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ispyisail
d9db6e59e7
Tab cycles the folio's items, which means focusNextPrevChild() has to refuse the usual focus traversal. On its own that leaves someone working without a mouse able to reach the drawing area and never leave it -- the exact person the Tab cycling was added for. Escape now steps back out in two stages: it drops the selection first, then hands focus to the next widget. The one-shot m_releasing_focus flag is what lets that second Escape through the override. Verified under Xvfb: with an item selected, Escape clears it (193k pixels change); a second Escape changes nothing visually; a Tab after that moves widget focus in the toolbar (306 pixels) instead of selecting on the canvas, which is the behaviour of a view that no longer holds focus. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
149 lines
4.8 KiB
C++
149 lines
4.8 KiB
C++
/*
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Copyright 2006-2026 The QElectroTech Team
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This file is part of QElectroTech.
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QElectroTech is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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QElectroTech is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with QElectroTech. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DIAGRAMVIEW_H
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#define DIAGRAMVIEW_H
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#include "../ElementsCollection/elementslocation.h"
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#include "titleblock/templatelocation.h"
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#include <QClipboard>
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#include <QGraphicsView>
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class Conductor;
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class Diagram;
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class QETDiagramEditor;
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class DVEventInterface;
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class QInputEvent;
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class QGestureEvent;
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/**
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This class provides a widget to render an electric diagram in an editable,
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interactive way.
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*/
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class DiagramView : public QGraphicsView
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{
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Q_OBJECT
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// constructors, destructor
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public:
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DiagramView(Diagram *diagram, QWidget * = nullptr);
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~DiagramView() override;
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private:
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DiagramView(const DiagramView &);
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// attributes
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Diagram *m_diagram = nullptr;
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DVEventInterface *m_event_interface = nullptr;
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QAction *m_paste_here = nullptr;
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QAction *m_multi_paste = nullptr;
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QAction *m_create_template = nullptr;
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QPoint m_paste_here_pos;
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QPointF m_drag_last_pos;
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bool m_fresh_focus_in,
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m_first_activation = true;
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QList<QAction *> m_separators;
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QPolygonF m_free_rubberband;
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bool m_free_rubberbanding = false;
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public:
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QString title() const;
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void editDiagramProperties();
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Diagram *diagram() { return(m_diagram); }
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QETDiagramEditor *diagramEditor() const;
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void editSelection();
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void setEventInterface (DVEventInterface *event_interface);
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QList<QAction *> contextMenuActions() const;
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protected:
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void mouseDoubleClickEvent(QMouseEvent *) override;
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void contextMenuEvent(QContextMenuEvent *) override;
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void wheelEvent(QWheelEvent *) override;
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void focusInEvent(QFocusEvent *) override;
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void keyPressEvent(QKeyEvent *) override;
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void keyReleaseEvent(QKeyEvent *) override;
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bool event(QEvent *) override;
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bool focusNextPrevChild(bool next) override;
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///Set for one call only, by the Escape handler, to let focus leave the view.
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bool m_releasing_focus = false;
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void paintEvent(QPaintEvent *event) override;
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void mousePressEvent(QMouseEvent *) override;
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void mouseMoveEvent(QMouseEvent *) override;
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void mouseReleaseEvent(QMouseEvent *) override;
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void dragEnterEvent(QDragEnterEvent *) override;
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void dragMoveEvent(QDragMoveEvent *) override;
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void dropEvent(QDropEvent *) override;
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virtual bool switchToVisualisationModeIfNeeded(QInputEvent *e);
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virtual bool switchToSelectionModeIfNeeded(QInputEvent *e);
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virtual bool isCtrlShifting(QInputEvent *);
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virtual bool selectedItemHasFocus();
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private:
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void handleElementDrop(QDropEvent *);
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void handleTitleBlockDrop(QDropEvent *);
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void handleTextDrop(QDropEvent *);
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void scrollOnMovement(QKeyEvent *);
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bool gestureEvent(QGestureEvent *event);
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QRectF viewedSceneRect() const;
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bool mustIntegrateTitleBlockTemplate(const TitleBlockTemplateLocation &) const;
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bool gestures() const;
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/// Lowest and highest allowed value of the view transform scale (m11).
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/// Prevents wheel-zoom from driving the transform to overflow, which
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/// crashes the editor (see GitHub issue #798, same class of bug).
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static constexpr qreal m_min_zoom = 0.01;
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static constexpr qreal m_max_zoom = 200.0;
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signals:
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/// Signal emitted after the selection mode changed
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void modeChanged();
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/// Signal emitted after the diagram title changed
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void titleChanged(DiagramView *, const QString &);
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/// Signal emitted when users wish to locate an element from the diagram within elements collection
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void findElementRequired(const ElementsLocation &);
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/// Signal emitted when diagram must be show
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void showDiagram (Diagram *);
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/// Signal emitted when free rubberband changed.
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/// When free rubberband selection ends this signal will be emitted with null value.
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void freeRubberBandChanged(QPolygonF polygon);
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public slots:
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void setVisualisationMode();
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void setSelectionMode();
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void zoom(const qreal zoom_factor);
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void zoomFit();
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void zoomContent();
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void zoomReset();
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void cut();
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void copy();
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void paste(const QPointF & = QPointF(), QClipboard::Mode = QClipboard::Clipboard);
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void pasteHere();
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void adjustSceneRect();
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void updateWindowTitle();
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void resetConductors();
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private slots:
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void adjustGridToZoom();
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void applyReadOnly();
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void createTemplateFromSelection();
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};
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#endif
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