e6e3cc82a0
Used QGesture for this as per the gesture example. Moved the help and info text to separate lines. Enabled word wrap to prevent text going off screen. As a drive-by, the code to center the window at a size that's a fraction of the screen is replaced with a simple sizeHint() override. The user should have control over placement, particularly now that it should be placed manually onto a touchscreen if the user has one. Done-with: Shawn Rutledge Fixes: QTBUG-96702 Change-Id: I8dba8b09bed474f585341e9a7a8c71fb60293eee Reviewed-by: Rami Potinkara <rami.potinkara@qt.io> Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io> (cherry picked from commit fc5482cac6e69364c9d09fb8d994065e2a5fb542) Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
// Copyright (C) 2021 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#ifndef MANDELBROTWIDGET_H
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#define MANDELBROTWIDGET_H
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#include <QGestureEvent>
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#include <QPixmap>
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#include <QWidget>
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#include "renderthread.h"
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//! [0]
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class MandelbrotWidget : public QWidget
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{
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Q_OBJECT
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public:
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MandelbrotWidget(QWidget *parent = nullptr);
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protected:
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QSize sizeHint() const override { return {1024, 768}; };
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void paintEvent(QPaintEvent *event) override;
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void resizeEvent(QResizeEvent *event) override;
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void keyPressEvent(QKeyEvent *event) override;
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#if QT_CONFIG(wheelevent)
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void wheelEvent(QWheelEvent *event) override;
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#endif
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void mousePressEvent(QMouseEvent *event) override;
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void mouseMoveEvent(QMouseEvent *event) override;
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void mouseReleaseEvent(QMouseEvent *event) override;
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#ifndef QT_NO_GESTURES
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bool event(QEvent *event) override;
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#endif
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private slots:
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void updatePixmap(const QImage &image, double scaleFactor);
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void zoom(double zoomFactor);
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private:
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void scroll(int deltaX, int deltaY);
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#ifndef QT_NO_GESTURES
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bool gestureEvent(QGestureEvent *event);
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#endif
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RenderThread thread;
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QPixmap pixmap;
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QPoint pixmapOffset;
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QPoint lastDragPos;
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QString help;
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QString info;
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double centerX;
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double centerY;
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double pixmapScale;
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double curScale;
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};
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//! [0]
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#endif // MANDELBROTWIDGET_H
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