donner::editor::ViewportInteractionController Class Reference

Owns viewport/input state for the render pane: zoom/pan, pending click dispatch, and frame timing history. More...

#include "donner/editor/ViewportInteractionController.h"

Public Member Functions
ViewportState &	viewport ()
const ViewportState &	viewport () const
FrameHistory &	frameHistory ()
const FrameHistory &	frameHistory () const
void	noteFrameDelta (float deltaMs)
void	updatePaneLayout (const Vector2d &paneOrigin, const Vector2d &paneSize, const std::optional< Box2d > &documentViewBox, bool preservePaneCenterDocumentPoint=false)
void	updateDevicePixelRatio (double devicePixelRatio)
bool	resetToActualSize ()
	Reset the viewport to 100%.
bool	applyZoom (double factor, const Vector2d &focalScreen)
	Apply a multiplicative zoom around a screen-space focal point.
bool	updatePanState (bool paneHovered, bool spaceHeld, bool middleDown, bool leftDown, const ImVec2 &mousePosition)
	Update mouse-drag pan state.
bool	panning () const
ScrollConsumptionResult	consumeScrollEvents (std::vector< RenderPaneScrollEvent > &events, const Box2d &paneRect, bool modalCapturingInput, double wheelZoomStep, double panPixelsPerScrollUnit)
	Consume queued trackpad/wheel events.
void	bufferPendingClick (const Vector2d &documentPoint, MouseModifiers modifiers)
const std::optional< PendingClick > &	pendingClick () const
void	clearPendingClick ()

Detailed Description

Owns viewport/input state for the render pane: zoom/pan, pending click dispatch, and frame timing history.

Member Function Documentation

applyZoom()

bool donner::editor::ViewportInteractionController::applyZoom ( double factor, const Vector2d & focalScreen )

nodiscard

Apply a multiplicative zoom around a screen-space focal point.

Parameters

factor	Zoom multiplier.
focalScreen	Screen-space point that remains anchored.

Returns

True if the viewport mapping changed.

consumeScrollEvents()

ScrollConsumptionResult donner::editor::ViewportInteractionController::consumeScrollEvents ( std::vector< RenderPaneScrollEvent > & events, const Box2d & paneRect, bool modalCapturingInput, double wheelZoomStep, double panPixelsPerScrollUnit )

nodiscard

Consume queued trackpad/wheel events.

Returns

Viewport mutation summary for the consumed events.

resetToActualSize()

bool donner::editor::ViewportInteractionController::resetToActualSize ( )

nodiscard

Reset the viewport to 100%.

Returns

True if the viewport mapping changed.

updatePanState()

bool donner::editor::ViewportInteractionController::updatePanState ( bool paneHovered, bool spaceHeld, bool middleDown, bool leftDown, const ImVec2 & mousePosition )

nodiscard

Update mouse-drag pan state.

Returns

True if the viewport mapping changed.

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

• donner/editor/ViewportInteractionController.h