| public static ScaleAt ( double scaleX, double scaleY, double centerX, double centerY ) : Avalonia.Matrix | ||
| scaleX | double | Scaling factor that is applied along the x-axis. |
| scaleY | double | Scaling factor that is applied along the y-axis. |
| centerX | double | The center X-coordinate of the scaling. |
| centerY | double | The center Y-coordinate of the scaling. |
| return | Avalonia.Matrix | |
/// <summary>
/// Calculate pan and zoom matrix based on provided streatch mode.
/// </summary>
/// <param name="panelWidth">The panel width.</param>
/// <param name="panelHeight">The panel height.</param>
/// <param name="elementWidth">The element width.</param>
/// <param name="elementHeight">The element height.</param>
/// <param name="mode">The stretch mode.</param>
public static Matrix CalculateMatrix(double panelWidth, double panelHeight, double elementWidth, double elementHeight, StretchMode mode)
{
var zx = panelWidth / elementWidth;
var zy = panelHeight / elementHeight;
var cx = elementWidth / 2.0;
var cy = elementHeight / 2.0;
switch (mode)
{
default:
case StretchMode.None:
return(Matrix.Identity);
case StretchMode.Fill:
return(MatrixHelper.ScaleAt(zx, zy, cx, cy));
case StretchMode.Uniform:
{
var zoom = Min(zx, zy);
return(MatrixHelper.ScaleAt(zoom, zoom, cx, cy));
}
case StretchMode.UniformToFill:
{
var zoom = Max(zx, zy);
return(MatrixHelper.ScaleAt(zoom, zoom, cx, cy));
}
}
}
public void Fill(Rect panelSize, Rect elementSize)
{
if (_element != null)
{
double pw = panelSize.Width;
double ph = panelSize.Height;
double ew = elementSize.Width;
double eh = elementSize.Height;
double zx = pw / ew;
double zy = ph / eh;
_matrix = MatrixHelper.ScaleAt(zx, zy, ew / 2.0, eh / 2.0);
Invalidate();
}
}
public void Extent(Rect panelSize, Rect elementSize)
{
if (_element != null)
{
double pw = panelSize.Width;
double ph = panelSize.Height;
double ew = elementSize.Width;
double eh = elementSize.Height;
double zx = pw / ew;
double zy = ph / eh;
double zoom = Min(zx, zy);
double cx = ew / 2.0;
double cy = eh / 2.0;
_matrix = MatrixHelper.ScaleAt(zoom, zoom, cx, cy);
Invalidate();
}
}