Internal
Public Access
ksmithandClaude Sonnet 5
9dd1af21d6
Implements RFB's Cursor pseudo-encoding (RFC 6143 SS7.8.2, type -239): a FramebufferUpdate rectangle carrying a cursor shape instead of screen content (x/y are the hotspot, not position; width/height are the cursor image size), decoded into an ARGB32 QImage using the rectangle's RGB pixel data plus its opacity bitmask, then never painted into the framebuffer. A 0x0 rectangle means "hide the cursor" per spec. VncDisplayWidget gains RdpDisplayWidget's setCursorImage/Hidden/ Default() + applyCursor() shape, reusing its own renderRect()/ effectiveRemoteSize() so cursor scaling works correctly in both the scale-to-fit and actual-size display modes with no special-casing. VNC never emits cursorReset() (RFB's Cursor pseudo-encoding has no "reset to system default" signal, unlike RDP's SetDefault callback) -- setCursorDefault() exists for symmetry but is unused today. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
#ifndef ORBITHUB_VNC_DISPLAY_WIDGET_H
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#define ORBITHUB_VNC_DISPLAY_WIDGET_H
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#include <QImage>
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#include <QPoint>
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#include <QWidget>
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class QKeyEvent;
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class QMouseEvent;
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class QPaintEvent;
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class QResizeEvent;
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class QTimer;
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class QWheelEvent;
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// Renders a VNC framebuffer and forwards local input, scaled-to-fit --
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// same shape as RdpDisplayWidget, including remote cursor-shape sync.
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class VncDisplayWidget : public QWidget
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{
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Q_OBJECT
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public:
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explicit VncDisplayWidget(QWidget* parent = nullptr);
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void setFrame(const QImage& frame);
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void setRemoteDesktopSize(int width, int height);
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void clearFrame();
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// true (default): scale the whole remote screen to fit the widget,
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// like RdpDisplayWidget. false: render at the remote's actual pixel
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// size -- meant to be placed inside a QScrollArea, whose scrollbars
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// then let the user pan around a screen larger than the window
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// instead of shrinking small text to illegibility. VNC has no
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// equivalent of RDP's MS-RDPEDISP to request a different resolution
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// from the guest, so this is the only way to see it at native size.
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void setScaleToFit(bool scaleToFit);
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bool scaleToFit() const
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{
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return m_scaleToFit;
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}
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// Mirrors RdpDisplayWidget's cursor handling. VNC's Cursor pseudo-
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// encoding never signals "reset to default" the way RDP's SetDefault
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// callback does -- it only ever supplies a shape or hides the cursor --
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// so setCursorDefault() exists for symmetry/future use but VNC sessions
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// never call it today.
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void setCursorImage(const QImage& image, const QPoint& hotspot);
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void setCursorHidden();
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void setCursorDefault();
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signals:
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void keyInput(int key, quint32 nativeScanCode, const QString& text, bool pressed, int modifiers);
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void mouseMoveInput(int x, int y);
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void mouseButtonInput(int x, int y, int button, bool pressed);
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void mouseWheelInput(int x, int y, int deltaX, int deltaY);
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void viewportSizeChanged(int width, int height);
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void displayScaleChanged(qreal devicePixelRatio);
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protected:
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void paintEvent(QPaintEvent* event) override;
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void resizeEvent(QResizeEvent* event) override;
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bool event(QEvent* event) override;
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void keyPressEvent(QKeyEvent* event) override;
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void keyReleaseEvent(QKeyEvent* event) override;
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void mousePressEvent(QMouseEvent* event) override;
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void mouseReleaseEvent(QMouseEvent* event) override;
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void mouseMoveEvent(QMouseEvent* event) override;
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void wheelEvent(QWheelEvent* event) override;
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bool focusNextPrevChild(bool next) override;
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private:
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enum class CursorMode {
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Default,
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Hidden,
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Custom,
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};
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QImage m_frame;
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QSize m_remoteSize;
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QTimer* m_resizeDebounceTimer;
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bool m_scaleToFit;
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QImage m_cursorImage;
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QPoint m_cursorHotspot;
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CursorMode m_cursorMode;
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QRectF renderRect() const;
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QPoint mapToRemote(const QPointF& pos) const;
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QSize effectiveRemoteSize() const;
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void emitViewportGeometry();
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void scheduleViewportGeometryEmit();
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void applySizeConstraint();
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void applyCursor();
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};
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#endif
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