Metro style App ContextMenu Summary-白红宇

Metro style App ContextMenu Summary。

Fist let us see the effect pictures。

Picture 1.

Picture 2.

Get the frameworkElement Rect。

                
public
static
Rect GetElementRect(FrameworkElement element)
{ 
    
GeneralTransform buttonTransform = element.TransformToVisual(
null
);
    
Point point = buttonTransform.TransformPoint(
new
Point());
    
return
new
Rect(point, 
new
Size(element.ActualWidth, element.ActualHeight));
}
        
      

Next is a image righttap event。

                
private
async 
void
AttachmentImage_RightTapped(
object
sender, RightTappedRoutedEventArgs e)
{ 
    
var
menu = 
new
PopupMenu();
    
menu.Commands.Add(
new
UICommand(
"Open with"
, (command) =>
    
{ 
        
//ToDo:function
    
}));
    
menu.Commands.Add(
new
UICommand(
"Save attachment"
, (command) =>
    
{ 
        
//ToDo:function
    
}));
    
var
chosenCommand = await menu.ShowForSelectionAsync(GetElementRect((FrameworkElement)sender));
    
if
(chosenCommand == 
null
) 
    
{ 
        
// The command is null if no command was invoked.
        
//ToDo：function
    
}
}
        
      

2.Another sample

returns a rect for selected text

                
// returns a rect for selected text
private
Rect GetTextboxSelectionRect(TextBox textbox)
{ 
    
Rect rectFirst, rectLast;
    
if
(textbox.SelectionStart == textbox.Text.Length)
    
{ 
        
rectFirst = textbox.GetRectFromCharacterIndex(textbox.SelectionStart - 1, 
true
);
    
}
    
else
    
{ 
        
rectFirst = textbox.GetRectFromCharacterIndex(textbox.SelectionStart, 
false
);
    
}
    
int
lastIndex = textbox.SelectionStart + textbox.SelectionLength;
    
if
(lastIndex == textbox.Text.Length)
    
{ 
        
rectLast = textbox.GetRectFromCharacterIndex(lastIndex - 1, 
true
);
    
}
    
else
    
{ 
        
rectLast = textbox.GetRectFromCharacterIndex(lastIndex, 
false
);
    
}
    
GeneralTransform buttonTransform = textbox.TransformToVisual(
null
);
    
Point point = buttonTransform.TransformPoint(
new
Point());
    
return
new
Rect(point.X + rectFirst.Left,
        
point.Y + rectFirst.Top,
        
rectLast.Right - rectFirst.Left,
        
rectLast.Bottom - rectFirst.Top);
}
        
      

Next is a TextBox ContextMenuOpening event.

                
private
async 
void
ReadOnlyTextBox_ContextMenuOpening(
object
sender, ContextMenuEventArgs e)
{ 
    
e.Handled = 
true
;
    
TextBox textbox = (TextBox)sender;
    
if
(textbox.SelectionLength > 0)
    
{ 
        
var
menu = 
new
PopupMenu();
        
menu.Commands.Add(
new
UICommand(
"Copy"
, 
null
, 1));
        
menu.Commands.Add(
new
UICommandSeparator());
        
menu.Commands.Add(
new
UICommand(
"Highlight"
, 
null
, 2));
        
menu.Commands.Add(
new
UICommand(
"Look up"
, 
null
, 3));
        
Rect rect = GetTextboxSelectionRect(textbox);
        
var
chosenCommand = await menu.ShowForSelectionAsync(rect);
        
if
(chosenCommand != 
null
)
        
{ 
            
switch
((
int
)chosenCommand.Id)
            
{ 
                
case
1:
                    
//Next is copy function
                    
String selectedText = ((TextBox)sender).SelectedText;
                    
var
dataPackage = 
new
DataPackage();
                    
dataPackage.SetText(selectedText);
                    
Clipboard.SetContent(dataPackage); 
                    
break
;
                
case
2:
                    
//Todo:function
                    
break
;
                
case
3:
                    
//Todo:function
                    
break
;
            
}
        
}
        
else
        
{ 
            
//Todo:function
        
}
    
}
    
else
    
{ 
        
//Todo:function
    
}
}
        
      

The source sample is from msdn.

本文转自Work Hard Work Smart博客园博客，原文链接：http://www.cnblogs.com/linlf03/archive/2012/08/01/2618865.html，如需转载请自行联系原作者