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));
}
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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
}
}
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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);
}
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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
}
}
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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
