I've been working to animate some cards that toggle open and closed. The contents are dynamic, so I can't set a fixed height.
Ideally the height should start at zero, then we learn the intended full height of the item by using the setLayout method of the view.
Then a standard Animated.spring or Timing event can animate the height value.
Here's a snack:
https://snack.expo.io/#ahartzog/animated-dynamic-height
https://tutorialscapital.com/react-native-dynamically-expand-collapse-slidedown-slideup-view-using-layoutanimation-tutorial/
This tutorial explained it - have to use the LayoutAnimation API instead of directly trying to animate it myself.
Related
I am finding it difficult to set the right look and feel of a CN1 Slider control. Essentially i want it to look like the one in the CN1 Default Demo of the Theme window, and have it with the Thumb image to allow the user to set the scroll.
But when i code it up as per online examples, it comes out skinny on the simulator (as below)
...but doesn't display the line at all on the actual iphone device.
When i start messing with the methods, such as 'getSliderEmptyUnselectedStyle()' then this makes the background show and can see the progress but its tall and i cannot seem to shrink it.
Container container = new Container(new FlowLayout());
container.getAllStyles().setBgTransparency(255);
container.getAllStyles().setBgColor(0xffffff);
Slider slider = new Slider();
// slider.getAllStyles().setFgColor(0);
// slider.getAllStyles().setMarginLeft(0);
// slider.getSliderEmptyUnselectedStyle().setBgTransparency(255);
// slider.getSliderFullUnselectedStyle().setBgTransparency(255);
// slider.getSliderEmptySelectedStyle().setBgTransparency(255);
// slider.getSliderFullSelectedStyle().setBgTransparency(255);
// slider.getSliderEmptyUnselectedStyle().setBgColor(0xffffff);
// slider.getSliderFullUnselectedStyle().setBgColor(0x42B72A);
// slider.getSliderEmptySelectedStyle().setBgColor(0xffffff);
// slider.getSliderFullSelectedStyle().setBgColor(0x42B72A);
Style sliderStyle = UIManager.getInstance().getComponentStyle("Label");
sliderStyle.setFgColor(0);
slider.setThumbImage(
FontImage.createMaterial(FontImage.MATERIAL_RADIO_BUTTON_CHECKED, sliderStyle, 4).toImage());
slider.setMinValue(0);
slider.setIncrements(25);
slider.setProgress(entity.getCompletion_pct());
slider.setEditable(true);
container.add(slider);
return container;
How can i get it pretty much to the CN1 example?
Thanks
The slider in the example used a 9-piece border or a 3-piece border both of which have a fixed minimum height/width. This minimal height is applied to the way the slider is rendered.
Your code can be made thicker with padding but it will create a problem when you add a thumb. Once you add the thumb it will increase the overall size and make the entire height of the thumb have that background. So you need to style this via the designer and for this specific case you would want to use an image border that is carefully measured to align with the thumb image.
Also notice you used getAllStyles() which is wrong. Slider is a special case and uses the Slider and SliderFull UIID so effectively the component has two UIID's and two separate sets of Style objects.
I'm used to using Titanium.Platform.displayCaps.platformWidth all over my app to get the width of the window.
But with SplitView on the iPad Titanium.Platform.displayCaps.platformWidth still returns the total screen size of the iPad (as it probably should).
How can I determine the actual available screen width for the app while using SplitView?
I don't mean SplitWindow BTW. This is in regards to SplitView where you can line up two different apps next to each other on the iPad
Thank you!
you can get the width your uiElement using postLayout event
var uiWidth;
myElement.addEventListener('postlayout', postlayout);
function postlayout(e){
uiWidth = e.source.rect.height;
myElement.removeEventListener('postlayout', postlayout);
}
An easy way to determine how wide a certain view is, is to use toImage() on the UI element, and then get the size.
So... when you do
console.log($.myWindow.toImage().rect.width);
You should get the width of the window. Which should be the width allocated to your app.
I am attempting to implement something similar to Safari where the window's style mask is set to NSFullSizeContentViewWindowMask so the NSToolBar and title bar blur the background view.
This works fine, however I have a view that I need to not be clipped by the toolbar/titlebar, similar to how Safari's WebView has an initial top padding that doesn't cover the content when the view is unschooled.
My attempted solution was to create a dummy NSView which the unclipped views align their top value to, then changing the height constant of the dummy view to the height of the titlebar/toolbar. The issue, however, is that there seems to be no way to calculate the height of the toolbar.
This suggests that I calculate the height by subtracting the height of the contentView from the height of the window, but that only works (returns 0 otherwise as the two heights are equal) if I don't use NSFullSizeContentViewWindowMask which I want to use for the blurring effect.
Am I overlooking something simple, or is there no simple way to accomplish this?
Check NSWindow's contentLayoutRect property.
I have a uicollectionview cell with an image view inside that I want to resize when I switch to a larger 'zoomed in' layout.
I have placed constraints inside the cell that does resize the image view when the zoomed in layout is displayed. I am using uicollectionview setLayout animated method.
The problem is the image does not scale with animation only the collection view cell does.
The image seems to just jump into its end size with no interpolation. So the animation looks extremely choppy.
It seems as if I need to somehow control the auto layout constraints so they animate with the set layout animated method but I don't know how.
Is there a proper way to scale the cell and it's contents ?
Thanks so much!
I had (have) the same problem with Auto Layout!
Presently the simplest way I've found to deal with it is to set:
imageView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
This causes the imageView size transition to be animated smoothly and is the only thing that I've found to work consistently with setCollectionViewLayout:animated:
You may find this answer and the linked GitHub demo app I wrote to solve a similar issue helpful.
I have a window. That window has a header (variable size) and should have a scrollable body that sits directly under the header. How can I set the height of the body so that it actually scrolls? If I set height: 'auto', the body extends beyond the bottom of the viewport to fit all of its content. If I set its top and bottom properties, nothing shows up at all.
I can't imagine that I'm the only one who's come across this, but I haven't found a single definitive answer for how to create properly sized, scrollable view within a window. Heights seem tricky since the value is so different in portrait and landscape modes on a single device, much less across devices.
Can someone provide tips on how to manage this scenario? I'm hoping I can extrapolate it to handle other view height scenarios.
Thanks.
It depends on what you are trying to achieve. If you're trying to create a ScrollView that just has the ability to scroll when empty, you should add a empty View into the ScrollView, which has the "top" property.
For example:
var win = Ti.UI.createWindow();
var scrollView = Ti.UI.createScrollView();
var emptyView = Ti.UI.createView({top: 460});
scrollView.add(emptyView)
win.add(scrollView);
Note that the "top" property has 460 set, which is 40 bigger than the iPhone screen res of "420". This will case the scrollView to scroll. If you're looking for a specific size based on the window's navBar controlTitle, you will have to run an equation based on what you think the size will be, applying that size to the view's "top" property accordingly.