User zoom / pan applied on top of the automatic fit. More...

#include <sectiondiagram.h>

Collaboration diagram for openswmmvis::sectionview::DiagramViewport:

Public Member Functions
bool	isIdentity () const

Public Attributes
double	zoom = 1.0
	1.0 = fitted to the widget.

QPointF	panPx
	Additional translation, in screen pixels.

Detailed Description

User zoom / pan applied on top of the automatic fit.

The painter always fits the model to the widget first; this is layered over that result, so "zoom to extents" is simply a default-constructed viewport and no state has to be recomputed when the model changes.

Only the GEOMETRY is scaled — text keeps its point size, and dimension / leader offsets keep their pixel lengths. That is the engineering-drawing convention, and it is what makes zooming useful for legibility: the drawing spreads out underneath labels that stay readable, instead of everything growing together and staying equally cramped.

Member Function Documentation

◆ isIdentity()

bool openswmmvis::sectionview::DiagramViewport::isIdentity ( ) const

inline

Member Data Documentation

◆ panPx

QPointF openswmmvis::sectionview::DiagramViewport::panPx

Additional translation, in screen pixels.

◆ zoom

double openswmmvis::sectionview::DiagramViewport::zoom = 1.0

1.0 = fitted to the widget.

The documentation for this struct was generated from the following file:

/home/runner/work/openswmm.gui/openswmm.gui/include/ui/sectionview/sectiondiagram.h