mirror of
https://github.com/qelectrotech/qelectrotech-source-mirror.git
synced 2026-09-28 21:34:12 +02:00
Andre Rummler
6b577ee757
Shapes and images can now be resized, rotated, and skewed directly on the canvas, not just moved. Both share one small transform struct (rotation, then skew, then scale, anchored on a movable pivot) and one handle widget, so a corner drag, an edge skew, or grabbing the rotate handle behaves the same way and runs through the same matrix math everywhere, instead of every item type reinventing its own. Shapes also gained a proper pen tool (bezier paths, corner/smooth/ symmetric nodes), arc support, and mirroring. Images gained non-destructive cropping and colour-keyed transparency, both remember their own settings, so reopening the dialog picks up where you left off instead of starting over. Properties dialogs for both were extended to match (position, size, angle, skew), with undo/redo wired through for every handle drag. Old XML files can read easily as the transformation is only added if needed and the old syntax is still used and understood if it is not needed.
82 lines
3.2 KiB
C++
82 lines
3.2 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 DIAGRAMEVENTADDPATH_H
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#define DIAGRAMEVENTADDPATH_H
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#include "../qetgraphicsitem/qetshapeitem.h"
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#include "diagrameventinterface.h"
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class QGraphicsLineItem;
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/**
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@brief The DiagramEventAddPath class
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Pen tool: interactively draw a new Path (Bezier) shape, following the
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same vocabulary every vector editor's pen tool uses:
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- click places a Corner node;
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- press-drag-release places a Smooth node, with the drag defining a
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pair of mirrored handles (same convention as
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QetShapeItem::dragPathControlHandle's "Smooth" mirroring);
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- clicking back on the first node closes the path;
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- double-click, Enter, or Escape (once 2+ nodes exist) finishes it
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open;
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- right-click steps back one node;
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- right-click or Escape with nothing placed yet cancels the tool.
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While running, m_nodes always carries one extra "preview" node at the
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end, tracking the mouse so a live rubber-band segment is always
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visible -- confirmedNodeCount() excludes it; every public gesture
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handler is responsible for stripping it before treating the list as
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"the path so far" (see finishPath(), which does this once for every
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finishing gesture).
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*/
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class DiagramEventAddPath : public DiagramEventInterface
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{
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Q_OBJECT
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public:
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DiagramEventAddPath(Diagram *diagram);
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~DiagramEventAddPath() override;
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void mousePressEvent (QGraphicsSceneMouseEvent *event) override;
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void mouseMoveEvent (QGraphicsSceneMouseEvent *event) override;
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void mouseReleaseEvent (QGraphicsSceneMouseEvent *event) override;
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void mouseDoubleClickEvent (QGraphicsSceneMouseEvent *event) override;
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void keyPressEvent (QKeyEvent *event) override;
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void init() override;
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private:
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void updateHelpCross (const QPointF &p);
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void showHint () const;
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void finishPath (bool closed);
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void cancelPath ();
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bool nearFirstNode (const QPointF &scenePos) const;
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int confirmedNodeCount () const; // m_nodes always carries one trailing "preview" node while running; this excludes it
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QPointF snapped (const QPointF &scenePos, Qt::KeyboardModifiers mods) const;
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QetShapeItem *m_shape_item;
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QVector<QetShapeItem::PathNode> m_nodes;
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int m_dragging_node = -1;
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QGraphicsLineItem *m_help_horiz, *m_help_verti;
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// Scene units within which a click on an existing path is
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// treated as "on the first node" and closes the shape, rather
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// than adding yet another node right next to it.
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static constexpr qreal CLOSE_THRESHOLD = 12.0;
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};
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#endif // DIAGRAMEVENTADDPATH_H
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