I'm filling a grid with views.
This takes some time.
During the filling, the background stays black.
When views are added, the black background goes aways accordingly.
However, I would like the grid's backgroundcolor to be White instead of Black.
No matter what I do, I just don't seem to be able to set the backgroundcolor.
I've set the NavigationPage's backgroundcolor to Color.White, and I've set the Grid's backgroundcolor to Color.White.
What else could I do to make the backgroundcolor white?
I'm not sure if the mistake is really on my side.
Here you can see what's happening:
First the grid's background is black. When views are added, the black background is overdrawn by the views.
On the right side you can see that 5 views have already loaded.
The 6nd view has not yet loaded, so the background is still black.
[![enter image description here][1]][1]
Edit:
In the NavigationPage / ContentPage I have this:
public MainPage()
{
this.BackgroundColor = Color.White;
In this MainPage, I have a Grid ("_BigGridAsLayout") in which a custom bottom navbar is placed. This "_BigGridAsLayout" occupies the entire page:
_BigGridAsLayout = new Grid()
{
BackgroundColor = Color.White,
}
(...)
_BigGridAsLayout.Children.Add(_CellGrid,0,0);
_BigGridAsLayout.Children.Add(_NavBar,0,1);
this.Content = _BigGridAsLayout;
Then I add "clsGridCell" views to the "_CellGrid".
"clsGridCell" looks like this:
public clsGridCell(eImageAlignment uImageAlignment)
{
this.BackgroundColor = Color.White;
BackgroundColor = Color.White;
Add the background color of the view (added in the grid ) to whatever color you want .
Related
When using RadListView with loadOnDemandMode="auto", how do I change the background color of the activity indicator in iOS?
In Android platform it seems to be the same as the background color, but in iOS it's white
collectionView.visibleCells returns ExtendedLoadOnDemandCell as its first element which contains the activityindicator used in loadOnDemand mode.
Below is the code to set the activity indicator's color and backgroundColor to transparent
this.listview.nativeView.collectionView.visibleCells[0].activityIndicator.color = UIColor.clearColor;
this.listview.nativeView.collectionView.visibleCells[0].activityIndicator.backgroundColor = UIColor.clearColor;
Set this on the tkListLoadOnDemandTemplate's loaded event. You might also have to wrap it in a setTimeout incase it fires too early.
<GridLayout *tkListLoadOnDemandTemplate (loaded)="onLoadOnDemandLoaded($event)"></GridLayout>
onLoadOnDemandLoaded(args) {
setTimeout(() => {
this.listview.nativeView.collectionView.visibleCells[0].activityIndicator.color = UIColor.clearColor;
this.listview.nativeView.collectionView.visibleCells[0].activityIndicator.backgroundColor = UIColor.clearColor;
});
}
I want my TabView bar to be the same color as my layout. There was a flat boolean added to NS to make this possible with the ActionBar, but how can I achieve this with my tab bar as well? If I set the tab-background-color property to black, I want it to actually be black, not dark grey due to the translucent property explained here: https://developer.apple.com/documentation/uikit/uitabbar/1623458-translucent?language=objc
I've found many posts/articles about solving this for the ActionBar but haven't seen anything about tabs yet
Try this on loaded event of TabView
onTabViewLoaded(args) {
const tabView = args.object;
if (tabView.ios) {
tabView.ios.tabBar.translucent = true; // false;
}
}
I have a page created using Xamarin Forms. I want to add a toolbar at the bottom of the screen like an overlay but doesnt change the actual layout of the screen. It should just overlay above everything and always be at the bottom.
It should showup only when there is a particular event. SO it will be added dynamically.
Any ideas - or if you can send point me in the right direction. I do not want to use any nuget packages.
Have you tried to use AbsoluteLayout/Grid?
<Grid>
<StackLayout><Label Text="Your content"/></StackLayout>
<Button x:Name="toolbar" VerticalOptions="End" Text="Your toolbar" />
</Grid>
Show/hide the control based on your event.
If you could show the code of displayToolbar it would be easier to write a code that suits your needs, but it should be pretty easy even without the code :)
You could do this with a RelativeLayout, AbsoluteLayout or a Grid but I recommend doing it with a Grid because is much lighter than RelativeLayout and has a lot more functions than AbsoluteLayout.
So, make the root of every page that you want to use displayToolbar a Grid with one row and one column. Add the actual content of the page to that Grid as a child view.
Now comes the part that would be easier with your code. When you want to display the toolbar, add the toolbar view as a child of the root Grid with VerticalOptions set to LayoutOptions.End.
That's it. The toolbar will be added in front of every view of the page and if you want to dynamically remove the toolbar, remove the root Grid's last child.
The layout would be something like this:
Grid root;
internal SomePageConstructor()
{
root = new Grid
{
ColumnDefinitions =
{
new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) }
},
RowDefinitions =
{
new RowDefinition { Height = new GridLength(1, GridUnitType.Star) }
}
};
root.Children.Add(actualPageContent, 0, 0);
Content = root;
}
void DisplayToolbar()
{
var toolbar = new StackLayout { VerticalOptions = LayoutOptions.End };
root.Children.Add(toolbar, 0, 0);
}
void RemoveToolbar()
{
root.Children.Remove(root.Children[1]);
}
Note: I did this directly on StackOverflow, code could need some corrections.
From this sample, you could do an animation of the toolbar coming from below the page or something like it. Just change the DisplayToolbar and the RemoveToolvar methods.
Obs. Method names on C# are PascalCased (every word is capitalized) so your displayToolbar is DisplayToolbar.
Hope it helps! :)
I'm writing a Forms app. How to position a view right at the bottom of the screen and when some entry is focused and the keyboard is visible, the view to be right above the keyboard? On android, it is possible to set Window.SetSoftInputMode(SoftInput.AdjustResize) and that will make the Content resize every time the keyboard is appearing/disappearing. However, I need the status bar to be transparent and SoftInput.AdjustResize doesn't work with WindowManagerFlags.TranslucentStatus. My question is, how do I position a view right above the keyboard without setting SoftInput.AdjustResize?
Take this example:
public Page1()
{
InitializeComponent();
var al = new StackLayout
{
HorizontalOptions = LayoutOptions.FillAndExpand,
VerticalOptions = LayoutOptions.FillAndExpand
};
var button = new BoxView {Color = Color.Red, VerticalOptions = LayoutOptions.EndAndExpand};
var entry = new Entry {HorizontalOptions = LayoutOptions.Fill};
al.Children.Add(entry);
al.Children.Add(button);
Content = al;
Content.SizeChanged += (sender, args) =>
{
button.Layout(new Rectangle(0, Content.Height - 120, App.Dimensions.Width, 120));
};
}
If you run this code, when you'll press the input, nothing will change, the "button" will remain on the bottom of the screen not visible because of the overlaying keyboard.
If we add Window.SetSoftInputMode(SoftInput.AdjustResize) in MainActivity's onCreate it works fine, the box is moved above the keyboard on entry's focus.
Also, if we change Content = al; to Content = new ScrollView {Content = al};, it works fine.
However, if we add Window.AddFlags(WindowManagerFlags.TranslucentStatus); in MainActivity's onCreate, none of those methods work anymore.
Thanks in advance.
I'm writing a Forms app. How to position a view right at the bottom of
the screen and when some entry is focused and the keyboard is visible,
the view to be right above the keyboard?
If you are using Xamarin Forms, then wrapping your UI elements in a ScrollView should do the trick. Something like this if you are using XAML:
<ScrollView>
<ScrollView.Content>
// Your Original XAML content here
</ScrollView.Content>
<ScrollView
EDIT:
Looking at the example you just added, I THINK I know what is happening. So, the ScrollView Trick only works for elements that require keyboard input. I.e if you instead had an entry element at the bottom of the screen, and wrapped everything in a ScrollView like I suggested, then the keyboard should push the entry element up for you. However in your case you have a boxview at the bottom of the screen, which the keyboard simply runs over.
What you have for Content.SizedChanged is a good idea, however I don't think the size of the view actually changes when the keyboard pops up (at least, Content.SizeChanged isn't called when the keyboard pops up), so that part of your code is really only called on loading of the page from the MCVE you provided.
HOWEVER, I was able to move the 'button' up when the keyboard appears by doing this:
Replace
Content.SizeChanged += (sender, args) =>
{
button.Layout(new Rectangle(0, Content.Height - 120, App.Dimensions.Width, 120));
};
With
entry.Focused += (sender, e) =>
{
button.TranslationY -= 120;
};
You may have a heck of a time getting that magic translation number for all the different devices and orientations though. When I tested it on the iPhone 6 simulator I had to push way above 120 before I could see it above the keyboard.
Hope that helps!
I am new to appcelerator titanium and have a question
how can I create a modal window that blurs its parent, or have a semi transparent background?, I managed to create a modal window but the parent went black.
thanks in advance
This is the current way to accomplish this in Titanium as of 3.1.3 on iOS.
First, make a new window.
var myModal = Ti.UI.createWindow({
title : 'My Modal',
backgroundColor : 'transparent'
});
Then create a wrapper view, a background view, and a container view:
var wrapperView = Ti.UI.createView(); // Full screen
var backgroundView = Ti.UI.createView({ // Also full screen
backgroundColor : '#000',
opacity : 0.5
});
var containerView = Ti.UI.createView({ // Set height appropriately
height : 300,
backgroundColor : '#FFF'
});
var someLabel = Ti.UI.createLabel({
title : 'Here is your modal',
top : 40
});
var closeButton = Ti.UI.createButton({
title : 'Close',
bottom : 40
});
closeButton.addEventListener('click', function () {
myModal.close();
});
Now build your UI stack. The order is important to avoid having to set z-index.
containerView.add(someLabel);
containerView.add(closeButton);
wrapperView.add(backgroundView);
wrapperView.add(containerView);
myModal.add(wrapperView);
Now you can open your modal, but to NOT set modal : true
myModal.open({
animate : true
});
Its very simple.Just create the window, and when you're opening it,specify the 'modal' property as true!
var ModalWindow = Ti.UI.createWindow({});
ModalWindow.open({modal:true});
In Titanium Appcelerator (tried in 1.6.2) a modal window is always a full screen window. The parent might seem black because this modal window's background is black.
Try specifying a semi-transparent image as the background of this modal window, you are creating and you might get the effect you want from it.
You could try using the opacity on the window you have that is overlaying the other.
Ti.UI.currentWindow.opacity = 0.4;
If you are on iPhone, probably you cannot make it. on iPhone, if a modal dialog appears, the other window on the render stack will be cleared. That is, only ONE modal dialog in the render stack. That's the reason you got black if other areas of the parent are not covered by your modal window. iPad implemented modal dialog using "sheet" style, so you can make the are areas semi transparent.
I like the solution presented by AlienWebguy, although I think there's a minor bug. When you create your label, I think you meant to set the text property and not the title property:
var someLabel = Ti.UI.createLabel({
text: 'Here is your modal',
/* etc., etc. */
});
When I used title, it (the label) was not appearing in the window.
Another modification I might make is to set the layout property for the container view, e.g.,
var containerView = Ti.UI.createView({
height: 100, /* or whatever is appropriate */
backgroundColor : '#FFF',
layout: 'vertical'
});
In doing this, you can "stack" up the GUI elements in that view and not worry (too much) about setting layout coordinates... At least that's what I do in creating a customized alert box using the techniques outlined here.
i was also looking for such window with semi transparent background for ios 8.4. I tried the way "AlienWebguy" in Alloy XMl but the issue was whole window getting opacity 0.5 and background stacked window content are clearly visible than foreground view content. i have did some changes to the "AlienWebguy" to get the required result:
<Alloy>
<Window backgroundColor="transparent" modal="false">
<View layout="vertical" width="Ti.UI.FILL" height="Ti.UI.FILL" backgroundColor="#000" opacity="0.5">
// View will fill whole window with transparent shade of black color.
</View>
<View class="container" zIndex="100" height="400" width="Ti.UI.FILL" backgroundColor="#fff">
// You can add any content here, which will be look like Modal window.
//View automatically vertically centered on screen.
</View>
</Window>
</Alloy>
Hope this will save the time of developer doing in Alloy. Thanks for "AlienWebguy" for the concept.
why not just give it transparent background?
<Window backgroundColor="#80000000">
<View class="container">
// Your views
</View>
</Window>