fixed to relative/static/absolute.
Has anyone ever run into this?
Am I doing something wrong?
If not, is there a hack/fix/workaround?
HTML:
<div id="share-links">
<a class="share-twitter" href="#">a</a>
<a class="share-facebook"href="#">a</a>
<a class="share-linkedin" href="#">a</a>
</div>
CSS:
#share-links{
left:0;
top:5em;
position:fixed;
}
#share-links a{
display:block;
height:2em;
width:2em;
color:white;
background-color:#a16159;
}
#share-links a:hover{
background-color:#8a392e;
}
Fiddle: https://jsfiddle.net/u6vzq192/26/
I discovered this problem in a slightly different situation. I have pagination dots in a fixed div using links like you have set up. I am adding a class to the links with Javascript which in turn changes the background color. Every time this happens the background colors of all the other links go crazy. I believe that it is a rendering bug in Safari inverting the background of the links when one changes.
After much experimentation with your example I discovered that it stops if either the links themselves are much larger or the container is much larger. Since setting the links to be giant buttons affects design, it seems the best solution is to set the container to be larger. Since your example is a vertical set of links you would set the height of the container to be something much larger than the links. I used height: 100%; but a large px should work too. If you had links laid out horizontally you might need to make that width: 100%; instead.
CSS:
#share-links{
left:0;
top:5em;
position:fixed;
height: 100%;
}
#share-links a{
display:block;
height:2em;
width:2em;
color:white;
background-color:#a16159;
}
#share-links a:hover{
background-color:#8a392e;
}
I encountered a similar problem. As well as being fixed, one of the inside elements had transform:rotate 90 deg and had a hover effect that changed its position slightly (pulled out from the side of the screen). The background color of this element and its sibling were the same, and both would flicker randomly when elements on the page were changed / rendered.
I finally found a combination of styles that stopped the background colour flickering altogether.
I added the following to the parent element from here: https://stackoverflow.com/a/27863860/6260201
-webkit-transform:translate3d(0,0,0);
-webkit-transform-style: preserve-3d;
That stopped the flickering of the transformed/sliding element.
And I added the following to the remaining element from here: https://stackoverflow.com/a/19817217/6260201
-webkit-backface-visibility: hidden;
This then stopped the flickering of the background colour for the sibling element.

How do I change listview item size programmatically of winjs listview?

I have template binded with the listview in windows store application which I am developing using html5 and javascript. I have a requirement to change the size of the listview item programmatically. Basically I have a input type range on my page. User will change the value of the input and according to that value I should be able to change the size of the listview item programmatically.
Any help or pointer will be much appreciated.
Thanks in advance!
I know this is old, but I have just spent hours doing extensive tests (because I didn't feel like switching to grid mode) and I found a very simple way that would allow you to have items of any height without them overlapping,I though I would share it, all you need to do is add this to your css:
.win-listview .win-listlayout .win-container {
height:auto;
}
You can set the size of the items in a listview using the class set on the item in the template. You can:
Define different classes for the different sizes you want
Define the sizes in CSS. Example:
.small {
height: 150px;
width: 150px;
}
.large {
height: 300px;
width: 300px;
}
Set the appropriate class on the template item:
var templateItem = document.querySelector("#regularListIconTextTemplate .regularListIconTextItem");
WinJS.Utilities.addClass(templateItem, "large");
Refresh the listview:
element.querySelector("#listView").winControl.forceLayout();

Hiding content outside of background and show when scrolling

Working URL:
http://webstage.co/scroll/stack.html
What I am trying to accomplish is to hide the content when it is outside of the background area (1280x800). I like the way the backgrounds are coming in when you scroll to a new section, but I want to hide the content until it gets into that 1280x800 viewport? Any suggestions on how I can accomplish this?
Bonus...It would be great if I could also hide the content under the top navigation once it scrolled up under it as well. A guy can dream. :)
Thanks!
For the first part you can add another div and target with css something like this:
.viewport {
width: 1280px;
height: 100%;
position: fixed;
top: 0;
left: 50%;
margin-left: -640px;
background: black;
clip: rect(800px, 1280px, auto, auto);
}
Basically, set the background to the same color as the page background and use clip to only display the portion of the div that sits below your desired viewport area hiding the content outside the viewport area.
If you add content to the footer later you may need to tweak some z-index settings to make sure it sits on top of the viewport div.