// This sets the view to be centered at x,y
/*private void ScrollTo(float x, float y)
* {
* // Scroll now
* renderer2d.PositionView(x, y);
* this.OnViewChanged();
*
* // Redraw
* General.MainWindow.RedrawDisplay();
*
* // Determine new unprojected mouse coordinates
* mousemappos = renderer2d.DisplayToMap(mousepos);
* General.MainWindow.UpdateCoordinates(mousemappos);
* }*/
// This zooms
private void ZoomBy(float deltaz)
{
Vector2D zoompos;
// This will be the new zoom scale
float newscale = renderer2d.Scale * deltaz;
// Limit scale
if (newscale > SCALE_MAX)
{
newscale = SCALE_MAX;
}
if (newscale < SCALE_MIN)
{
newscale = SCALE_MIN;
}
// Get the dimensions of the display
Vector2D clientsize = new Vector2D(General.Map.Graphics.RenderTarget.ClientSize.Width,
General.Map.Graphics.RenderTarget.ClientSize.Height);
// When mouse is inside display
if (mouseinside)
{
// Zoom into or from mouse position
zoompos = (mousepos / clientsize) - new Vector2D(0.5f, 0.5f);
}
else
{
// Zoom into or from center
zoompos = new Vector2D(0f, 0f);
}
// Calculate view position difference
Vector2D diff = ((clientsize / newscale) - (clientsize / renderer2d.Scale)) * zoompos;
Vector2D offset = ClampViewOffset(renderer2d.OffsetX - diff.x, renderer2d.OffsetY + diff.y); //mxd
// Zoom now
renderer2d.PositionView(offset.x, offset.y);
renderer2d.ScaleView(newscale);
this.OnViewChanged();
//mxd. Change grid size?
MatchGridSizeToDisplayScale();
// Redraw
General.MainWindow.RedrawDisplay();
// Give a new mousemove event to update coordinates
if (mouseinside)
{
OnMouseMove(new MouseEventArgs(mousebuttons, 0, (int)mousepos.x, (int)mousepos.y, 0));
}
}