291 lines
8.6 KiB
C++
291 lines
8.6 KiB
C++
/*
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* SPDX-FileCopyrightText: 2014 Hugo Pereira Da Costa <hugo.pereira@free.fr>
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "breezesizegrip.h"
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#include <KDecoration2/DecoratedClient>
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#include <QPainter>
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#include <QPolygon>
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#include <QTimer>
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#if BREEZE_HAVE_X11
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#include <QX11Info>
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#endif
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namespace Breeze
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{
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//* scoped pointer convenience typedef
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template <typename T> using ScopedPointer = QScopedPointer<T, QScopedPointerPodDeleter>;
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//_____________________________________________
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SizeGrip::SizeGrip( Decoration* decoration ):QWidget(nullptr)
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,m_decoration( decoration )
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{
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setAttribute(Qt::WA_NoSystemBackground );
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setAutoFillBackground( false );
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// cursor
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setCursor( Qt::SizeFDiagCursor );
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// size
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setFixedSize( QSize( GripSize, GripSize ) );
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// mask
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setMask( QRegion( QVector<QPoint>{
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QPoint( 0, GripSize ),
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QPoint( GripSize, 0 ),
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QPoint( GripSize, GripSize ),
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QPoint( 0, GripSize )} ) );
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// embed
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embed();
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updatePosition();
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// connections
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auto c = decoration->client().data();
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connect( c, &KDecoration2::DecoratedClient::widthChanged, this, &SizeGrip::updatePosition );
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connect( c, &KDecoration2::DecoratedClient::heightChanged, this, &SizeGrip::updatePosition );
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connect( c, &KDecoration2::DecoratedClient::activeChanged, this, &SizeGrip::updateActiveState );
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// show
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show();
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}
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//_____________________________________________
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SizeGrip::~SizeGrip()
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{}
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//_____________________________________________
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void SizeGrip::updateActiveState()
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{
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#if BREEZE_HAVE_X11
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if( QX11Info::isPlatformX11() )
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{
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const quint32 value = XCB_STACK_MODE_ABOVE;
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xcb_configure_window( QX11Info::connection(), winId(), XCB_CONFIG_WINDOW_STACK_MODE, &value );
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xcb_map_window( QX11Info::connection(), winId() );
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}
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#endif
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update();
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}
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//_____________________________________________
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void SizeGrip::embed()
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{
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#if BREEZE_HAVE_X11
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if( !QX11Info::isPlatformX11() ) return;
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auto c = m_decoration.data()->client().data();
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xcb_window_t windowId = c->windowId();
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if( windowId )
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{
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/*
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find client's parent
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we want the size grip to be at the same level as the client in the stack
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*/
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xcb_window_t current = windowId;
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auto connection = QX11Info::connection();
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xcb_query_tree_cookie_t cookie = xcb_query_tree_unchecked( connection, current );
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ScopedPointer<xcb_query_tree_reply_t> tree(xcb_query_tree_reply( connection, cookie, nullptr ) );
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if( !tree.isNull() && tree->parent ) current = tree->parent;
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// reparent
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xcb_reparent_window( connection, winId(), current, 0, 0 );
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setWindowTitle( "Breeze::SizeGrip" );
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} else {
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hide();
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}
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#endif
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}
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//_____________________________________________
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void SizeGrip::paintEvent( QPaintEvent* )
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{
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if( !m_decoration ) return;
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// get relevant colors
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const QColor backgroundColor( m_decoration.data()->titleBarColor() );
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// create and configure painter
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QPainter painter(this);
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painter.setRenderHints(QPainter::Antialiasing );
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painter.setPen( Qt::NoPen );
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painter.setBrush( backgroundColor );
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// polygon
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painter.drawPolygon( QVector<QPoint> {
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QPoint( 0, GripSize ),
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QPoint( GripSize, 0 ),
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QPoint( GripSize, GripSize ),
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QPoint( 0, GripSize )} );
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}
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//_____________________________________________
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void SizeGrip::mousePressEvent( QMouseEvent* event )
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{
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switch (event->button())
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{
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case Qt::RightButton:
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{
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hide();
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QTimer::singleShot(5000, this, &QWidget::show);
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break;
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}
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case Qt::MiddleButton:
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{
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hide();
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break;
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}
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case Qt::LeftButton:
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if( rect().contains( event->pos() ) )
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{ sendMoveResizeEvent( event->pos() ); }
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break;
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default: break;
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}
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}
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//_______________________________________________________________________________
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void SizeGrip::updatePosition()
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{
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#if BREEZE_HAVE_X11
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if( !QX11Info::isPlatformX11() ) return;
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auto c = m_decoration.data()->client().data();
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QPoint position(
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c->width() - GripSize - Offset,
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c->height() - GripSize - Offset );
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quint32 values[2] = { quint32(position.x()), quint32(position.y()) };
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xcb_configure_window( QX11Info::connection(), winId(), XCB_CONFIG_WINDOW_X | XCB_CONFIG_WINDOW_Y, values );
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#endif
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}
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//_____________________________________________
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void SizeGrip::sendMoveResizeEvent( QPoint position )
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{
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#if BREEZE_HAVE_X11
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if( !QX11Info::isPlatformX11() ) return;
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// pointer to connection
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auto connection( QX11Info::connection() );
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// client
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auto c = m_decoration.data()->client().data();
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/*
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get root position matching position
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need to use xcb because the embedding of the widget
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breaks QT's mapToGlobal and other methods
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*/
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QPoint rootPosition( position );
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xcb_get_geometry_cookie_t cookie( xcb_get_geometry( connection, winId() ) );
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ScopedPointer<xcb_get_geometry_reply_t> reply( xcb_get_geometry_reply( connection, cookie, nullptr ) );
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if( reply )
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{
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// translate coordinates
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xcb_translate_coordinates_cookie_t coordCookie( xcb_translate_coordinates(
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connection, winId(), reply.data()->root,
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-reply.data()->border_width,
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-reply.data()->border_width ) );
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ScopedPointer< xcb_translate_coordinates_reply_t> coordReply( xcb_translate_coordinates_reply( connection, coordCookie, nullptr ) );
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if( coordReply )
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{
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rootPosition.rx() += coordReply.data()->dst_x;
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rootPosition.ry() += coordReply.data()->dst_y;
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}
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}
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// move/resize atom
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if( !m_moveResizeAtom )
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{
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// create atom if not found
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const QString atomName( "_NET_WM_MOVERESIZE" );
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xcb_intern_atom_cookie_t cookie( xcb_intern_atom( connection, false, atomName.size(), qPrintable( atomName ) ) );
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ScopedPointer<xcb_intern_atom_reply_t> reply( xcb_intern_atom_reply( connection, cookie, nullptr ) );
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m_moveResizeAtom = reply ? reply->atom:0;
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}
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if( !m_moveResizeAtom ) return;
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// button release event
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xcb_button_release_event_t releaseEvent;
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memset(&releaseEvent, 0, sizeof(releaseEvent));
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releaseEvent.response_type = XCB_BUTTON_RELEASE;
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releaseEvent.event = winId();
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releaseEvent.child = XCB_WINDOW_NONE;
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releaseEvent.root = QX11Info::appRootWindow();
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releaseEvent.event_x = position.x();
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releaseEvent.event_y = position.y();
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releaseEvent.root_x = rootPosition.x();
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releaseEvent.root_y = rootPosition.y();
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releaseEvent.detail = XCB_BUTTON_INDEX_1;
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releaseEvent.state = XCB_BUTTON_MASK_1;
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releaseEvent.time = XCB_CURRENT_TIME;
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releaseEvent.same_screen = true;
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xcb_send_event( connection, false, winId(), XCB_EVENT_MASK_BUTTON_RELEASE, reinterpret_cast<const char*>(&releaseEvent));
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xcb_ungrab_pointer( connection, XCB_TIME_CURRENT_TIME );
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// move resize event
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xcb_client_message_event_t clientMessageEvent;
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memset(&clientMessageEvent, 0, sizeof(clientMessageEvent));
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clientMessageEvent.response_type = XCB_CLIENT_MESSAGE;
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clientMessageEvent.type = m_moveResizeAtom;
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clientMessageEvent.format = 32;
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clientMessageEvent.window = c->windowId();
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clientMessageEvent.data.data32[0] = rootPosition.x();
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clientMessageEvent.data.data32[1] = rootPosition.y();
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clientMessageEvent.data.data32[2] = 4; // bottom right
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clientMessageEvent.data.data32[3] = Qt::LeftButton;
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clientMessageEvent.data.data32[4] = 0;
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xcb_send_event( connection, false, QX11Info::appRootWindow(),
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XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY |
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XCB_EVENT_MASK_SUBSTRUCTURE_REDIRECT,
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reinterpret_cast<const char*>(&clientMessageEvent) );
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xcb_flush( connection );
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#endif
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}
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}
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