首页 > 代码库 > Qt: 内建对话框（各种对话框都有了，且用到了qobject_cast解析sender的技术）
Qt: 内建对话框（各种对话框都有了，且用到了qobject_cast解析sender的技术）
#include "BuiltinDialog.h"
#include <QtGui/QTextEdit>
#include <QtGui/QPushButton>
#include <QtGui/QFileDialog>
#include <QtGui/QFontDialog>
#include <QtGui/QColorDialog>
#include <QtGui/QPrintDialog>
#include <QtGui/QInputDialog>
#include <QtGui/QErrorMessage>
#include <QtGui/QProgressDialog>
#include <QtGui/QPageSetupDialog>
#include <QtGui/QGridLayout>
#include <QtGui/QPalette>
#include <QtGui/QColor>
#include <QtGui/QPrinter>
#include <QtGui/QApplication>
#include <QtDebug>
BuiltinDialog::BuiltinDialog(QWidget *parent) :
QDialog(parent) {
// Create widgets.
displayTextEdit = new QTextEdit();
showFileDialogButton = new QPushButton(QObject::tr("File Dialog"));
showFontDialogButton = new QPushButton(QObject::tr("Font Dialog"));
showColorDialogButton = new QPushButton(QObject::tr("Color Dialog"));
showPrintDialogButton = new QPushButton(QObject::tr("Print Dialog"));
showInputDialogButton = new QPushButton(QObject::tr("Input Dialog"));
showErrorDialogButton = new QPushButton(QObject::tr("Error Dialog"));
showProgressDialogButton = new QPushButton(QObject::tr("Progress Dialog"));
showPageSetupDialogButton = new QPushButton(
QObject::tr("Page Setup Dialog"));
// Lay out widgets.
QGridLayout *gridLayout = new QGridLayout();
gridLayout->addWidget(showFileDialogButton, 0, 0, 1, 1);
gridLayout->addWidget(showFontDialogButton, 0, 1, 1, 1);
gridLayout->addWidget(showColorDialogButton, 0, 2, 1, 1);
gridLayout->addWidget(showPrintDialogButton, 1, 0, 1, 1);
gridLayout->addWidget(showInputDialogButton, 1, 1, 1, 1);
gridLayout->addWidget(showErrorDialogButton, 1, 2, 1, 1);
gridLayout->addWidget(showProgressDialogButton, 2, 0, 1, 1);
gridLayout->addWidget(showPageSetupDialogButton, 2, 1, 1, 1);
gridLayout->addWidget(displayTextEdit, 3, 0, 3, 3);
setLayout(gridLayout);
// Connect signals and slots.
QObject::connect(showFileDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
QObject::connect(showFontDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
QObject::connect(showColorDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
QObject::connect(showPrintDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
QObject::connect(showInputDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
QObject::connect(showErrorDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
QObject::connect(showProgressDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
QObject::connect(showPageSetupDialogButton, SIGNAL(clicked()), this, SLOT(
buttonsClicked()));
// Initialize.
setWindowTitle(QObject::tr("Builtin Dialogs"));
}
void BuiltinDialog::buttonsClicked() {
QPushButton *button = qobject_cast<QPushButton *> (sender());
if (button == showFileDialogButton) {
QString fileName = QFileDialog::getOpenFileName(this, QObject::tr(
"Open File"), QDir::home().path(), QObject::tr(
"Images(*.png *.jpg *.gif)"));
displayTextEdit->setText(fileName);
} else if (button == showFontDialogButton) {
bool ok;
const QFont &font = QFontDialog::getFont(&ok, displayTextEdit->font(),
this);
if (ok) {
displayTextEdit->setFont(font);
}
} else if (button == showColorDialogButton) {
QPalette palette = displayTextEdit->palette();
const QColor &color = QColorDialog::getColor(palette.color(
QPalette::Base), this);
if (color.isValid()) {
palette.setColor(QPalette::Base, color);
displayTextEdit->setPalette(palette);
}
} else if (button == showPrintDialogButton) {
QPrinter printer;
QPrintDialog dialog(&printer, this);
dialog.setWindowTitle(QObject::tr("Print Dialog"));
if (QDialog::Accepted == dialog.exec()) {
displayTextEdit->setText("Printing file.....");
}
} else if (button == showInputDialogButton) {
bool ok;
QString text = QInputDialog::getText(this, QObject::tr(
"Input User Name"), QObject::tr("User Name: "),
QLineEdit::Normal, QDir::home().dirName(), &ok);
if (ok && !text.isEmpty()) {
displayTextEdit->setText(text);
}
} else if (button == showErrorDialogButton) {
QErrorMessage box(this);
box.setWindowTitle(QObject::tr("Error Message"));
box.showMessage(QObject::tr("There are errors XX."));
box.showMessage(QObject::tr("There are errors XX."));
box.showMessage(QObject::tr("There are errors XX."));
box.showMessage(QObject::tr("There are errors YY."));
box.exec();
} else if (button == showProgressDialogButton) {
int maxValue = http://www.mamicode.com/10000;
QProgressDialog dialog(QObject::tr("Copying files..."), QObject::tr(
"Cancel"), 0, maxValue, this);
dialog.setWindowModality(Qt::WindowModal);
dialog.setWindowTitle(QObject::tr("Progress Dialog"));
dialog.show();
for (int i = 0; i < maxValue; ++i) {
dialog.setValue(i);
qApp->processEvents();
if (dialog.wasCanceled()) {
break;
}
qDebug() << i; // #include <QtDebug>
}
dialog.setValue(maxValue);
} else if (button == showPageSetupDialogButton) {
QPrinter printer;
QPageSetupDialog dlg(&printer, this);
dlg.setWindowTitle(QObject::tr("Page Setup"));
if (QDialog::Accepted == dlg.exec()) {
displayTextEdit->setText("Page‘s properties are setupped.");
}
}
}
http://www.cppblog.com/biao/archive/2009/03/28/78105.html
Qt: 内建对话框（各种对话框都有了，且用到了qobject_cast解析sender的技术）