i have a issues with default margin of a button on xamarin forms. i need to take off the margin. some thought how i can make this ?? i need to use custom renderer?
I really need this to join two elements without leaving space, a label and a button.
i already try with
<Button
BackgroundColor="Fuchsia"
BorderRadius="0"
BorderWidth="0"
Text="Test"
HeightRequest="50"
WidthRequest="60"
TextColor="#333333"
x:Name="btnBack"
Margin="0"
VerticalOptions="Start"
HorizontalOptions="Start" />
but this not work for me, nothing happened.
other guys says that making a custom renderer maybe will work.
What are you using to lay out the label and the button? If StackLayout you may need to set the StackLayout Spacing property to 0 to remove the gap between the label and the button. If Grid look at RowSpacing and ColumnSpacing properties.
If you want to change margins dynamically, you would write something like this in C#
button.margin = new thickness(0,0,0,0);
This would make the margins of the button 0.
You would potentially do this for all elements with a thickness to change that issue.
Related
I understand how to create a ToolbarItem and set it's Order equal to Secondary which will give me an overflow menu like so:
But I'm not sure how I could implement such a menu in other parts of my application. For instance in the app I'm currently working on, I've removed the toolbar and created my own meaning there is no way to set the ToolbarItems property. I can add a ImageButton for the 3 dots overflow menu icon but I cannot get it to display a menu like the out of the box implementation does.
I'd also like to use this in other parts of my app (not just on the toolbar) such as on some sort of CardView.
Has anyone dealt with this problem before?
You can use Absolute layout to achieve this:
<AbsoluteLayout>
<StackLayout RowSpacing="0" AbsoluteLayout.LayoutBounds="0,0,1,1" AbsoluteLayout.LayoutFlags="All">
<!--Main Content of the screen-->
</StackLayout>
<BoxView Color="Gray" AbsoluteLayout.LayoutBounds="1,0,250,250" AbsoluteLayout.LayoutFlags="PositionProportional" />
</AbsoluteLayout>
In the above code I have used a BoxView of Gray background for that menu toolbar to just show a demo, you can implement your view and set the width and height accordingly and make that view visible on click of icon which you will add on the toolbar.
Output:
This can be easily achieved using AbsoluteLayout in Xamarin.Forms
https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/layouts/absolute-layout
https://xamgirl.com/absolutelayout-in-xamarin-made-simple/
I'm using trial version of syncfusion for testing.
I'm tring to use comboBox in an stackLayout but it won't show. as long as it fill the whole line it works but when i try to use it in an stacklayout it stop showing.
what should i do to use comboBox within an horizontal stacklayout?
this is my xaml code
<StackLayout Orientation="Horizontal">
<Button Text="T"/>
<comboBox:SfComboBox />
</StackLayout>
You need to specify a height request, so it will "reserve space" for displaying the ComboBox.
Check this example, you can change the value of HeightRequest according to your needs.
<combobox:SfComboBox HeightRequest="40" x:Name="comboBox"/>
I have four rows and two columns.I need to display the background image to full grid.Please provide me solution.I had referred this creating background image in content page link:Xamarin Forms - how to add background image to a content page
.But how to set background image to grid layout.
Just add the Image to the first row and column, set ColumnSpan and RowSpan to cover your entire grid and set the Aspect to AdjustFit.
Then you add the other items you want to add to the grid.
A grid cell can hold more than just one element, however keep in mind that the last item in a cell will end up on top of the items having been added earlier.
For example:
<Grid>
<Image>
<Button>
</Grid>
The button is the last item in the order, so it will become the topmost item and be clickable. If you had the button first and the image last, the image would cover the button, which therefore would not be clickable.
You will have to do some AbsoluteLayout trickery here:
<AbsoluteLayout>
<Image AbsoluteLayout.LayoutBounds="0, 0, 1.0, 1.0" AbsoluteLayout.LayoutFlags="All" InputTransparent="true" Source="Your_Image" Aspect="AspectFill" />
<!--Your Grid Here-->
<Grid AbsoluteLayout.LayoutFlags="All" BackgroundColor="Transparent" AbsoluteLayout.LayoutBounds="0, 0, 1.0, 1.0" />
<AbsoluteLayout>
See to it that you place the image first in absolute layout so that it goes in the back,
and set its input transparent so it does not take any click events.
I am trying to resize an ActivityIndicator (in Xamarin.Forms), but the Scale property does not work and the HeightRequest just crops the ActivityIndicator.
<StackLayout>
<ActivityIndicator HorizontalOptions="Center" VerticalOptions="StartAndExpand" HeightRequest="20" IsRunning="True" />
</StackLayout>
This is the result.
Any suggestions on what I might be doing wrong?
It seems sizing itself is not supported on the ActivityIndicator. In this case, scaling is your friend.
The cutting-off you see happening is because the ActivityIndicator is inside a StackLayout. Because of how a StackLayout works, it will only take up the space it needs. Since scaling doesn't necessarily make your ActivityIndicator bigger, you have two options:
Replace your StackLayout with a Grid
Give your ActivityIndicator a WidthRequest and HeightRequest that is big enough to keep your scaled ActivityIndicator
Note: Talking about iOS here. Width and height seem to work on Android
Remove HeightRequest="20", it blocks your scale property.
Code should look like this
<ActivityIndicator HorizontalOptions="Center" VerticalOptions="StartAndExpand" Scale="2" IsRunning="True" />
Now, you can scale to whatever size you want.
I'm getting some performance issues with this code, where mousing over the canvas area is laggy if i leave in the canvases within the data template, but no lag if I take them out (but obviously the Canvas.Left bindings don't work so the ellipses are in the wrong place!) Is there a way to position these items without each one needing its own canvas?
<Canvas>
<ItemsControl ItemsSource="{Binding Path=SpatialData.TrainEvents.ArrDepEllipseOfLines}" Name="ctrlChartTrainEventsArrDep" >
<ItemsControl.ItemTemplate>
<DataTemplate>
<Canvas>
<Ellipse Width="{Binding EventShape.Width}" Height="{Binding EventShape.Height}" Stroke="{Binding Path=Stroke}" StrokeThickness="{Binding StrokeThickness}" Fill="{Binding Path=Fill}" Canvas.Left="{Binding CanvasPlacement.X}" Canvas.Top="{Binding CanvasPlacement.Y}" />
</Canvas>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Canvas>
Thanks very much,
Becky
Yes, you can remove the canvas in your ellipse. I think you'll find that your values for CanvasPlacement.X don't increment properly per ellipse and the effect your seeing is the fact that each element in your ItemsControl is actually placed in a StackPanel (the default behaviour and can be changed via the ItemsPanel property) which is then laying these out for you - most likely in a horizontal line.