Owns the waveform table's zoom state and the math that maps it to view metrics. More...

#include <DolphinZoom.h>

Public Member Functions
void	apply () const
	Applies the current zoom to the view's row/column section sizes and font.
bool	canZoomIn () const
	True if Zoom In is still possible (below the max level).
bool	canZoomOut () const
	True if Zoom Out is still possible (above the baseline).
	DolphinZoom (QTableView *view)
	Constructs the zoom controller for view (not owned; must outlive this).
double	fitScale () const
	Current uniform Fit Screen scale.
void	fitScreen ()
void	reset ()
	Resets both axes to the baseline (level 0, scale 1.0) and re-applies.
void	zoomIn ()
	Increases the discrete column-zoom one step (capped) and re-applies.
int	zoomLevel () const
	Current discrete column-zoom level.
void	zoomOut ()
	Decreases the discrete column-zoom one step (floored at the baseline) and re-applies.

Detailed Description

Owns the waveform table's zoom state and the math that maps it to view metrics.

Two independent axes: a discrete column-zoom level (Zoom In/Out/Reset) that widens columns only — a horizontal "time stretch" — and a uniform Fit Screen scale that scales columns, rows, and font together. Holds a non-owning pointer to the table view and resizes its Fixed-mode header sections + font on apply(). The controller keeps the UI glue (sentry breadcrumbs, guarded slots, action enable-state, the wheel event filter).

Definition at line 22 of file DolphinZoom.h.

Constructor & Destructor Documentation

◆ DolphinZoom()

DolphinZoom::DolphinZoom ( QTableView * view )

explicit

Constructs the zoom controller for view (not owned; must outlive this).

Definition at line 24 of file DolphinZoom.cpp.

Member Function Documentation

◆ apply()

void DolphinZoom::apply ( ) const

Applies the current zoom to the view's row/column section sizes and font.

Definition at line 112 of file DolphinZoom.cpp.

References kDefaultColumnWidth, kDefaultRowHeight, and kZoomStep.

Referenced by fitScreen(), reset(), zoomIn(), and zoomOut().

◆ canZoomIn()

bool DolphinZoom::canZoomIn ( ) const

True if Zoom In is still possible (below the max level).

Definition at line 29 of file DolphinZoom.cpp.

References kMaxZoomLevel.

◆ canZoomOut()

bool DolphinZoom::canZoomOut ( ) const

True if Zoom Out is still possible (above the baseline).

Definition at line 34 of file DolphinZoom.cpp.

◆ fitScale()

double DolphinZoom::fitScale ( ) const

inline

Current uniform Fit Screen scale.

Definition at line 43 of file DolphinZoom.h.

◆ fitScreen()

void DolphinZoom::fitScreen ( )

Computes a uniform scale that fits the content in the viewport and re-applies. On degenerate geometry (empty/hidden table) it leaves the zoom untouched.

Definition at line 64 of file DolphinZoom.cpp.

References apply(), kDefaultColumnWidth, kDefaultRowHeight, kFitEpsilon, kFitIterations, kMaxFitScale, and kMinFitScale.

◆ reset()

void DolphinZoom::reset ( )

Resets both axes to the baseline (level 0, scale 1.0) and re-applies.

Definition at line 57 of file DolphinZoom.cpp.

References apply().

◆ zoomIn()

void DolphinZoom::zoomIn ( )

Increases the discrete column-zoom one step (capped) and re-applies.

Definition at line 39 of file DolphinZoom.cpp.

References apply(), and kMaxZoomLevel.

◆ zoomLevel()

int DolphinZoom::zoomLevel ( ) const

inline

Current discrete column-zoom level.

Definition at line 41 of file DolphinZoom.h.

◆ zoomOut()

void DolphinZoom::zoomOut ( )

Decreases the discrete column-zoom one step (floored at the baseline) and re-applies.

Definition at line 48 of file DolphinZoom.cpp.