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74 lines
3.4 KiB
C++
74 lines
3.4 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2022 Jon Beniston, M7RCE //
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// //
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// This program 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 as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program 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 V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef SDRGUI_FRAMELESSWINDOWRESIZER_H_
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#define SDRGUI_FRAMELESSWINDOWRESIZER_H_
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#include "export.h"
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#include <QEvent>
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#include <QMouseEvent>
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#include <QWidget>
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// Class to allow frameless windows (Qt::FramelessWindowHint) to be resized
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// by clicking and draging on the border
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// The window needs to forward the mousePressEvent, mouseReleaseEvent, mouseMoveEvent
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// and leaveEvent events to this class
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// Child widgets should have mouse tracking enabled, so cursor can be controlled properly
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// This can be achieved by calling enableChildMouseTracking
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class SDRGUI_API FramelessWindowResizer
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{
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private:
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QWidget *m_widget; // Widget to be resized
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bool m_vResizing; // Whether we are resizing vertically
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bool m_hResizing;
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bool m_vMove; // Whether we are moving vertically
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bool m_hMove;
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QPoint m_mouseOffsetToPos;// Offset from mouse position to top/left of window
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QPoint m_initialMousePos; // Position of mouse when resize started
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QRect m_initRect; // Dimensions of widget when resize started
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QPoint m_origBottomRight; // So we do not "push" the widget when resizing from top or left
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const QCursor *m_cursor; // Current cursor
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const QCursor m_vCursor; // Ideally static, but when run:
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const QCursor m_hCursor; // QPixmap: Must construct a QGuiApplication before a QPixmap
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const QCursor m_bCursor;
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const QCursor m_fCursor;
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public:
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FramelessWindowResizer(QWidget *widget);
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void enableChildMouseTracking();
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void mousePressEvent(QMouseEvent* event);
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void mouseReleaseEvent(QMouseEvent* event);
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void mouseMoveEvent(QMouseEvent* event);
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void leaveEvent(QEvent* event);
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const int m_gripSize = 2; // Size in pixels of the border of the window that can be clicked in to resize it
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protected:
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bool mouseOnTopBorder(QPoint pos) const;
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bool mouseOnBottomBorder(QPoint pos) const;
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bool mouseOnLeftBorder(QPoint pos) const;
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bool mouseOnRightBorder(QPoint pos) const;
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bool mouseOnBorder(QPoint pos) const;
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void setCursor(const QCursor &cursor);
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void clearCursor();
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};
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#endif // SDRGUI_FRAMELESSWINDOWRESIZER_H_
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