Gary Wang
24a0b581f3
The required exiv2 version is now 0.28.x as well since it was keeped for Qt 5 build. Due to exiv2ConfigVersion.cmake doesn't allow us write something like find_package(exiv2 "0.28") to require version >= 0.28.0, we simply don't put the required version number here for now.
137 lines
4.0 KiB
C++
137 lines
4.0 KiB
C++
// SPDX-FileCopyrightText: 2022 Gary Wang <wzc782970009@gmail.com>
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// SPDX-FileCopyrightText: 2023 Tad Young <yyc12321@outlook.com>
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//
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// SPDX-License-Identifier: MIT
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#include "framelesswindow.h"
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#include <QMouseEvent>
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#include <QHoverEvent>
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#include <QApplication>
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#include <QVBoxLayout>
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#include <QWindow>
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FramelessWindow::FramelessWindow(QWidget *parent)
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: QWidget(parent)
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, m_centralLayout(new QVBoxLayout(this))
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, m_oldCursorShape(Qt::ArrowCursor)
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, m_oldEdges()
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{
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this->setWindowFlags(Qt::Window | Qt::FramelessWindowHint | Qt::WindowMinMaxButtonsHint);
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this->setMouseTracking(true);
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this->setAttribute(Qt::WA_Hover, true);
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this->installEventFilter(this);
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m_centralLayout->setContentsMargins(QMargins());
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}
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void FramelessWindow::setCentralWidget(QWidget *widget)
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{
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if (m_centralWidget) {
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m_centralLayout->removeWidget(m_centralWidget);
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m_centralWidget->deleteLater();
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}
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m_centralLayout->addWidget(widget);
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m_centralWidget = widget;
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}
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void FramelessWindow::installResizeCapture(QObject* widget)
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{
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widget->installEventFilter(this);
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}
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bool FramelessWindow::eventFilter(QObject* o, QEvent* e)
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{
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switch (e->type()) {
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case QEvent::HoverMove:
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{
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QWidget* wg = qobject_cast<QWidget*>(o);
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if (wg != nullptr)
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return mouseHover(static_cast<QHoverEvent*>(e), wg);
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break;
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}
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case QEvent::MouseButtonPress:
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return mousePress(static_cast<QMouseEvent*>(e));
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}
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return QWidget::eventFilter(o, e);
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}
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bool FramelessWindow::mouseHover(QHoverEvent* event, QWidget* wg)
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{
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if (!isMaximized() && !isFullScreen()) {
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QWindow* win = window()->windowHandle();
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Qt::Edges edges = this->getEdgesByPos(wg->mapToGlobal(event->oldPos()), win->frameGeometry());
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// backup & restore cursor shape
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if (edges && !m_oldEdges)
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// entering the edge. backup cursor shape
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m_oldCursorShape = win->cursor().shape();
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if (!edges && m_oldEdges)
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// leaving the edge. restore cursor shape
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win->setCursor(m_oldCursorShape);
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// save the latest edges status
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m_oldEdges = edges;
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// show resize cursor shape if cursor is within border
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if (edges) {
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win->setCursor(this->getCursorByEdge(edges, Qt::ArrowCursor));
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return true;
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}
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}
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return false;
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}
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bool FramelessWindow::mousePress(QMouseEvent* event)
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{
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if (event->buttons() & Qt::LeftButton && !isMaximized() && !isFullScreen()) {
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QWindow* win = window()->windowHandle();
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Qt::Edges edges = this->getEdgesByPos(event->globalPosition().toPoint(), win->frameGeometry());
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if (edges) {
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win->startSystemResize(edges);
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return true;
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}
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}
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return false;
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}
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Qt::CursorShape FramelessWindow::getCursorByEdge(const Qt::Edges& edges, Qt::CursorShape default_cursor)
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{
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if ((edges == (Qt::TopEdge | Qt::LeftEdge)) || (edges == (Qt::RightEdge | Qt::BottomEdge)))
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return Qt::SizeFDiagCursor;
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else if ((edges == (Qt::TopEdge | Qt::RightEdge)) || (edges == (Qt::LeftEdge | Qt::BottomEdge)))
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return Qt::SizeBDiagCursor;
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else if (edges & (Qt::TopEdge | Qt::BottomEdge))
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return Qt::SizeVerCursor;
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else if (edges & (Qt::LeftEdge | Qt::RightEdge))
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return Qt::SizeHorCursor;
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else
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return default_cursor;
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}
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Qt::Edges FramelessWindow::getEdgesByPos(const QPoint gpos, const QRect& winrect)
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{
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const int borderWidth = 8;
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Qt::Edges edges;
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int x = gpos.x() - winrect.x();
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int y = gpos.y() - winrect.y();
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if (x < borderWidth)
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edges |= Qt::LeftEdge;
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if (x > (winrect.width() - borderWidth))
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edges |= Qt::RightEdge;
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if (y < borderWidth)
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edges |= Qt::TopEdge;
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if (y > (winrect.height() - borderWidth))
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edges |= Qt::BottomEdge;
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return edges;
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}
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