mirror of
https://github.com/f4exb/sdrangel.git
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281 lines
8.9 KiB
C++
281 lines
8.9 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2022-2023 Jon Beniston, M7RCE <jon@beniston.com> //
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// Copyright (C) 2022 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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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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#include <QGuiApplication>
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#include <QLayout>
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#include <QTableWidget>
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#include "framelesswindowresizer.h"
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FramelessWindowResizer::FramelessWindowResizer(QWidget *widget) :
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m_widget(widget),
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m_vResizing(false),
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m_hResizing(false),
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m_vMove(false),
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m_hMove(false),
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m_cursor(nullptr),
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m_vCursor(Qt::SizeVerCursor),
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m_hCursor(Qt::SizeHorCursor),
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m_bCursor(Qt::SizeBDiagCursor),
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m_fCursor(Qt::SizeFDiagCursor)
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{
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}
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void FramelessWindowResizer::enableChildMouseTracking()
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{
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QList<QWidget *> widgets = m_widget->findChildren<QWidget *>();
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for (auto widget : widgets) {
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widget->setMouseTracking(true);
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}
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// QTableWidgets don't send us mouseMoveEvents for some unknown reason
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// so install an event filter on their viewport
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QList<QTableWidget *> tables = m_widget->findChildren<QTableWidget *>();
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for (auto table : tables)
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{
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table->viewport()->setMouseTracking(true);
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table->viewport()->installEventFilter(this);
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}
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}
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bool FramelessWindowResizer::mouseOnTopBorder(QPoint pos) const
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{
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return ((pos.y() >= 0) && (pos.y() < m_gripSize)
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&& (m_widget->sizePolicy().verticalPolicy() != QSizePolicy::Fixed));
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}
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bool FramelessWindowResizer::mouseOnBottomBorder(QPoint pos) const
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{
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return ((pos.y() > m_widget->height() - 1 - m_gripSize) && (pos.y() < m_widget->height())
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&& (m_widget->sizePolicy().verticalPolicy() != QSizePolicy::Fixed));
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}
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bool FramelessWindowResizer::mouseOnLeftBorder(QPoint pos) const
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{
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return ((pos.x() >= 0) && (pos.x() < m_gripSize)
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&& (m_widget->sizePolicy().horizontalPolicy() != QSizePolicy::Fixed));
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}
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bool FramelessWindowResizer::mouseOnRightBorder(QPoint pos) const
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{
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return ((pos.x() > m_widget->width() - 1 - m_gripSize) && (pos.x() < m_widget->width())
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&& (m_widget->sizePolicy().horizontalPolicy() != QSizePolicy::Fixed));
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}
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bool FramelessWindowResizer::mouseOnBorder(QPoint pos) const
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{
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return mouseOnTopBorder(pos) || mouseOnBottomBorder(pos)
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|| mouseOnLeftBorder(pos) || mouseOnRightBorder(pos);
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}
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void FramelessWindowResizer::setCursor(const QCursor &cursor)
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{
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if (m_cursor != &cursor)
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{
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if (m_cursor != nullptr) {
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QGuiApplication::restoreOverrideCursor();
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}
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QGuiApplication::setOverrideCursor(cursor);
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m_cursor = &cursor;
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}
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}
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void FramelessWindowResizer::clearCursor()
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{
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if (m_cursor)
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{
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QGuiApplication::restoreOverrideCursor();
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m_cursor = nullptr;
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}
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}
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void FramelessWindowResizer::mousePressEvent(QMouseEvent* event)
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{
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if ((event->buttons() & Qt::LeftButton) && mouseOnBorder(event->pos()))
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{
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if (mouseOnTopBorder(event->pos()) || mouseOnBottomBorder(event->pos())) {
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m_vResizing = true;
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}
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if (mouseOnLeftBorder(event->pos()) || mouseOnRightBorder(event->pos())) {
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m_hResizing = true;
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}
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if (mouseOnTopBorder(event->pos()))
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{
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m_vMove = true;
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// Calculate difference between mouse position and top left corner of widget
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m_mouseOffsetToPos = event->globalPos() - m_widget->pos();
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}
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if (mouseOnLeftBorder(event->pos()))
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{
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m_hMove = true;
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m_mouseOffsetToPos = event->globalPos() - m_widget->pos();
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}
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// Save coords of bottom/right of widget
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m_origBottomRight.setX(m_widget->pos().x() + m_widget->width());
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m_origBottomRight.setY(m_widget->pos().y() + m_widget->height());
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m_initialMousePos = event->globalPos();
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m_initRect = m_widget->rect();
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event->accept();
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}
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}
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void FramelessWindowResizer::mouseReleaseEvent(QMouseEvent* event)
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{
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if (!(event->buttons() & Qt::LeftButton))
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{
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m_vResizing = false;
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m_hResizing = false;
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m_vMove = false;
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m_hMove = false;
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}
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}
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void FramelessWindowResizer::leaveEvent(QEvent*)
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{
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clearCursor();
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}
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bool FramelessWindowResizer::eventFilter(QObject *obj, QEvent *event)
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{
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if (event->type() == QEvent::MouseMove)
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{
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// Mouse moving over child table widget
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clearCursor();
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}
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return QObject::eventFilter(obj, event);
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}
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void FramelessWindowResizer::mouseMoveEvent(QMouseEvent* event)
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{
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if (m_vResizing || m_hResizing)
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{
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int x, y;
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// Calculate resize requested
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int w = m_initRect.width();
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int h = m_initRect.height();
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QPoint delta = event->globalPos() - m_initialMousePos;
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x = delta.x();
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y = delta.y();
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if (m_hMove) {
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x = -x;
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}
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if (m_vMove) {
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y = -y;
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}
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if (m_hResizing) {
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w += x;
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}
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if (m_vResizing) {
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h += y;
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}
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QSize reqSize(w, h);
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// Get min and max size we can resize to
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QSize minSize, maxSize;
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if (m_widget->layout())
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{
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//minSize = m_widget->layout()->minimumSize();
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maxSize = m_widget->layout()->maximumSize();
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}
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else
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{
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//minSize = m_widget->minimumSize();
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maxSize = m_widget->maximumSize();
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}
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minSize = m_widget->minimumSizeHint(); // Need to use minimumSizeHint for FlowLayout to work
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// Limit requested to size to allowed min/max
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QSize size = reqSize;
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size = size.expandedTo(minSize);
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size = size.boundedTo(maxSize);
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// Prevent vertical expansion of vertically fixed widgets
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if (m_widget->sizePolicy().verticalPolicy() == QSizePolicy::Fixed) {
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size.setHeight(m_widget->sizeHint().height());
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}
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// Prevent horizontal expansion of horizontal fixed widgets
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if (m_widget->sizePolicy().horizontalPolicy() == QSizePolicy::Fixed) {
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size.setWidth(m_widget->sizeHint().width());
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}
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// Move
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if (m_vMove || m_hMove)
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{
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if (m_hMove)
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{
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x = event->globalPos().x() - m_mouseOffsetToPos.x();
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if (x + minSize.width() > m_origBottomRight.x()) {
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x = m_origBottomRight.x() - minSize.width();
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}
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}
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else
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{
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x = m_widget->pos().x();
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}
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if (m_vMove)
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{
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y = event->globalPos().y() - m_mouseOffsetToPos.y();
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if (y + minSize.height() > m_origBottomRight.y()) {
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y = m_origBottomRight.y() - minSize.height();
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}
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}
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else
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{
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y = m_widget->pos().y();
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}
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m_widget->move(x, y);
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}
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m_widget->resize(size);
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event->accept();
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}
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else
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{
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QPoint pos = event->pos();
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if (mouseOnBorder(pos))
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{
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// Set cursor according to edge or corner mouse is over
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if (mouseOnTopBorder(pos) && mouseOnRightBorder(pos)) {
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setCursor(m_bCursor);
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} else if (mouseOnTopBorder(pos) && mouseOnLeftBorder(pos)) {
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setCursor(m_fCursor);
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} else if (mouseOnBottomBorder(pos) && mouseOnRightBorder(pos)) {
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setCursor(m_fCursor);
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} else if (mouseOnBottomBorder(pos) && mouseOnLeftBorder(pos)) {
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setCursor(m_bCursor);
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} else if (mouseOnTopBorder(pos) || mouseOnBottomBorder(pos)) {
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setCursor(m_vCursor);
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} else if (mouseOnLeftBorder(pos) || mouseOnRightBorder(pos)) {
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setCursor(m_hCursor);
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}
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}
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else
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{
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clearCursor();
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}
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}
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}
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