qt-everywhere-src-5.14.1/qtwayland/examples/wayland/qwindow-compositor/window.cpp - orbit - Git at Google

 /****************************************************************************
 **
 ** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Wayland module
 **
 ** $QT_BEGIN_LICENSE:BSD$
 ** Commercial License Usage
 ** Licensees holding valid commercial Qt licenses may use this file in
 ** accordance with the commercial license agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and The Qt Company. For licensing terms
 ** and conditions see https://www.qt.io/terms-conditions. For further
 ** information use the contact form at https://www.qt.io/contact-us.
 **
 ** BSD License Usage
 ** Alternatively, you may use this file under the terms of the BSD license
 ** as follows:
 **
 ** "Redistribution and use in source and binary forms, with or without
 ** modification, are permitted provided that the following conditions are
 ** met:
 **   * Redistributions of source code must retain the above copyright
 **     notice, this list of conditions and the following disclaimer.
 **   * Redistributions in binary form must reproduce the above copyright
 **     notice, this list of conditions and the following disclaimer in
 **     the documentation and/or other materials provided with the
 **     distribution.
 **   * Neither the name of The Qt Company Ltd nor the names of its
 **     contributors may be used to endorse or promote products derived
 **     from this software without specific prior written permission.
 **
 **
 ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
 **
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include "window.h"

 #include <QMouseEvent>
 #include <QOpenGLWindow>
 #include <QOpenGLTexture>
 #include <QOpenGLFunctions>
 #include <QMatrix4x4>

 #include "compositor.h"
 #include <QtWaylandCompositor/qwaylandseat.h>

 Window::Window()
 {
 }

 void Window::setCompositor(Compositor *comp) {
     m_compositor = comp;
     connect(m_compositor, &Compositor::startMove, this, &Window::startMove);
     connect(m_compositor, &Compositor::startResize, this, &Window::startResize);
     connect(m_compositor, &Compositor::dragStarted, this, &Window::startDrag);
 }

 void Window::initializeGL()
 {
     QImage backgroundImage = QImage(QLatin1String(":/background.jpg")).rgbSwapped();
     backgroundImage.invertPixels();
     m_backgroundTexture = new QOpenGLTexture(backgroundImage, QOpenGLTexture::DontGenerateMipMaps);
     m_backgroundTexture->setMinificationFilter(QOpenGLTexture::Nearest);
     m_backgroundImageSize = backgroundImage.size();
     m_textureBlitter.create();
     m_compositor->create(); // the compositor's hardware integration may depend on GL
 }

 void Window::drawBackground()
 {
     for (int y = 0; y < height(); y += m_backgroundImageSize.height()) {
         for (int x = 0; x < width(); x += m_backgroundImageSize.width()) {
             QMatrix4x4 targetTransform = QOpenGLTextureBlitter::targetTransform(QRect(QPoint(x,y), m_backgroundImageSize), QRect(QPoint(0,0), size()));
             m_textureBlitter.blit(m_backgroundTexture->textureId(),
                               targetTransform,
                               QOpenGLTextureBlitter::OriginTopLeft);
         }
     }
 }

 QPointF Window::getAnchorPosition(const QPointF &position, int resizeEdge, const QSize &windowSize)
 {
     float y = position.y();
     if (resizeEdge & QWaylandXdgSurfaceV5::ResizeEdge::TopEdge)
         y += windowSize.height();

     float x = position.x();
     if (resizeEdge & QWaylandXdgSurfaceV5::ResizeEdge::LeftEdge)
         x += windowSize.width();

     return QPointF(x, y);
 }

 QPointF Window::getAnchoredPosition(const QPointF &anchorPosition, int resizeEdge, const QSize &windowSize)
 {
     return anchorPosition - getAnchorPosition(QPointF(), resizeEdge, windowSize);
 }

 void Window::paintGL()
 {
     m_compositor->startRender();
     QOpenGLFunctions *functions = context()->functions();
     functions->glClearColor(1.f, .6f, .0f, 0.5f);
     functions->glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

     m_textureBlitter.bind();
     drawBackground();

     functions->glEnable(GL_BLEND);
     functions->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

     GLenum currentTarget = GL_TEXTURE_2D;
     const auto views = m_compositor->views();
     for (View *view : views) {
         if (view->isCursor())
             continue;
         auto texture = view->getTexture();
         if (!texture)
             continue;
         if (texture->target() != currentTarget) {
             currentTarget = texture->target();
             m_textureBlitter.bind(currentTarget);
         }
         QWaylandSurface *surface = view->surface();
         if ((surface && surface->hasContent()) || view->isBufferLocked()) {
             QSize s = view->size();
             if (!s.isEmpty()) {
                 if (m_mouseView == view && m_grabState == ResizeGrab && m_resizeAnchored)
                     view->setPosition(getAnchoredPosition(m_resizeAnchorPosition, m_resizeEdge, s));
                 QPointF pos = view->position() + view->parentPosition();
                 QRectF surfaceGeometry(pos, s);
                 auto surfaceOrigin = view->textureOrigin();
                 auto sf = view->animationFactor();
                 QRectF targetRect(surfaceGeometry.topLeft() * sf, surfaceGeometry.size() * sf);
                 QMatrix4x4 targetTransform = QOpenGLTextureBlitter::targetTransform(targetRect, QRect(QPoint(), size()));
                 m_textureBlitter.blit(texture->textureId(), targetTransform, surfaceOrigin);
             }
         }
     }
     functions->glDisable(GL_BLEND);

     m_textureBlitter.release();
     m_compositor->endRender();
 }

 View *Window::viewAt(const QPointF &point)
 {
     View *ret = nullptr;
     const auto views = m_compositor->views();
     for (View *view : views) {
         if (view == m_dragIconView)
             continue;
         QRectF geom(view->position(), view->size());
         if (geom.contains(point))
             ret = view;
     }
     return ret;
 }

 void Window::startMove()
 {
     m_grabState = MoveGrab;
 }

 void Window::startResize(int edge, bool anchored)
 {
     m_initialSize = m_mouseView->windowSize();
     m_grabState = ResizeGrab;
     m_resizeEdge = edge;
     m_resizeAnchored = anchored;
     m_resizeAnchorPosition = getAnchorPosition(m_mouseView->position(), edge, m_mouseView->surface()->destinationSize());
 }

 void Window::startDrag(View *dragIcon)
 {
     m_grabState = DragGrab;
     m_dragIconView = dragIcon;
     m_compositor->raise(dragIcon);
 }

 void Window::mousePressEvent(QMouseEvent *e)
 {
     if (mouseGrab())
         return;
     if (m_mouseView.isNull()) {
         m_mouseView = viewAt(e->localPos());
         if (!m_mouseView) {
             m_compositor->closePopups();
             return;
         }
         if (e->modifiers() == Qt::AltModifier || e->modifiers() == Qt::MetaModifier)
             m_grabState = MoveGrab; //start move
         else
             m_compositor->raise(m_mouseView);
         m_initialMousePos = e->localPos();
         m_mouseOffset = e->localPos() - m_mouseView->position();

         QMouseEvent moveEvent(QEvent::MouseMove, e->localPos(), e->globalPos(), Qt::NoButton, Qt::NoButton, e->modifiers());
         sendMouseEvent(&moveEvent, m_mouseView);
     }
     sendMouseEvent(e, m_mouseView);
 }

 void Window::mouseReleaseEvent(QMouseEvent *e)
 {
     if (!mouseGrab())
         sendMouseEvent(e, m_mouseView);
     if (e->buttons() == Qt::NoButton) {
         if (m_grabState == DragGrab) {
             View *view = viewAt(e->localPos());
             m_compositor->handleDrag(view, e);
         }
         m_mouseView = nullptr;
         m_grabState = NoGrab;
     }
 }

 void Window::mouseMoveEvent(QMouseEvent *e)
 {
     switch (m_grabState) {
     case NoGrab: {
         View *view = m_mouseView ? m_mouseView.data() : viewAt(e->localPos());
         sendMouseEvent(e, view);
         if (!view)
             setCursor(Qt::ArrowCursor);
     }
         break;
     case MoveGrab: {
         m_mouseView->setPosition(e->localPos() - m_mouseOffset);
         update();
     }
         break;
     case ResizeGrab: {
         QPoint delta = (e->localPos() - m_initialMousePos).toPoint();
         m_compositor->handleResize(m_mouseView, m_initialSize, delta, m_resizeEdge);
     }
         break;
     case DragGrab: {
         View *view = viewAt(e->localPos());
         m_compositor->handleDrag(view, e);
         if (m_dragIconView) {
             m_dragIconView->setPosition(e->localPos() + m_dragIconView->offset());
             update();
         }
     }
         break;
     }
 }

 void Window::sendMouseEvent(QMouseEvent *e, View *target)
 {
     QPointF mappedPos = e->localPos();
     if (target)
         mappedPos -= target->position();
     QMouseEvent viewEvent(e->type(), mappedPos, e->localPos(), e->button(), e->buttons(), e->modifiers());
     m_compositor->handleMouseEvent(target, &viewEvent);
 }

 void Window::keyPressEvent(QKeyEvent *e)
 {
     m_compositor->defaultSeat()->sendKeyPressEvent(e->nativeScanCode());
 }

 void Window::keyReleaseEvent(QKeyEvent *e)
 {
     m_compositor->defaultSeat()->sendKeyReleaseEvent(e->nativeScanCode());
 }
	/****************************************************************************
	**
	** Copyright (C) 2017 The Qt Company Ltd.
	** Contact: https://www.qt.io/licensing/
	**
	** This file is part of the examples of the Qt Wayland module
	**
	** $QT_BEGIN_LICENSE:BSD$
	** Commercial License Usage
	** Licensees holding valid commercial Qt licenses may use this file in
	** accordance with the commercial license agreement provided with the
	** Software or, alternatively, in accordance with the terms contained in
	** a written agreement between you and The Qt Company. For licensing terms
	** and conditions see https://www.qt.io/terms-conditions. For further
	** information use the contact form at https://www.qt.io/contact-us.
	**
	** BSD License Usage
	** Alternatively, you may use this file under the terms of the BSD license
	** as follows:
	**
	** "Redistribution and use in source and binary forms, with or without
	** modification, are permitted provided that the following conditions are
	** met:
	** * Redistributions of source code must retain the above copyright
	** notice, this list of conditions and the following disclaimer.
	** * Redistributions in binary form must reproduce the above copyright
	** notice, this list of conditions and the following disclaimer in
	** the documentation and/or other materials provided with the
	** distribution.
	** * Neither the name of The Qt Company Ltd nor the names of its
	** contributors may be used to endorse or promote products derived
	** from this software without specific prior written permission.
	**
	**
	** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
	** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
	** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
	**
	** $QT_END_LICENSE$
	**
	****************************************************************************/

	#include "window.h"

	#include <QMouseEvent>
	#include <QOpenGLWindow>
	#include <QOpenGLTexture>
	#include <QOpenGLFunctions>
	#include <QMatrix4x4>

	#include "compositor.h"
	#include <QtWaylandCompositor/qwaylandseat.h>

	Window::Window()
	{
	}

	void Window::setCompositor(Compositor *comp) {
	m_compositor = comp;
	connect(m_compositor, &Compositor::startMove, this, &Window::startMove);
	connect(m_compositor, &Compositor::startResize, this, &Window::startResize);
	connect(m_compositor, &Compositor::dragStarted, this, &Window::startDrag);
	}

	void Window::initializeGL()
	{
	QImage backgroundImage = QImage(QLatin1String(":/background.jpg")).rgbSwapped();
	backgroundImage.invertPixels();
	m_backgroundTexture = new QOpenGLTexture(backgroundImage, QOpenGLTexture::DontGenerateMipMaps);
	m_backgroundTexture->setMinificationFilter(QOpenGLTexture::Nearest);
	m_backgroundImageSize = backgroundImage.size();
	m_textureBlitter.create();
	m_compositor->create(); // the compositor's hardware integration may depend on GL
	}

	void Window::drawBackground()
	{
	for (int y = 0; y < height(); y += m_backgroundImageSize.height()) {
	for (int x = 0; x < width(); x += m_backgroundImageSize.width()) {
	QMatrix4x4 targetTransform = QOpenGLTextureBlitter::targetTransform(QRect(QPoint(x,y), m_backgroundImageSize), QRect(QPoint(0,0), size()));
	m_textureBlitter.blit(m_backgroundTexture->textureId(),
	targetTransform,
	QOpenGLTextureBlitter::OriginTopLeft);
	}
	}
	}

	QPointF Window::getAnchorPosition(const QPointF &position, int resizeEdge, const QSize &windowSize)
	{
	float y = position.y();
	if (resizeEdge & QWaylandXdgSurfaceV5::ResizeEdge::TopEdge)
	y += windowSize.height();

	float x = position.x();
	if (resizeEdge & QWaylandXdgSurfaceV5::ResizeEdge::LeftEdge)
	x += windowSize.width();

	return QPointF(x, y);
	}

	QPointF Window::getAnchoredPosition(const QPointF &anchorPosition, int resizeEdge, const QSize &windowSize)
	{
	return anchorPosition - getAnchorPosition(QPointF(), resizeEdge, windowSize);
	}

	void Window::paintGL()
	{
	m_compositor->startRender();
	QOpenGLFunctions *functions = context()->functions();
	functions->glClearColor(1.f, .6f, .0f, 0.5f);
	functions->glClear(GL_COLOR_BUFFER_BIT \| GL_DEPTH_BUFFER_BIT);

	m_textureBlitter.bind();
	drawBackground();

	functions->glEnable(GL_BLEND);
	functions->glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

	GLenum currentTarget = GL_TEXTURE_2D;
	const auto views = m_compositor->views();
	for (View *view : views) {
	if (view->isCursor())
	continue;
	auto texture = view->getTexture();
	if (!texture)
	continue;
	if (texture->target() != currentTarget) {
	currentTarget = texture->target();
	m_textureBlitter.bind(currentTarget);
	}
	QWaylandSurface *surface = view->surface();
	if ((surface && surface->hasContent()) \|\| view->isBufferLocked()) {
	QSize s = view->size();
	if (!s.isEmpty()) {
	if (m_mouseView == view && m_grabState == ResizeGrab && m_resizeAnchored)
	view->setPosition(getAnchoredPosition(m_resizeAnchorPosition, m_resizeEdge, s));
	QPointF pos = view->position() + view->parentPosition();
	QRectF surfaceGeometry(pos, s);
	auto surfaceOrigin = view->textureOrigin();
	auto sf = view->animationFactor();
	QRectF targetRect(surfaceGeometry.topLeft() * sf, surfaceGeometry.size() * sf);
	QMatrix4x4 targetTransform = QOpenGLTextureBlitter::targetTransform(targetRect, QRect(QPoint(), size()));
	m_textureBlitter.blit(texture->textureId(), targetTransform, surfaceOrigin);
	}
	}
	}
	functions->glDisable(GL_BLEND);

	m_textureBlitter.release();
	m_compositor->endRender();
	}

	View *Window::viewAt(const QPointF &point)
	{
	View *ret = nullptr;
	const auto views = m_compositor->views();
	for (View *view : views) {
	if (view == m_dragIconView)
	continue;
	QRectF geom(view->position(), view->size());
	if (geom.contains(point))
	ret = view;
	}
	return ret;
	}

	void Window::startMove()
	{
	m_grabState = MoveGrab;
	}

	void Window::startResize(int edge, bool anchored)
	{
	m_initialSize = m_mouseView->windowSize();
	m_grabState = ResizeGrab;
	m_resizeEdge = edge;
	m_resizeAnchored = anchored;
	m_resizeAnchorPosition = getAnchorPosition(m_mouseView->position(), edge, m_mouseView->surface()->destinationSize());
	}

	void Window::startDrag(View *dragIcon)
	{
	m_grabState = DragGrab;
	m_dragIconView = dragIcon;
	m_compositor->raise(dragIcon);
	}

	void Window::mousePressEvent(QMouseEvent *e)
	{
	if (mouseGrab())
	return;
	if (m_mouseView.isNull()) {
	m_mouseView = viewAt(e->localPos());
	if (!m_mouseView) {
	m_compositor->closePopups();
	return;
	}
	if (e->modifiers() == Qt::AltModifier \|\| e->modifiers() == Qt::MetaModifier)
	m_grabState = MoveGrab; //start move
	else
	m_compositor->raise(m_mouseView);
	m_initialMousePos = e->localPos();
	m_mouseOffset = e->localPos() - m_mouseView->position();

	QMouseEvent moveEvent(QEvent::MouseMove, e->localPos(), e->globalPos(), Qt::NoButton, Qt::NoButton, e->modifiers());
	sendMouseEvent(&moveEvent, m_mouseView);
	}
	sendMouseEvent(e, m_mouseView);
	}

	void Window::mouseReleaseEvent(QMouseEvent *e)
	{
	if (!mouseGrab())
	sendMouseEvent(e, m_mouseView);
	if (e->buttons() == Qt::NoButton) {
	if (m_grabState == DragGrab) {
	View *view = viewAt(e->localPos());
	m_compositor->handleDrag(view, e);
	}
	m_mouseView = nullptr;
	m_grabState = NoGrab;
	}
	}

	void Window::mouseMoveEvent(QMouseEvent *e)
	{
	switch (m_grabState) {
	case NoGrab: {
	View *view = m_mouseView ? m_mouseView.data() : viewAt(e->localPos());
	sendMouseEvent(e, view);
	if (!view)
	setCursor(Qt::ArrowCursor);
	}
	break;
	case MoveGrab: {
	m_mouseView->setPosition(e->localPos() - m_mouseOffset);
	update();
	}
	break;
	case ResizeGrab: {
	QPoint delta = (e->localPos() - m_initialMousePos).toPoint();
	m_compositor->handleResize(m_mouseView, m_initialSize, delta, m_resizeEdge);
	}
	break;
	case DragGrab: {
	View *view = viewAt(e->localPos());
	m_compositor->handleDrag(view, e);
	if (m_dragIconView) {
	m_dragIconView->setPosition(e->localPos() + m_dragIconView->offset());
	update();
	}
	}
	break;
	}
	}

	void Window::sendMouseEvent(QMouseEvent e, View target)
	{
	QPointF mappedPos = e->localPos();
	if (target)
	mappedPos -= target->position();
	QMouseEvent viewEvent(e->type(), mappedPos, e->localPos(), e->button(), e->buttons(), e->modifiers());
	m_compositor->handleMouseEvent(target, &viewEvent);
	}

	void Window::keyPressEvent(QKeyEvent *e)
	{
	m_compositor->defaultSeat()->sendKeyPressEvent(e->nativeScanCode());
	}

	void Window::keyReleaseEvent(QKeyEvent *e)
	{
	m_compositor->defaultSeat()->sendKeyReleaseEvent(e->nativeScanCode());
	}