The blur effect in silverlight 3 is nice:
<StackPanel HorizontalAlignment="Left">
<Button x:Name="Button1"
Content="Click This"
Click="Button1_Click">
<Button.Effect>
<BlurEffect Radius="2"/>
</Button.Effect>
</Button>
</StackPanel>
But how would I do it in code behind:
private void Button1_Click(object sender, RoutedEventArgs e)
{
Button1.Content = "was clicked";
//Button1.Effect.bl...
}
Silverlight 3 only
private void Button1_Click(object sender, RoutedEventArgs e)
{
((Button)sender).Content = "was clicked";
((Button)sender).Effect = new BlurEffect { Radius = 8 };
}
Related
I have trouble with moving a canvas in a Window.
<Canvas x:Name="Canvas1" Height="200" Grid.Column="1" Margin="10,15,92,54" Grid.Row="1" Background="#FFECECEC" Grid.RowSpan="2" MouseDown="Canvas_MouseDown" MouseUp="Canvas_MouseUp" MouseMove="Canvas_MouseMove" >
<TextBox Height="100" Width="100" Margin="50,50,327,65" Background="Red"/>
<TextBox Height="100" Width="100" Margin="10,15,327,65" Background="Blue" />
<Canvas.RenderTransform>
<TransformGroup>
<TranslateTransform x:Name="translate" />
</TransformGroup>
</Canvas.RenderTransform>
</Canvas>
This is code behind:
private void Canvas_MouseDown(object sender, MouseButtonEventArgs e)
{
Canvas1.CaptureMouse();
point = Mouse.GetPosition(Grid1);
}
private void Canvas_MouseMove(object sender, MouseEventArgs e)
{
if (Canvas1.IsMouseCaptured)
{
translate.X = e.GetPosition(Grid1).X - point.X;
translate.Y = e.GetPosition(Grid1).Y - point.Y;
}
}
private void Canvas_MouseUp(object sender, MouseButtonEventArgs e)
{
Canvas1.ReleaseMouseCapture();
}
First time, it seem woork fine.
But second time i try to click on my canvas, this move but from initial position.
How can i fix it?
When initializing point on mouse down, subtract the current translation:
private void Canvas1_MouseDown(object sender, MouseButtonEventArgs e)
{
Canvas1.CaptureMouse();
point = Mouse.GetPosition(Grid1);
point.X -= translate.X;
point.Y -= translate.Y;
}
Alternatively, always only add the difference vector:
private void Canvas1_MouseDown(object sender, MouseButtonEventArgs e)
{
Canvas1.CaptureMouse();
point = Mouse.GetPosition(Grid1);
}
private void Canvas1_MouseMove(object sender, MouseEventArgs e)
{
if (Canvas1.IsMouseCaptured)
{
var p = e.GetPosition(Grid1);
var diff = p - point;
point = p;
translate.X += diff.X;
translate.Y += diff.Y;
}
}
Also make sure the Grid doesn't position the Canvas, by setting the Canvas alignment to Top/Left:
<Canvas x:Name="Canvas1" HorizontalAlignment="Left" VerticalAlignment="Top" ...>
And probably don't set a Margin, but instead initialize the TranslateTransform appropriately.
I created a button and wrote its behaviour to clear the scatter view, but it didnt work:
private void Button1_Click(object sender, RoutedEventArgs e)
{
DependencyObject parent = VisualTreeHelper.GetParent(this);
ScatterViewItem svi = null;
while (parent as ScatterView == null)
{
if (parent is ScatterViewItem)
svi = parent as ScatterViewItem;
parent = VisualTreeHelper.GetParent(parent);
}
((ScatterView)parent).Items.Remove(svi);
}
Before this, I thought to reset the application by this code which didnt work either: (I added using System.Diagnostics; )
private void Button1_Click(object sender, RoutedEventArgs e)
{
Process.Start(Application.ResourceAssembly.Location);
Application.Current.Shutdown();
}
the xaml:
<s:SurfaceButton Content="Clear" Name="Button1" Click="Button1_Click" VerticalAlignment="Bottom" HorizontalAlignment="Center"/>
can you tell me what i miss,
thanks
You can simply give the ScatterView a name
<s:ScatterView x:Name="scatterView" ... />
and then access it from code behind:
private void Button1_Click(object sender, RoutedEventArgs e)
{
scatterView.Items.Clear();
}
I am working in Silverlight 5 webbrowser control to show the Contents. I have Used this Code Which Worked Fine For me.
Xaml:
<TextBox x:Name="txtUri" Margin="5" HorizontalAlignment="Stretch" />
<Button x:Name="btnGo" Grid.Column="1" Content="Go" Click="OnGo" Margin="5" />
<WebBrowser LoadCompleted="browserControl_LoadCompleted" ScriptNotify="browserControl_ScriptNotify" Grid.Row="1" Margin="5" x:Name="browserControl" />
.CS
private void webBrowser_LoadCompleted(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
MessageBox.Show("called");
}
private void browserControl_LoadCompleted(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
MessageBox.Show("called");
btnGo.IsEnabled = true;
}
private void OnGo(object sender, RoutedEventArgs e)
{
btnGo.IsEnabled = false;
browserControl.Navigate(new Uri(txtUri.Text, UriKind.RelativeOrAbsolute));
}
private void browserControl_ScriptNotify(object sender, NotifyEventArgs e)
{
if (!string.IsNullOrEmpty(e.Value))
{
MessageBox.Show(e.Value);
}
}
It Disable the Button And Search For TextBox entered URI but When i change the OnGo Method
private void OnGo(object sender, RoutedEventArgs e)
{
btnGo.IsEnabled = false;
browserControl.NavigateToString("<html> <head><title>Sample Readme File</title><script type='text/javascript' language='javascript'> function GetSelectedText() {window.external.notify('Text to show in Message box');}</script></head> <body> <a onclick='GetSelectedText()'>Click Me</a> <p>Sample Readme Content</p> </body></html>");
}
And Add the ScriptNotify Event Handler
void webBrowser_ScriptNotify(object sender, NotifyEventArgs e)
{
if (!string.IsNullOrEmpty(e.Value))
{
MessageBox.Show(e.Value);
}
}
Then webBrowser_LoadCompleted event does not Triggered.
What is the difference behind these two.
Please Help!
I'm kinda confused with some problem, I'm doing a project where the user should be able to design questions with radio buttons, combo box, etc (kinda like toolbox from VS10 to design your XAML).
So far I can drag and drop an UIElement that I previously created, problem comes when the user creates a new element from my toolbox, I can't find the way to make that new UIElement to get the same events from my previosly created UIElement. Take a look at the code
<Window x:Class="WpfApplication1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Canvas Height="190" HorizontalAlignment="Left" Margin="158,41,0,0" Name="canvas1" VerticalAlignment="Top" Width="322" AllowDrop="True">
<Button Content="PROBANDO" Height="23" Name="button" Width="75" Canvas.Left="113" Canvas.Top="43" PreviewMouseDown="button_PreviewMouseDown" PreviewMouseMove="button_PreviewMouseMove" MouseUp="button_MouseUp" IsEnabled="True" />
<TextBlock Canvas.Left="99" Canvas.Top="147" Height="23" Name="textBlock" Text="" Width="107" />
</Canvas>
<ListBox Height="190" Name="listBox" Width="126" Margin="12,41,365,80" >
<ListBoxItem Content="Radio Button" Selected="radio_Selected" Name="radio" />
<ListBoxItem Content="Text" Selected="text_Selected" Name="text" />
<ListBoxItem Content="Combo Box" Name="combo" Selected="combo_Selected" />
</ListBox>
</Grid>
</Window>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
Point p;
private void button_MouseUp(object sender, MouseButtonEventArgs e)
{
button.ReleaseMouseCapture();
}
private void button_PreviewMouseDown(object sender, MouseButtonEventArgs e)
{
button.CaptureMouse();
p = e.GetPosition(canvas1);
}
private void button_PreviewMouseMove(object sender, MouseEventArgs e)
{
Point x = e.GetPosition(canvas1);
if (e.LeftButton == MouseButtonState.Pressed)
{
Canvas.SetLeft(button, Canvas.GetLeft(button) + (x.X - p.X));
Canvas.SetTop(button, Canvas.GetTop(button) + (x.Y - p.Y));
}
p = x;
}
private void generic_PreviewMouseDown(UIElement sender, MouseEventArgs e)
{
Point x = e.GetPosition(canvas1);
if (e.LeftButton == MouseButtonState.Pressed)
{
Canvas.SetLeft(sender, Canvas.GetLeft(sender) + (x.X - p.X));
Canvas.SetTop(sender, Canvas.GetTop(sender) + (x.Y - p.Y));
}
p = x;
}
private void radio_Selected(object sender, RoutedEventArgs e)
{
RadioButton newRadio = new RadioButton();
canvas1.Children.Add(newRadio);
newRadio.PreviewMouseDown += generic_PreviewMouseDown(newRadio,?????);
textBlock.Text = listBox.SelectedIndex.ToString();
}
private void text_Selected(object sender, RoutedEventArgs e)
{
TextBox newText = new TextBox();
canvas1.Children.Add(newText);
textBlock.Text = (String)listBox.SelectedIndex.ToString();
}
private void combo_Selected(object sender, RoutedEventArgs e)
{
Console.Write("Combo");
textBlock.Text = (String)listBox.SelectedIndex.ToString();
}
}
Thanks!
If all you want to do is handle the mouse down on the new RadioButton, change this line:
newRadio.PreviewMouseDown += generic_PreviewMouseDown(newRadio,?????);
To this:
newRadio.PreviewMouseDown += generic_PreviewMouseDown;
Edit
And then you need to change the generic_PreviewMouseDown to the following:
private void generic_PreviewMouseDown(object sender, MouseEventArgs e)
{
UIElement elem = sender as UIElement;
Point x = e.GetPosition(canvas1);
if (e.LeftButton == MouseButtonState.Pressed)
{
Canvas.SetLeft(elem, Canvas.GetLeft(elem) + (x.X - p.X));
Canvas.SetTop(elem, Canvas.GetTop(elem) + (x.Y - p.Y));
}
p = x;
}
I am using slider control for an audio player in silverlight application. The slider is not moving while audio is playing.
The below one is my XAML code . How to get it?
<Slider x:Name="Slider" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2"
MouseLeftButtonDown="MouseClicked" MouseLeftButtonUp="MouseReleased"
ValueChanged="Slider_ValueChanged" Height="30" Width="484" ></Slider>
Code behind for slider events:
private void Slider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
{
Audio.Pause();
Audio.Position = TimeSpan.FromSeconds(Slider.Value);
Audio.Play();
}
private void MouseClicked(object sender, MouseButtonEventArgs e)
{
Audio.Pause();
Audio.Position = TimeSpan.FromSeconds(Slider.Value);
}
private void MouseReleased(object sender, MouseButtonEventArgs e)
{
Audio.Play();
}
In Silverlight 3(as i know) MouseLeftButtonDown not working. You need to create own Handler in code. For example :
progress_bar.AddHandler(MouseLeftButtonDownEvent, new MouseButtonEventHandler(progress_bar_MouseLeftButtonDown), true);