129 lines
3.8 KiB
C++
129 lines
3.8 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2021 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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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; either version 2 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 GNU
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* General Public License 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "menubutton.h"
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#include "support/icon.h"
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#include "icons.h"
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#include <QAction>
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#include <QMenu>
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#include <QEvent>
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#include <QApplication>
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#include <QDesktopWidget>
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#include <QProxyStyle>
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#ifdef Q_OS_WIN
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#include <windows.h>
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#include <VersionHelpers.h>
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#ifndef _WIN32_WINNT_WIN10
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#define _WIN32_WINNT_WIN10 0x0A00
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#endif
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#endif
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MenuButton::MenuButton(QWidget *parent)
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: ToolButton(parent)
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{
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setPopupMode(QToolButton::InstantPopup);
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setIcon(Icons::self()->menuIcon);
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setToolTip(tr("Menu"));
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installEventFilter(this);
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}
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void MenuButton::controlState()
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{
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if (!menu()) {
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return;
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}
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for (QAction *a: menu()->actions()) {
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if (a->isEnabled() && a->isVisible() && !a->isSeparator()) {
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setEnabled(true);
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return;
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}
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}
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setEnabled(false);
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}
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void MenuButton::setAlignedMenu(QMenu *m)
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{
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QToolButton::setMenu(m);
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#ifdef Q_OS_WIN
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if (!IsWindowsVersionOrGreater(HIBYTE(_WIN32_WINNT_WIN10), LOBYTE(_WIN32_WINNT_WIN10), 0)) {
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return;
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}
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#endif
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m->installEventFilter(this);
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}
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void MenuButton::addSeparator()
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{
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QAction *sep=new QAction(this);
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sep->setSeparator(true);
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addAction(sep);
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}
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bool MenuButton::eventFilter(QObject *o, QEvent *e)
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{
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if (QEvent::Show==e->type()) {
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if (qobject_cast<QMenu *>(o)) {
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static int shadowAdjust = -1;
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if (-1==shadowAdjust) {
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// Kvantum style adds its own shadows, which makes the menu appear in the wrong place.
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// However, Kvatum sill set a property on the style object to indicate the size of
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// the shadows. Use this to adjust positioning.
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QProxyStyle *proxy=qobject_cast<QProxyStyle *>(style());
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QStyle *check=proxy && proxy->baseStyle() ? proxy->baseStyle() : style();
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QList<int> shadows = check ? check->property("menu_shadow").value<QList<int> >() : QList<int>();
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shadowAdjust = 4 == shadows.length() ? shadows.at(2) : 0;
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if (shadowAdjust<0 || shadowAdjust>18) {
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shadowAdjust = 0;
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}
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}
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QMenu *mnu=static_cast<QMenu *>(o);
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QPoint p=parentWidget()->mapToGlobal(pos());
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int newPos=isRightToLeft()
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? p.x()
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: ((p.x()+width()+shadowAdjust)-mnu->width());
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if (newPos<0) {
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newPos=0;
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} else {
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QDesktopWidget *dw=QApplication::desktop();
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if (dw) {
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QRect geo=dw->availableGeometry(this);
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int maxWidth=geo.x()+geo.width();
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if (maxWidth>0 && (newPos+mnu->width())>maxWidth) {
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newPos=maxWidth-mnu->width();
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}
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}
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}
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mnu->move(newPos, mnu->y());
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} else if (o==this) {
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setMinimumWidth(height());
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removeEventFilter(this);
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}
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}
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return ToolButton::eventFilter(o, e);
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}
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#include "moc_menubutton.cpp"
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