Im working ok a LUDO app as my xamarin practice. I have a LUDO board designed with grid views and each cell is a stack layout with row and a column. I want to move my coins from one cell to amother when the dice is thrown. As per the number comes on dice. For now Im just adding the coin as a child to the stack layout, but I want to move it from one cell to another. For that I'm thinking of translateto animation, but how to use translateto animation in a grid cells. Or is there any other way to achieve it.
Thanks
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In a WP8 app, I have a ListBox bound to an ItemsSource with a Grid as it's ItemsPanelTemplate. The layout of the Grid might be different each time (different number of rows/columns) based on user selection and I'm using a helper class in order to bind the ItemsPanelTemplate Grid's Row and Column Definitions to values read from a database.
The user can add item's to the app and assign each item to a Grid cell in the ListBox. Each item can "sit" in multiple Grids (a many-to-many relationship), which led me to use another binding helper class in order to set the bindings of Grid.Row and Grid.Column attached properties in the ListBox.ItemContainerStyle, bound to a property of the ItemsSource class.
Another requirement is to have the app in Portrait orientation when Rows.Count >= Columns.Count and in Landscape when the columns are more.
I'm also using the Toolkit Gestures for drag and drop operations.
The issue in question, is a drag issue on Landscape orientation. While everything works great on Portrait, while on Landscape orientation the ListBox goes crazy. The dragging happens to different cell's that those actually being dragged and some of them don't even raise the gesture events (DragStarted, DragDelta, DragCompleted).
I'm lost here, don't know what the issue might be, or how to solve this.
Need your lights please.
Here is a sample that illustrates the problem.
EDIT
Phew, it's a bug of the GestureListener on the toolkit. It does not respect the Landscape orientation and treats the UIElements as if they were rendered in Portrait.
Using the Manipulation Events instead, which work properly. Can I have my 50 bounty points back? :P
If it is not gesture listener but Manipulation Event you are looking at there is couple of good questions out there:
Drag and drop from list to canvas on windows phone with MVVM
Moving Object in ScrollViewer
Is it possible to apply UI virtualization to ScrollViewer in WinRT. In my application I am creating a line chart with the help of Polyline(Polyline embedded inside a scrollviewver). But in the current case, If it come more than 500 points. It blocks the UI during the time of interacting with the Map. So what I am trying to achieve is to apply kind of UI virtualization to scroll view. If anyone had any idea to solve this please help me.
The way I would handle a Polyline is I would break its data into sections, perhaps screen-wide ones (assuming horizontal-only scrolling), put a Canvas inside of the ScrollViewer, make the size (Width) of the Canvas the total size of the chart and put a few (say 5) Polyline controls in it and then on the ViewChanged event update the Polyline controls' Canvas.Left and Points properties to correspond to the area around the current view port of the ScrollViewer. That should give you smooth scrolling. Just don't add/remove or update the controls on each ViewChanged and only update Canvas.Left and Points when you need to - that is when you don't have a Polyline ready to display next to the current view port.
How would I go about setting a custom background image for a UITableView. The wrench in the works is that the table is a grouped style (rounded top corners for the first cell and rounded bottom corners for the last cell). I would like do this as much in code as possible without relying on images too much.
Ideally, here is the solution, but I have no idea if this will work or not:
Create one custom background image
Apply the same custom background image to every cell
Rounding occurs automatically because it is a Grouped table style
Profit.
Is this how it works (besides the profit part... I am an app developer, after all)? Do I need to re-think my approach or is this possible? How would do what I described (or another approach) in code specific to iOS 5+?
Update
Just to clarify a bit, the main question I'm asking is: Does the rounding still occur on the top and bottom cells even if you are using a rectangular image?
Well I think what you are saying is ok, but I suggest creating a unique cell layout in a .nib file and apply there the background. Then, with initWithNibName you can manage every cell at the UITableView's methods on the ViewController.
I'm trying to make an animation effect similar to the one on Safari(iPhone) when you add an element to the reading list. It's similar to the one that appears when starting to download an item from App Store application: the application item drops to the dock to start downloading.
First it bounces up and then goes to the dock. It's a very nice effect that Apple uses on their OS.
I have an image view on screen that I want to drop with this kind of animation to my toolbar in my application.
If there is someone who did it or know what's the name of the effect, could please tell me how to do it.
Thank you.
"Add to reading list" shows no animation on my phone but of your description it sounds like the "Open in background"-animation in Safari (iPhone). My answer describes that animation.
I wrote a thing like that a few months ago and much of it is doable while some of it is not. Your questions showed me that more people are to know how it is done so I wrote a blog post about it. I will describe the high level approach and challenges here but you can read more about it in that post.
Getting to content to animate
If you choose to animate the view that is on screen down to the (in your case) tool bar then you will only have to access its layer. If you want the original view to remain and animate a visual copy (like the "open in background"-Safari animation) down to the bar item then you should create a new layer and draw the content of your layer into an image and set that image as the content of the layer that you are animating
Calculating the end position
The start position of the animation is simply the frame of the view. The end position is very tricky since bar items (both tool bar items and tab bar items) are not UIView subclasses and doesn't have a public view property. This causes problems when you want to shake the bar item later on.
I decided to make a visual approximation of the end position using some simple heuristics. If you know before hand that you will only animate to a single bar item then the end position can be hard coded to a suitable frame.
Animating along a path
There is nothing special to moving, scaling and rotating the layer from the start to the end position. If you want to read more about how I did it you can look at the post I wrote.
Shaking the bar item
This cannot be done without a lot of custom code or using private API at the moment. Since bar items doesn't have a view or a layer there is no accessible layer for you to animate. I guess that you could have a custom animating image that does the shake and set that during the animation and set the new image afterwards. The approach of drawing into an image and animating that doesn't work that well either since there is no accessible layer who can draw its content into the image (you want this for the special effect of the tool bar item and tab bar item).
...put all this together and tweak it to your special needs and you will have an animation that resembles the animation you are looking for.
I am setting up a 3 x 3 grid on a wp7 using <grid> and <row/columnDefinitions> for size. When someone taps on a cell, I want the cell to take up the entire 3 x 3 space (so now the grid is 1 x 1). Also when this happens, I need to animate this as a slow zoom up or something similar.
Any ideas where i should I start?
I don't have an exact answer but can note down my initial thoughts that could help you.
It appears the Height and Width properties of RowDefinition and ColumnDefinition are Dependency properties which means you can animate them with a storyboard. You could either create nine storyboards (one for each grid) or one storyboard that you modify in code for the animation required.
Another approach could be using the Visual State Manager, with separate states for each cell you could achieve the effects you're after by altering the row and column definitions. Bit tedious as well since you'll need ten states.