Zooming (make things bigger)

[marcosgerene]

Hi everyone,

I am still developing my first "real-world" application on Avalonia. I am a bit ashamed to keep asking for help, but I need assistance with this technology transition.

In WPF, using ScaleTransformation, I have this result (you can see that things are bigger but in the same place):

var scaler = panel.LayoutTransform as ScaleTransform;

if (scaler == null)
{
	scaler = new ScaleTransform((double)ConfiguracaoLocal.Current.ConfiguracaoVisual.Zoom, (double)ConfiguracaoLocal.Current.ConfiguracaoVisual.Zoom);
	panel.LayoutTransform = scaler;
}

DoubleAnimation animator = new DoubleAnimation()
{
	Duration = new Duration(TimeSpan.FromMilliseconds(250)),
};

if (panel.Tag == null)
	panel.Tag = (double)(double)ConfiguracaoLocal.Current.ConfiguracaoVisual.Zoom;

if (e.Key == Key.D0 || e.Key == Key.NumPad0)
	panel.Tag = (double)1;
if (e.Key == Key.Add || e.Key == Key.OemPlus)
	panel.Tag = (double)panel.Tag + 0.05;
else if (e.Key == Key.Subtract || e.Key == Key.OemMinus)
	panel.Tag = (double)panel.Tag - 0.05;

animator.To = (double)panel.Tag;

scaler.BeginAnimation(ScaleTransform.ScaleXProperty, animator);
scaler.BeginAnimation(ScaleTransform.ScaleYProperty, animator);

I tried the same on Avalonia but it works as a "real zoom" instead of make things bigger inside my control.

if (e.KeyModifiers != KeyModifiers.Control)
    return;

var scaler = (this.RenderTransform as ScaleTransform) ?? new ScaleTransform(1, 1);

if (e.Key.IsIn(Key.OemPlus, Key.Add))
{
    scaler = new ScaleTransform(scaler.ScaleX + 0.05D, scaler.ScaleY + 0.05D);
}

else if (e.Key.IsIn(Key.OemMinus, Key.Subtract))
{
    scaler = new ScaleTransform(scaler.ScaleX - 0.05D, scaler.ScaleY - 0.05D);
}

else if (e.Key.IsIn(Key.NumPad0, Key.D0))
{
    scaler = new ScaleTransform(1, 1);
}

How can I achieve the same result as WPF in Avalonia?

Thank you,
Marcos

[timunie]

Use LayoutTransform-Control in Avalonia to get the desired result. Or ViewBox ;-)

[marcosgerene]

LayoutTransform-Control worked pretty well, thank you!