Margin Animation? - windows-phone-7

If I want to create a animation which change a control margin, and I need to write C# code instead of use blend, how to do this?

why do you want to change the margin? what kind of animation are you focusing upon? However you may use DoubleAnimation and StoryBoard to create your animation. Please refer the link below for a start.
http://windowsphonegeek.com/articles/WP7-Animations-in-depthndash-Overview-and-Getting-Started

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How to do a scale open animation in Flutter?

I'm trying to do this animation in flutter :
https://material.io/guidelines/motion/choreography.html#choreography-creation
My problem is that I have absolutely no idea how to do that.
As far as I know, widgets in flutter don't know their position nor the position or other widgets at all.
And you can't access context.size inside the build method.
I tried to use Hero animation to do it. Or ScaleTransition. But it's definitely not working.
You can use showMenu to dynamically show a popup menu at a given location. Consider using PopupMenuButton, which is an IconButton that automatically shows a menu when it is tapped. There's an example in the Gallery. If showMenu doesn't do what you want, you can copy the code in popup_menu.dart and customize it to make your own version. It uses CustomSingleChildLayout and PopupRoute.
If you just want to absolutely position a Material or Card on top of other elements, you can give it some elevation and use a Positioned within a Stack. You can use an AnimatedSize to adjust the element's size with a Curve. This won't interact with the back button on Android automatically, so if you want that, you may have to use addLocalHistoryEntry or PopupRoute.
If I understand you correct - you want to show square widget, and animation is not suitable at most because widget doesn't know its size.
In this case you can try MediaQuery.of(context).size.width - it returns width of your screen, so you can use it for calculating widgets size

How to use UIVisualEffectView with Objective-C

I've been looking for documentation on how to use the UIVisualEffectView with Objective-C in iOS8.
I've seen some code examples but would appreciate the steps to use the actual view in the Object Library. This is what I tried, which had no effect:
Create a new storyboard scene
Add a UIVisualEffectView
Add a UIImageView
Add a picture to the UIImageView
I want to have a blurred picture as the background for my scenes. Can someone point me to a tutorial or provide instructions?
Thanks
I have implemented a demo which demonstrates using UIVisualEffectView with vibrancy and also with vibrancy & blur. It uses a little bit different way of implementing via storyboard so look at https://github.com/Vaberer/BlurTransition.

UI Like Youtube in Android (Tablet)

I've spent 2 hours looking for a solution. I need to make a design
like the Youtube UI (Tablet UI) where it shows a vertical scroll, but
in each row there are 4 videos (landscape view). I've tried to do
something similar, but i couldn't =(
Is there any place where i can get the source code of the youtube
application for Tablet? Or maybe some resource to solve this? :(
BTW, my try was designing UI with scrollView, LinearLayout and my_item.xml, i tried to inflate my_item.xml adding programmatically into the linearlayout (horizontal orientation), but it doesn't work in the way that i want. I need something like a linearlayout but with horizontal and vertical orientation at the same time (something like a div).
I was thinking to use a ListView and a custom adapter (with my_item.xml), but i'm not sure if this can be the best solution.
Thxs
You should create seperate resources for each layout.
For example if the user is in Portrait mode you would have the correct layout in.
layout-port: layout for portrait orientation
layout-land: layout for landscape orientation
Read more on providing alternative resources here
Also i would recommend to read more on Handling runtime changes
This will help you with recognizing when the user changes orientation. You could actually use this guide and when the user flips the devices orientation you could then change the layout. Keep in mind hard coding this can be dangerous though. I would recommend using the layout folders.
Good luck!
Finally i solve my problem.
It works with a linearLayout(vertical) and adding linearlayout(horizontal) for each row. And obviously managing my scrollview.
BTW, i still think android should have a layout like a "div".
Thxs all

Set background to an listview

I want to set an background to my listview that have different size (depending the appearance of softkeyboard). My list view is in between the editboxes and I want my editboxes always to be visible (means I do not want to use adjustPan).
My problem comes in the moment when the android adjust the size of my listview and the background get tweaked. I want my background to remain the same, just to be cropped.
and I want to look something like this
Is there any style that I can add that will make the image act like this, the point is to do NOT do an resize and to fill the whole available area. And to DO something like a CROP , means to show as much as there is an space and then the rest just to be cropped.
I found some workaround for the problem I want to solve. I set the scaleType with "centerCrop" value and it seems to work fine.
I hope this will save time to someone else having this problem...
Try in your Manifest to add
android:windowSoftInputMode="adjustPan" or "adjustUnspecified"
for your <activity
Read more about values here:
http://developer.android.com/guide/topics/manifest/activity-element.html#wsoft
I would put the listview in a linearlayout and put the background on the linearlayout.
As for the textbox at the top, if you have not figured that out, use relativelayout.
Here is a good link about the view being re-sized by the keyboard:
http://groups.google.com/group/android-developers/browse_thread/thread/be5ffe40c2bc29f0?pli=1
Here is a good link for the button staying on top:
Add Image at above of listview

Best way to animate a circle moving around a screen in Qt?

If I wanted to, using Qt, simply have some circles move around in a white box, or a graphic, what would be the best method of this?
Would I need to draw white/the graphic behind where the circle moved from every time? Is there a simple way of accomplishing this in Qt?
Create QGraphicsView object to your widget and added a QGraphicsScene to view.
Add a QGraphicsEllipseItem to scene
Use QPropertyAnimation to change the "pos" property of the ellipse item.
If you need more advanced features, you can build your own animation class on QPropertyAnimation.
enjoy it:)
Update: You can read Qt's Next Generation UI for more information.
Subclass a QWidget. Start a timerEvent() to animate the positions of the circles, then call update() at the end to schedule a repaint of the widget. Override the widget's paintEvent() - in there you draw your background and circles, using a QPainter object. The Qt Assistant has examples of how to use QPainter.
Qt also has a new animation framework that may facilitate something like this, but I have not looked into it.

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