WPF Moving Controls in XYZ

The moment to create something like a game as NeoPets in WPF is coming, today I have made improvements using controls, here I show you how to add movement to the controls on runtime, I have add moving using the mouse and using the keyboard, download the source here
To do that, in the xaml file add to the button:

button keydown="OnKey" previewmousemove="OnMove"

And in the .cs add the next methods:

public void OnMove(object o, MouseEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
b = (Button)o;
SetZ();
Canvas.SetZIndex(b, 99);
b.Margin = new Thickness(e.MouseDevice.GetPosition(null).X - b.Width / 2, e.MouseDevice.GetPosition(null).Y - b.Height/2, b.Margin.Right, b.Margin.Bottom);
}
}

and for using the keyboard:

public void OnKey(object o, KeyEventArgs e)
{
int delta = 20;
b = (Button)o;
SetZ();
Canvas.SetZIndex(b, 99);
switch (e.Key)
{
case Key.W:
b.Margin = new Thickness(b.Margin.Left, b.Margin.Top - delta, b.Margin.Right, b.Margin.Bottom);
break;
case Key.S:
b.Margin = new Thickness(b.Margin.Left, b.Margin.Top + delta, b.Margin.Right, b.Margin.Bottom);
break;
case Key.A:
b.Margin = new Thickness(b.Margin.Left - delta, b.Margin.Top, b.Margin.Right, b.Margin.Bottom);
break;
case Key.D:
b.Margin = new Thickness(b.Margin.Left + delta, b.Margin.Top, b.Margin.Right, b.Margin.Bottom);
break;
default:
break;
}
}

Apparently is easy, the matter about all of this, is that there's only few docs, so I hope you find this useful and encourage you to improve your apps (uis).

Focusing (graphically talking) controls

Few days ago my nephew show me a web called neopets, and there I watched plenty of mini flash games, I was thinking on the possibilities on WPF and I decided to start playing with the effects on runtime, here I show you how to change on runtime the focus of a control:

Download sample here



using System.Windows.Media.Effects;
using System.Windows.Threading;
using System.Windows.Input;

...


BlurBitmapEffect blur;
Button b;

System.Timers.Timer t_1;
public void AutoFocus(object o, EventArgs e)
{
b = (Button)o;
blur = new BlurBitmapEffect();
b.BitmapEffect = blur;
blur.Radius=5;
t_1 = new System.Timers.Timer(1);
t_1.Elapsed +=new System.Timers.ElapsedEventHandler(OnTime);
t_1.Start();
}

...


void OnTime(object sender, System.Timers.ElapsedEventArgs e)
{
this.Dispatcher.Invoke(DispatcherPriority.Background, new DispatcherOperationCallback(delegate
{
if (blur.Radius > 0)
blur.Radius--;
else
t_1.Stop();
return null;
}), null);
}

...


public void AutoDifuse(object o, EventArgs e)
{
BlurBitmapEffect blur = new BlurBitmapEffect();
blur.Radius = 5;
((Button)o).BitmapEffect = blur;
}

...



The code is easy to understand, the only matter is the strange way to use a Timer, because if you try to ommit the Dispatcher.Invoke you will have threading problems. The rest I think is easy to understand. Tomorrow I'll show you how to move controls on runtime

Solved the GridView Header

Just only an hour ago, I have solved the hard matter to customize the header, due to the matters with the xaml code inside an article here is the link to my comment with the code

The codeproject comment with the code is here

I hope you find it useful or a year of this decade (when you decide to use WPF)