static void SafeExecute(this ICommand dragCommand, ClickDragInfo dragInfo, object parameter)
{
var args = new MouseDragCommandArgs {
DragInfo = dragInfo, Parameter = parameter
};
if (dragCommand != null && dragCommand.CanExecute(args))
{
dragCommand.Execute(args);
}
}
static void OnMouseButtonDown( object sender, MouseButtonEventArgs e )
{
var element = (FrameworkElement)sender;
MouseState mouseState = GetMouseState( e, element );
// Trigger down commands.
ICommand leftDownCommand = GetLeftMouseDownCommand( element );
if ( e.ChangedButton == MouseButton.Left )
{
leftDownCommand.SafeExecute( mouseState );
}
ICommand rightDownCommand = GetRightMouseDownCommand( element );
if ( e.ChangedButton == MouseButton.Right )
{
rightDownCommand.SafeExecute( mouseState );
}
// Track click commands.
ICommand leftClickCommand = e.ChangedButton == MouseButton.Left
? GetLeftClickCommand( element )
: GetRightClickCommand( element );
Dictionary<object, ClickDragInfo> clickInfo = e.ChangedButton == MouseButton.Left
? LeftClickInfo
: RightClickInfo;
if ( leftClickCommand != null && e.ChangedButton == MouseButton.Left )
{
var info = new ClickDragInfo
{
Mouse = mouseState,
State = ClickDragState.Start,
StartPosition = mouseState.Position
};
if ( !clickInfo.ContainsKey( sender ) )
{
clickInfo.Add( sender, info );
}
}
_previousPosition = mouseState.Position.Relative;
_distanceDragged = 0;
// Trigger click drag commands.
ICommand clickDragCommand = e.ChangedButton == MouseButton.Left
? GetLeftClickDragCommand( element )
: GetRightClickDragCommand( element );
Dictionary<object, ClickDragInfo> dragInfo = e.ChangedButton == MouseButton.Left
? LeftClickDragInfo
: RightClickDragInfo;
if ( clickDragCommand != null )
{
if ( GetDragCapturesMouse( element ) )
{
// TODO: What to do if capturing the mouse fails?
element.CaptureMouse();
}
var info = new ClickDragInfo
{
Mouse = mouseState,
State = ClickDragState.Start,
StartPosition = mouseState.Position
};
clickDragCommand.SafeExecute( info );
if ( !dragInfo.ContainsKey( sender ) )
{
dragInfo.Add( sender, info );
}
}
e.Handled = true;
}
static void SafeExecute( this ICommand dragCommand, ClickDragInfo dragInfo, object parameter )
{
var args = new MouseDragCommandArgs { DragInfo = dragInfo, Parameter = parameter };
if ( dragCommand != null && dragCommand.CanExecute( args ) )
{
dragCommand.Execute( args );
}
}
static void OnMouseButtonDown(object sender, MouseButtonEventArgs e)
{
var element = (FrameworkElement)sender;
MouseState mouseState = GetMouseState(e, element);
bool isLeftButton = e.ChangedButton == MouseButton.Left;
// Trigger down commands.
ICommand leftDownCommand = GetLeftMouseDownCommand(element);
if (isLeftButton)
{
leftDownCommand.SafeExecute(mouseState, GetLeftMouseDownCommandParameter(element));
}
ICommand rightDownCommand = GetRightMouseDownCommand(element);
if (e.ChangedButton == MouseButton.Right)
{
rightDownCommand.SafeExecute(mouseState, GetRightMouseDownCommandParameter(element));
}
// Track click commands.
ICommand clickCommand = isLeftButton ? GetLeftClickCommand(element) : GetRightClickCommand(element);
Dictionary <object, ClickDragInfo> clickInfo = isLeftButton ? LeftClickInfo : RightClickInfo;
if (clickCommand != null)
{
var info = new ClickDragInfo
{
Sender = element,
Mouse = mouseState,
State = ClickDragState.Start,
StartPosition = mouseState.Position
};
if (!clickInfo.ContainsKey(sender))
{
clickInfo.Add(sender, info);
}
}
MoveState moveState;
MoveStates.TryGetValue(element, out moveState);
moveState.PreviousPosition = mouseState.Position.Relative;
moveState.DistanceDragged = 0;
MoveStates[element] = moveState;
// Trigger click drag commands.
ICommand clickDragCommand = isLeftButton ? GetLeftClickDragCommand(element) : GetRightClickDragCommand(element);
object clickDragParameter = isLeftButton ? GetLeftClickDragCommandParameter(element) : GetRightClickDragCommandParameter(element);
Dictionary <object, ClickDragInfo> dragInfo = isLeftButton ? LeftClickDragInfo : RightClickDragInfo;
if (clickDragCommand != null)
{
if (GetDragCapturesMouse(element))
{
// TODO: What to do if capturing the mouse fails?
element.CaptureMouse();
}
var info = new ClickDragInfo
{
Sender = element,
Mouse = mouseState,
State = ClickDragState.Start,
StartPosition = mouseState.Position
};
clickDragCommand.SafeExecute(info, clickDragParameter);
if (!dragInfo.ContainsKey(sender))
{
dragInfo.Add(sender, info);
}
}
e.Handled = true;
}
static void OnMouseButtonDown( object sender, MouseButtonEventArgs e )
{
var element = (FrameworkElement)sender;
MouseState mouseState = GetMouseState( e, element );
bool isLeftButton = e.ChangedButton == MouseButton.Left;
// Trigger down commands.
ICommand leftDownCommand = GetLeftMouseDownCommand( element );
if ( isLeftButton )
{
leftDownCommand.SafeExecute( mouseState, GetLeftMouseDownCommandParameter( element ) );
}
ICommand rightDownCommand = GetRightMouseDownCommand( element );
if ( e.ChangedButton == MouseButton.Right )
{
rightDownCommand.SafeExecute( mouseState, GetRightMouseDownCommandParameter( element ) );
}
// Track click commands.
ICommand clickCommand = isLeftButton ? GetLeftClickCommand( element ) : GetRightClickCommand( element );
Dictionary<object, ClickDragInfo> clickInfo = isLeftButton ? LeftClickInfo : RightClickInfo;
if ( clickCommand != null )
{
var info = new ClickDragInfo
{
Sender = element,
Mouse = mouseState,
State = ClickDragState.Start,
StartPosition = mouseState.Position
};
if ( !clickInfo.ContainsKey( sender ) )
{
clickInfo.Add( sender, info );
}
}
MoveState moveState;
MoveStates.TryGetValue( element, out moveState );
moveState.PreviousPosition = mouseState.Position.Relative;
moveState.DistanceDragged = 0;
MoveStates[ element ] = moveState;
// Trigger click drag commands.
ICommand clickDragCommand = isLeftButton ? GetLeftClickDragCommand( element ) : GetRightClickDragCommand( element );
object clickDragParameter = isLeftButton ? GetLeftClickDragCommandParameter( element ) : GetRightClickDragCommandParameter( element );
Dictionary<object, ClickDragInfo> dragInfo = isLeftButton ? LeftClickDragInfo : RightClickDragInfo;
if ( clickDragCommand != null )
{
if ( GetDragCapturesMouse( element ) )
{
// TODO: What to do if capturing the mouse fails?
element.CaptureMouse();
}
var info = new ClickDragInfo
{
Sender = element,
Mouse = mouseState,
State = ClickDragState.Start,
StartPosition = mouseState.Position
};
clickDragCommand.SafeExecute( info, clickDragParameter );
if ( !dragInfo.ContainsKey( sender ) )
{
dragInfo.Add( sender, info );
}
}
e.Handled = true;
}
