First thing, I have an Editor.I can Identify if the user entered any text in that Edior.But i need to return something when the user tapped on the Editor. How to achieve this?
var msgEditor = new Editor
{
Margin = new Thickness(10, 0, 10, 0),
HeightRequest = App.ScreenHeight,
};
Secong thing, Editor is inside the scrollview.When i tapped on the Editor scrollview scrolls down.I need to manually pull down to see the cursor.How to set content offset when i tapped on Editor?
ScrollView scroll = new ScrollView
{
Content = msgEditor,
};
Content = scroll;
On the editor, you have the focus event that notifies you that the user tapped the editor. You can do as follow :
{
var editor = new Editor();
editor.Focused += EditorOnFocused;
}
private void EditorOnFocused(object sender, FocusEventArgs focusEventArgs)
{
//do your stuff
}
Related
I want to make a button that has a small icon (from FontAwesome) and text on it in my Xamarin app. I know I can just make a button but the problem is that I will require two fonts (the standard font for text and FontAwesome for the icon). Would anyone happen to know how I can do this, or if there is another way to achieve what I want?
Thanks!
As the json mentioned, I just made a simple implementation.
Create a new class inherit from Label, set FormattedText to combine the string(standard and icon), and add tap gesture on it .
public class MyLabel : Label
{
public delegate void MyHandler(object sender, EventArgs e);
public event MyHandler myEvent;
public MyLabel(string _myIcon, string _myText)
{
//build the UI
FormattedString text = new FormattedString();
text.Spans.Add(new Span { Text = _myIcon ,FontFamily= "FontAwesome5Free-Regular" });
text.Spans.Add(new Span { Text = _myText, TextColor = Color.Red ,BackgroundColor = Color.Blue });
FormattedText = text;
//tap event
TapGestureRecognizer tap = new TapGestureRecognizer();
tap.Tapped += (sender,e) => {
myEvent(sender,e);
};
}
}
Usage
MyLabel label = new MyLabel("", "test");
label.myEvent += (sener,e) =>
{
//do something when tapping
};
Content = label;
For how to integrate FontAwesome in Xamarin.Forms ,refer to
https://montemagno.com/xamarin-forms-custom-fonts-everywhere/.
I would like to add a button dynamically in StackLayout when "add" button is clicked. I wrote stacklayoutname.children.add(button), it does not giving me the thing i am looking for.
In xaml:
<StackLayout x:Name="layout">
<Button Text="add" Clicked="Addbutton"/>
</StackLayout>
In code:
private void Addbutton(object sender, EventArgs e)
{
var layout = new StackLayout();
var btn = new Button { Text = "New button", FontSize = 30, TranslationY = 30 };
this.Content = layout;
layout.Children.Add(btn);
}
It is giving only new button and add button is disappearing, but I want whenever we click on add button it should give number of new button equal to the number of clicks on add button.
Since you already have a StackLayout, there's no need to add a new one, because it replaces the old one if you do. The following will add a button to the StackLayout on every button click.
// Define a field for StackLayout
StackLayout parent;
public void Addbutton(object sender, EventArgs e)
{
// Define a new button
Button newButton = new Button { Text = "New Button" };
// Creating a binding
newButton.SetBinding(Button.CommandProperty, new Binding ("ViewModelProperty"));
// Set the binding context after SetBinding method calls for performance reasons
newButton.BindingContext = viewModel;
// Set StackLayout in XAML to the class field
parent = layout;
// Add the new button to the StackLayout
parent.Children.Add(newButton);
}
For more information about Binding, check out BindableObject Class and Data Binding Basics.
I am working on Xamarin form in which header title will have weather temperature and weather icon on its right side.
For example
New York 60' F SunnyIcon
I am using openweather api to fetch the data.
Problem is, I am not able to create a dynamic image holder on the Xamarin Form Header.
How to have a dynamic image on the Xamarin Form Header?
Attached is a sample app which i am working on based on source code which i downloaded from github ...
I'm not sure what you mean by "Header," but if you're trying to add an icon to the Navigation Bar, you can do that by calling ToolbarItems.add() in the constructor of your page like this:
public myPage()
{
InitializeComponent();
ToolbarItems.Add(new ToolbarItem("Weather", "WeatherIcon.png", async () =>
{
//Code to Execute when Icon is tapped
}));
}
When adding the ToolbarItem, the first parameter is the name of the item, the second is the name of the image that will be displayed at the end of the Navigation bar, and the last one is optional which creates a method that is executed when the icon is tapped.
If you need the icon to be different depending on the current weather, you can do that like this:
public myPage()
{
InitializeComponent();
string weatherIconString = "";
if(weather.isSunny) // Edit contition however you need
weatherIconString = "SunnyIcon.png";
else
weatherIconString = "CloudyIcon.png";
ToolbarItems.Add(new ToolbarItem("Weather", weatherIconString));
}
You have to write a custom renderer like this: and the result:
public class CustomNavigationPageRenderer : NavigationRenderer
{
public override void ViewDidLoad()
{
//I'm getting width and height so i can rescale the image
nfloat navigationBarWidth = NavigationBar.Frame.Width;
nfloat navigationBarHeight = NavigationBar.Frame.Height;
//you can load image from your bundle,so you can add your weather icons on bundle -> under Resources folder
var img = UIImage.FromBundle("navigationbarbackground.jpg");
//create image context to draw image
UIGraphics.BeginImageContextWithOptions(new CGSize(navigationBarWidth, navigationBarHeight), true, 0);
//I'm filling the background with a color so it is the same as with my background image color
UIColor.FromRGB(54, 60, 65).SetFill();
UIGraphics.RectFill(new CGRect(0, 0, navigationBarWidth, navigationBarHeight));
//draw your image according to the coordinates of the navigation bar, i put it to the right top with a small right padding,
//you have to play with coordinates according to your needs
img.Draw(new CGRect(navigationBarWidth - navigationBarHeight - 30,//move 30px to the left (do not paste to right border :))
0, navigationBarHeight, navigationBarHeight));
UIImage backgroundImage = UIGraphics.GetImageFromCurrentImageContext();
UIGraphics.EndImageContext();
NavigationBar.SetBackgroundImage(backgroundImage, UIBarMetrics.Default);
//bonus :) change your title color
UINavigationBar.Appearance.SetTitleTextAttributes(new UITextAttributes()
{
TextColor = UIColor.White,
});
base.ViewDidLoad();
}
}
I've created some pages
this.content1 = new DetailPage("ContentPage1");
this.content2 = new DetailPage("ContentPage2");
and I have defined a field
private View detailView;
with the following layout
Content = new StackLayout
{
Padding = new Thickness(0, Device.OnPlatform<int>(20, 0, 0), 0, 0),
Orientation = StackOrientation.Horizontal,
Children = {
buttonContainer,
this.detailView,
},
};
On a button click the detailView should be exchanged
private void Button1_Clicked(object sender, EventArgs e)
{
this.detailView = this.content1.Content;
}
The click event is called, but the view isn't updated. Is this the wrong way to exchange a "subview" in a container? How is this done?
You need to remove the current detailView from the Children collection and then add your new view afterward. Simply swapping the value of detailView will not affect the visual UI.
If I am understanding the context of your code snippets correctly, then this should resolve the problem in your Button1_Clicked handler:
((StackLayout) Content).Children.Remove(this.detailView);
this.detailView = this.content1.Content;
((StackLayout) Content).Children.Add(this.detailView);
I am creating a chat window with text box in the bottom and send bottom. when i click on text box keyboard is appearing, but is showing the gap between text box and keyboard. how to remove the gap between text box and Keyboard in windows phone
Good news! I have managed to figure out a fix for this. The below code stops the page from being moved up at all and then adds a margin to the bottom of the text box to place it above the keyboard. The value below of 417 seems to work well for me but you can change this to whatever you like. Using this method also stops other content being pushed off screen like the conversation as it will be fully scrollable while the keyboard is active.
private void TextBox_GotFocus_1(object sender, RoutedEventArgs e)
{
var rootFrame = Application.Current.RootVisual as PhoneApplicationFrame;
rootFrame.RenderTransform = new CompositeTransform() { TranslateY = +0 };
TextInput2.Margin = new Thickness(12, 0, 12, 417);
}
private void TextBox_LostFocus_1(object sender, RoutedEventArgs e)
{
var rootFrame = Application.Current.RootVisual as PhoneApplicationFrame;
rootFrame.RenderTransform = new CompositeTransform() { TranslateY = +0 };
TextInput2.Margin = new Thickness(12, 0, 12, 12);
}