passing by reference... my darkest enemy
actual reason below:
In your case (without reference) the compiler generates a temporary object (int) for the first argument of your MyApplication constructor. You pass this temporary int to QApplication’s constructor (with int reference), which saves the address of this reference. Once your MyApplication constructor is done the temporary int is destroyed but QApplication still has its address.
/*
* Hedgewars, a free turn based strategy game
* Copyright (c) 2006-2011 Andrey Korotaev <unC0Rr@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#include <QGridLayout>
#include <QPushButton>
#include <QGroupBox>
#include <QComboBox>
#include <QCheckBox>
#include <QLabel>
#include <QLineEdit>
#include <QSpinBox>
#include <QTextBrowser>
#include <QTableWidget>
#include <QSlider>
#include "pageoptions.h"
#include "hwconsts.h"
#include "fpsedit.h"
#include "igbox.h"
PageOptions::PageOptions(QWidget* parent) :
AbstractPage(parent)
{
QGridLayout * pageLayout = new QGridLayout(this);
pageLayout->setColumnStretch(0, 100);
pageLayout->setColumnStretch(1, 100);
pageLayout->setColumnStretch(2, 100);
pageLayout->setRowStretch(0, 0);
//pageLayout->setRowStretch(1, 100);
pageLayout->setRowStretch(2, 0);
pageLayout->setContentsMargins(7, 7, 7, 0);
pageLayout->setSpacing(0);
QGroupBox * gbTwoBoxes = new QGroupBox(this);
pageLayout->addWidget(gbTwoBoxes, 0, 0, 1, 3);
QGridLayout * gbTBLayout = new QGridLayout(gbTwoBoxes);
gbTBLayout->setMargin(0);
gbTBLayout->setSpacing(0);
gbTBLayout->setAlignment(Qt::AlignTop | Qt::AlignLeft);
QPixmap pmNew(":/res/new.png");
QPixmap pmEdit(":/res/edit.png");
QPixmap pmDelete(":/res/delete.png");
{
teamsBox = new IconedGroupBox(this);
//teamsBox->setContentTopPadding(0);
//teamsBox->setAttribute(Qt::WA_PaintOnScreen, true);
teamsBox->setIcon(QIcon(":/res/teamicon.png"));
teamsBox->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
teamsBox->setTitle(QGroupBox::tr("Teams"));
QGridLayout * GBTlayout = new QGridLayout(teamsBox);
CBTeamName = new QComboBox(teamsBox);
GBTlayout->addWidget(CBTeamName, 0, 0);
BtnNewTeam = new QPushButton(teamsBox);
BtnNewTeam->setToolTip(tr("New team"));
BtnNewTeam->setIconSize(pmNew.size());
BtnNewTeam->setIcon(pmNew);
BtnNewTeam->setMaximumWidth(pmNew.width() + 6);
GBTlayout->addWidget(BtnNewTeam, 0, 1);
BtnEditTeam = new QPushButton(teamsBox);
BtnEditTeam->setToolTip(tr("Edit team"));
BtnEditTeam->setIconSize(pmEdit.size());
BtnEditTeam->setIcon(pmEdit);
BtnEditTeam->setMaximumWidth(pmEdit.width() + 6);
GBTlayout->addWidget(BtnEditTeam, 0, 2);
BtnDeleteTeam = new QPushButton(teamsBox);
BtnDeleteTeam->setToolTip(tr("Delete team"));
BtnDeleteTeam->setIconSize(pmDelete.size());
BtnDeleteTeam->setIcon(pmDelete);
BtnDeleteTeam->setMaximumWidth(pmDelete.width() + 6);
GBTlayout->addWidget(BtnDeleteTeam, 0, 3);
LblNoEditTeam = new QLabel(teamsBox);
LblNoEditTeam->setText(tr("You can't edit teams from team selection. Go back to main menu to add, edit or delete teams."));
LblNoEditTeam->setWordWrap(true);
LblNoEditTeam->setVisible(false);
GBTlayout->addWidget(LblNoEditTeam, 0, 0);
gbTBLayout->addWidget(teamsBox, 0, 0);
}
{
IconedGroupBox* groupWeapons = new IconedGroupBox(this);
//groupWeapons->setContentTopPadding(0);
//groupWeapons->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
groupWeapons->setIcon(QIcon(":/res/weaponsicon.png"));
groupWeapons->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
groupWeapons->setTitle(QGroupBox::tr("Schemes and Weapons"));
QGridLayout * WeaponsLayout = new QGridLayout(groupWeapons);
QLabel* SchemeLabel = new QLabel(groupWeapons);
SchemeLabel->setText(QLabel::tr("Game scheme"));
WeaponsLayout->addWidget(SchemeLabel, 1, 0);
SchemesName = new QComboBox(groupWeapons);
WeaponsLayout->addWidget(SchemesName, 1, 1);
SchemeNew = new QPushButton(groupWeapons);
SchemeNew->setToolTip(tr("New scheme"));
SchemeNew->setIconSize(pmNew.size());
SchemeNew->setIcon(pmNew);
SchemeNew->setMaximumWidth(pmNew.width() + 6);
WeaponsLayout->addWidget(SchemeNew, 1, 2);
SchemeEdit = new QPushButton(groupWeapons);
SchemeEdit->setToolTip(tr("Edit scheme"));
SchemeEdit->setIconSize(pmEdit.size());
SchemeEdit->setIcon(pmEdit);
SchemeEdit->setMaximumWidth(pmEdit.width() + 6);
WeaponsLayout->addWidget(SchemeEdit, 1, 3);
SchemeDelete = new QPushButton(groupWeapons);
SchemeDelete->setToolTip(tr("Delete scheme"));
SchemeDelete->setIconSize(pmDelete.size());
SchemeDelete->setIcon(pmDelete);
SchemeDelete->setMaximumWidth(pmDelete.width() + 6);
WeaponsLayout->addWidget(SchemeDelete, 1, 4);
QLabel* WeaponLabel = new QLabel(groupWeapons);
WeaponLabel->setText(QLabel::tr("Weapons"));
WeaponsLayout->addWidget(WeaponLabel, 2, 0);
WeaponsName = new QComboBox(groupWeapons);
WeaponsLayout->addWidget(WeaponsName, 2, 1);
WeaponNew = new QPushButton(groupWeapons);
WeaponNew->setToolTip(tr("New weapon set"));
WeaponNew->setIconSize(pmNew.size());
WeaponNew->setIcon(pmNew);
WeaponNew->setMaximumWidth(pmNew.width() + 6);
WeaponsLayout->addWidget(WeaponNew, 2, 2);
WeaponEdit = new QPushButton(groupWeapons);
WeaponEdit->setToolTip(tr("Edit weapon set"));
WeaponEdit->setIconSize(pmEdit.size());
WeaponEdit->setIcon(pmEdit);
WeaponEdit->setMaximumWidth(pmEdit.width() + 6);
WeaponsLayout->addWidget(WeaponEdit, 2, 3);
WeaponDelete = new QPushButton(groupWeapons);
WeaponDelete->setToolTip(tr("Delete weapon set"));
WeaponDelete->setIconSize(pmDelete.size());
WeaponDelete->setIcon(pmDelete);
WeaponDelete->setMaximumWidth(pmDelete.width() + 6);
WeaponsLayout->addWidget(WeaponDelete, 2, 4);
WeaponTooltip = new QCheckBox(this);
WeaponTooltip->setText(QCheckBox::tr("Show ammo menu tooltips"));
WeaponsLayout->addWidget(WeaponTooltip, 3, 0, 1, 4);
gbTBLayout->addWidget(groupWeapons, 1, 0);
}
{
IconedGroupBox* groupMisc = new IconedGroupBox(this);
//groupMisc->setContentTopPadding(0);
groupMisc->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
groupMisc->setIcon(QIcon(":/res/miscicon.png"));
//groupMisc->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
groupMisc->setTitle(QGroupBox::tr("Misc"));
QGridLayout * MiscLayout = new QGridLayout(groupMisc);
labelNN = new QLabel(groupMisc);
labelNN->setText(QLabel::tr("Net nick"));
MiscLayout->addWidget(labelNN, 0, 0);
editNetNick = new QLineEdit(groupMisc);
editNetNick->setMaxLength(20);
editNetNick->setText(QLineEdit::tr("unnamed"));
connect(editNetNick, SIGNAL(editingFinished()), this, SLOT(trimNetNick()));
MiscLayout->addWidget(editNetNick, 0, 1);
labelNetPassword = new QLabel(groupMisc);
labelNetPassword->setText(QLabel::tr("Password"));
MiscLayout->addWidget(labelNetPassword, 1, 0);
editNetPassword = new QLineEdit(groupMisc);
editNetPassword->setEchoMode(QLineEdit::Password);
MiscLayout->addWidget(editNetPassword, 1, 1);
QLabel *labelLanguage = new QLabel(groupMisc);
labelLanguage->setText(QLabel::tr("Locale") + " *");
MiscLayout->addWidget(labelLanguage, 2, 0);
CBLanguage = new QComboBox(groupMisc);
QDir tmpdir;
tmpdir.cd(cfgdir->absolutePath());
tmpdir.cd("Data/Locale");
tmpdir.setFilter(QDir::Files);
QStringList locs = tmpdir.entryList(QStringList("hedgewars_*.qm"));
CBLanguage->addItem(QComboBox::tr("(System default)"), QString(""));
for(int i = 0; i < locs.count(); i++)
{
QLocale loc(locs[i].replace(QRegExp("hedgewars_(.*)\\.qm"), "\\1"));
CBLanguage->addItem(QLocale::languageToString(loc.language()) + " (" + QLocale::countryToString(loc.country()) + ")", loc.name());
}
tmpdir.cd(datadir->absolutePath());
tmpdir.cd("Locale");
tmpdir.setFilter(QDir::Files);
QStringList tmplist = tmpdir.entryList(QStringList("hedgewars_*.qm"));
for(int i = 0; i < tmplist.count(); i++)
{
if (locs.contains(tmplist[i])) continue;
QLocale loc(tmplist[i].replace(QRegExp("hedgewars_(.*)\\.qm"), "\\1"));
CBLanguage->addItem(QLocale::languageToString(loc.language()) + " (" + QLocale::countryToString(loc.country()) + ")", loc.name());
}
MiscLayout->addWidget(CBLanguage, 2, 1);
CBAltDamage = new QCheckBox(groupMisc);
CBAltDamage->setText(QCheckBox::tr("Alternative damage show"));
MiscLayout->addWidget(CBAltDamage, 3, 0, 1, 2);
CBNameWithDate = new QCheckBox(groupMisc);
CBNameWithDate->setText(QCheckBox::tr("Append date and time to record file name"));
MiscLayout->addWidget(CBNameWithDate, 4, 0, 1, 2);
BtnAssociateFiles = new QPushButton(groupMisc);
BtnAssociateFiles->setText(QPushButton::tr("Associate file extensions"));
BtnAssociateFiles->setEnabled(!custom_data && !custom_config);
MiscLayout->addWidget(BtnAssociateFiles, 5, 0, 1, 2);
#ifdef __APPLE__
#ifdef SPARKLE_ENABLED
CBAutoUpdate = new QCheckBox(groupMisc);
CBAutoUpdate->setText(QCheckBox::tr("Check for updates at startup"));
MiscLayout->addWidget(CBAutoUpdate, 6, 0, 1, 3);
#endif
#endif
gbTBLayout->addWidget(groupMisc, 2, 0);
}
{
AGGroupBox = new IconedGroupBox(this);
//AGGroupBox->setContentTopPadding(0);
AGGroupBox->setIcon(QIcon(":/res/graphicsicon.png"));
//AGGroupBox->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
AGGroupBox->setTitle(QGroupBox::tr("Audio/Graphic options"));
QVBoxLayout * GBAlayout = new QVBoxLayout(AGGroupBox);
QHBoxLayout * GBAreslayout = new QHBoxLayout(0);
QHBoxLayout * GBAstereolayout = new QHBoxLayout(0);
QHBoxLayout * GBAqualayout = new QHBoxLayout(0);
CBFrontendFullscreen = new QCheckBox(AGGroupBox);
CBFrontendFullscreen->setText(QCheckBox::tr("Frontend fullscreen"));
GBAlayout->addWidget(CBFrontendFullscreen);
CBFrontendEffects = new QCheckBox(AGGroupBox);
CBFrontendEffects->setText(QCheckBox::tr("Frontend effects") + " *");
GBAlayout->addWidget(CBFrontendEffects);
CBEnableFrontendSound = new QCheckBox(AGGroupBox);
CBEnableFrontendSound->setText(QCheckBox::tr("Enable frontend sounds"));
GBAlayout->addWidget(CBEnableFrontendSound);
CBEnableFrontendMusic = new QCheckBox(AGGroupBox);
CBEnableFrontendMusic->setText(QCheckBox::tr("Enable frontend music"));
GBAlayout->addWidget(CBEnableFrontendMusic);
QFrame * hr = new QFrame(AGGroupBox);
hr->setFrameStyle(QFrame::HLine);
hr->setLineWidth(3);
hr->setFixedHeight(10);
GBAlayout->addWidget(hr);
QLabel * resolution = new QLabel(AGGroupBox);
resolution->setText(QLabel::tr("Resolution"));
GBAreslayout->addWidget(resolution);
CBResolution = new QComboBox(AGGroupBox);
GBAreslayout->addWidget(CBResolution);
GBAlayout->addLayout(GBAreslayout);
CBFullscreen = new QCheckBox(AGGroupBox);
CBFullscreen->setText(QCheckBox::tr("Fullscreen"));
GBAlayout->addWidget(CBFullscreen);
connect(CBFullscreen, SIGNAL(stateChanged(int)), this, SLOT(setFullscreen(void)));
QLabel * quality = new QLabel(AGGroupBox);
quality->setText(QLabel::tr("Quality"));
quality->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
GBAqualayout->addWidget(quality);
SLQuality = new QSlider(Qt::Horizontal, AGGroupBox);
SLQuality->setTickPosition(QSlider::TicksBelow);
SLQuality->setMaximum(5);
SLQuality->setMinimum(0);
SLQuality->setFixedWidth(150);
GBAqualayout->addWidget(SLQuality);
GBAlayout->addLayout(GBAqualayout);
QLabel * stereo = new QLabel(AGGroupBox);
stereo->setText(QLabel::tr("Stereo rendering"));
GBAstereolayout->addWidget(stereo);
CBStereoMode = new QComboBox(AGGroupBox);
CBStereoMode->addItem(QComboBox::tr("Disabled"));
CBStereoMode->addItem(QComboBox::tr("Red/Cyan"));
CBStereoMode->addItem(QComboBox::tr("Cyan/Red"));
CBStereoMode->addItem(QComboBox::tr("Red/Blue"));
CBStereoMode->addItem(QComboBox::tr("Blue/Red"));
CBStereoMode->addItem(QComboBox::tr("Red/Green"));
CBStereoMode->addItem(QComboBox::tr("Green/Red"));
CBStereoMode->addItem(QComboBox::tr("Side-by-side"));
CBStereoMode->addItem(QComboBox::tr("Top-Bottom"));
CBStereoMode->addItem(QComboBox::tr("Wiggle"));
connect(CBStereoMode, SIGNAL(currentIndexChanged(int)), this, SLOT(forceFullscreen(int)));
GBAstereolayout->addWidget(CBStereoMode);
GBAlayout->addLayout(GBAstereolayout);
hr = new QFrame(AGGroupBox);
hr->setFrameStyle(QFrame::HLine);
hr->setLineWidth(3);
hr->setFixedHeight(10);
GBAlayout->addWidget(hr);
QHBoxLayout * GBAvollayout = new QHBoxLayout(0);
QLabel * vol = new QLabel(AGGroupBox);
vol->setText(QLabel::tr("Initial sound volume"));
GBAvollayout->addWidget(vol);
GBAlayout->addLayout(GBAvollayout);
volumeBox = new QSpinBox(AGGroupBox);
volumeBox->setRange(0, 100);
volumeBox->setSingleStep(5);
GBAvollayout->addWidget(volumeBox);
CBEnableSound = new QCheckBox(AGGroupBox);
CBEnableSound->setText(QCheckBox::tr("Enable sound"));
GBAlayout->addWidget(CBEnableSound);
CBEnableMusic = new QCheckBox(AGGroupBox);
CBEnableMusic->setText(QCheckBox::tr("Enable music"));
GBAlayout->addWidget(CBEnableMusic);
hr = new QFrame(AGGroupBox);
hr->setFrameStyle(QFrame::HLine);
hr->setLineWidth(3);
hr->setFixedHeight(10);
GBAlayout->addWidget(hr);
QHBoxLayout * GBAfpslayout = new QHBoxLayout(0);
QLabel * maxfps = new QLabel(AGGroupBox);
maxfps->setText(QLabel::tr("FPS limit"));
GBAfpslayout->addWidget(maxfps);
GBAlayout->addLayout(GBAfpslayout);
fpsedit = new FPSEdit(AGGroupBox);
GBAfpslayout->addWidget(fpsedit);
CBShowFPS = new QCheckBox(AGGroupBox);
CBShowFPS->setText(QCheckBox::tr("Show FPS"));
GBAlayout->addWidget(CBShowFPS);
hr = new QFrame(AGGroupBox);
hr->setFrameStyle(QFrame::HLine);
hr->setLineWidth(3);
hr->setFixedHeight(10);
GBAlayout->addWidget(hr);
QLabel *restartNote = new QLabel(this);
restartNote->setText(QString("* ") + QLabel::tr("Restart game to apply"));
restartNote->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
GBAlayout->addWidget(restartNote);
gbTBLayout->addWidget(AGGroupBox, 0, 1, 3, 1);
}
BtnSaveOptions = addButton(":/res/Save.png", pageLayout, 2, 2, true);
BtnSaveOptions->setStyleSheet("QPushButton{margin: 12px 0px 12px 0px;}");
BtnBack = addButton(":/res/Exit.png", pageLayout, 2, 0, true);
BtnBack->setFixedHeight(BtnSaveOptions->height());
BtnBack->setFixedWidth(BtnBack->width()+2);
BtnBack->setStyleSheet("QPushButton{margin: 22px 0 9px 2px;}");
}
void PageOptions::forceFullscreen(int index)
{
if (index != 0) {
previousFullscreenValue = this->CBFullscreen->isChecked();
this->CBFullscreen->setChecked(true);
this->CBFullscreen->setEnabled(false);
previousQuality = this->SLQuality->value();
this->SLQuality->setValue(this->SLQuality->maximum());
this->SLQuality->setEnabled(false);
} else {
this->CBFullscreen->setChecked(previousFullscreenValue);
this->CBFullscreen->setEnabled(true);
this->SLQuality->setValue(previousQuality);
this->SLQuality->setEnabled(true);
}
}
void PageOptions::setFullscreen(void)
{
int tmp = this->CBResolution->currentIndex();
if (this->CBFullscreen->isChecked())
this->CBResolution->setCurrentIndex(0);
else
this->CBResolution->setCurrentIndex(previousResolutionIndex);
previousResolutionIndex = tmp;
this->CBResolution->setEnabled(!this->CBFullscreen->isChecked());
}
void PageOptions::trimNetNick()
{
editNetNick->setText(editNetNick->text().trimmed());
}