On a Xamarin.Forms label, I see a MinimumWidthRequest, but is there any way to set the maximum width allowed?
I have a StackLayout with horizontal orientation, and would like labels in the layout to have a maximum width of 500px before being truncated. I don't want to just set the WidthRequest to 500px, because shorter labels should be sized to fit without extra space at the end.
Try setting the label's LineBreakMode to TailTruncation
If you do not set the WidthRequest, it will automatically truncate when the label reaches the end of the container. This will allow your shorter labels to remain smaller, as you requested.
XAML
<Label
Text="This is a very long text"
LineBreakMode="TailTruncation">
</Label>
C#
label.LineBreakMode = LineBreakMode.TailTruncation;
============
DOCS: https://developer.xamarin.com/api/type/Xamarin.Forms.LineBreakMode/
EXAMPLE: https://forums.xamarin.com/discussion/20509/truncate-long-texts-with-ellipsis-on-label-control
Related
I have a grid with multiple buttons as children. Now I want to give this Grid rows a background color. So I added a border with a background color like this
Border brd = new Border
{
Margin = new Thickness(0, 2, 0, 2),
Background = (SolidColorBrush) Application.Current.Resources["RedBrush"],
CornerRadius = new CornerRadius(22),
};
Grid.SetColumn(brd,startColumn);
Grid.SetColumnSpan(brd, 9- startColumn);
Grid.SetRow(brd, startRow);
GridMain.Children.Add(brd);
All looks good to me, But when this is rendered all buttons are hidden as the Background color of Border only is visible in the row. How can I overcome this?
Instead of adding the Border from code behind, If I added in Xaml all works fine (border background is visible as button background and button text is visible)
<Border Grid.Row="5" Grid.Column="1" Grid.ColumnSpan="8" Background="{StaticResource RedBrush}" CornerRadius="22" Margin="0 2 0 2" />
But for various reasons I wan the ability to add this border from code behind itself.
If you want to set the background color for Grid, you can directly use Grid.Background to set, without adding a new Border.
But if you need to add a Border as a background, please pay attention to the calling sequence in the code.
Generally speaking, the element added later will be placed on the top layer of the previous element, forming a visual effect of covering.
From your problem description. You can put the code that adds Border first.
Thanks.
I want to create a Ti.UI.TextArea object which would dynamically adjust its height to content but would have default height set (if no content). In Appcelerator if you don't specify height then it will automatically adjust its size to content but if there is no text then its size will be similar to textField. This is to small for me.
If you specify height property, then TextArea height won't change even if text will be longer than editable region.
I would like to have something like this:
var textArea = Ti.UI.createTextArea({
minHeight: 30,
});
or like this:
var textArea = Ti.UI.createTextArea({
minLines: 3,
});
I am looking for solution both for Android and iOS.
Is there any workaround for that?
You can change the height of the textField dynamically.
Add onChange event handler and change the height of the textField dynamically according to the number of lines in the text field.
Starting with 7.5.0.GA you can use maxLines on Android to be able to extend the TextArea to when pressing return. For iOS you have to create a work-around since there is no parity at the moment.
Below is the markup i am using to render an EXT.NET container containing a collapsible panel(west) and another panel containing my content (center).
how do i make it resizable when i resize my browser?
currently its not resizing as i specified width and height and if i do not specify Width and Height, it does not show me anything, it shows blank.
#Html.X().Container().Layout(LayoutType.Border).Width(500).Height(300).Items(
Html.X().Panel()
.ID("Panel1")
.Region(Region.West)
.AutoDoLayout(true)
.Collapsible(true).Border(true).Title("West Panel").Items(
Html.X().Label().Text("Item 1"),
Html.X().Label().Text("Item 2")
),
Html.X().Panel().ID("Panel2").Region(Region.Center).Title("Center")
)
EDIT : I Cannot use ViewPort as its distracting my layout
I am not ure container support this but viewport.
Use instead of the container an viewport
#Html.X().Viewport().Layout(LayoutType.Border).Items(
Html.X().Panel()
.ID("Panel1")
.Region(Region.West)
.AutoDoLayout(true)
.Collapsible(true).Border(true).Title("West Panel").Items(
Html.X().Label().Text("Item 1"),
Html.X().Label().Text("Item 2")
),
Html.X().Panel().ID("Panel2").Region(Region.Center).Title("Center")
)
another solution I can imagine ,to get the resize event and set the width and height of container with the appropriate values
I have an image area in my application with width:530px and height:510px. I want to place images in that area but the images comes in different different sizes. how to crop or scale the image without losing aspect ratio to fill that area. Is there any native methods available in winjs?
You have a few options for that.
One is to use the ViewBox control that WinJS provides you. The ViewBox can only have a single child (so you would have your tag as its only child perhaps or a div that contains your img) and it will scale that child (using CSS transforms) up to fit into its container (without changing the aspect ratio). It's pretty slick.
Another option is to set the image as the CSS background-image property of a container (such as a div) and set the background-size property to contain. This will stretch the image up to the size of the container.
A final option that you have to resort to if your case is a bit special is not such a bad option after all. In the updateLayout method of your page, you can refer to the element and explicitly set its CSS properties to fit. At that point you'll know all about the layout and can easily do the math to figure out what size image should be. Here's some code from one of my projects where I do this. Notice that I'm comparing the aspect ratio of the screen and the image to determine whether I should size to the width or the height. Unlike your situation (I'm guessing), my code makes sure the image fills the screen and excess is clipped. I'm guessing you want your img to be contained.
function setImagePosition() {
var img = q(".viewCamera #viewport img");
if (outerWidth/outerHeight > img.naturalWidth/img.naturalHeight) {
img.style.width = format("{0}px", outerWidth);
img.style.height = "";
img.style.top = format("{0}px", (outerHeight - img.clientHeight) / 2);
img.style.left = "0px";
} else {
img.style.width = "";
img.style.height = format("{0}px", outerHeight);
img.style.top = "0px";
img.style.left = format("{0}px", (outerWidth - img.clientWidth) / 2);
}
}
Hope that helps!
Are you referring to scaling HTML images? If so, you can set either one, width or height. Whichever you set, the other will scale and keep image aspect ratio.
How do I get the height and width of the canvas that has auto set?
Use ActualWidth and ActualHeight.