大家可以参见QT中各种MessageBox的使用的这篇文章
界面效果图如下，大家可以用代码自己操作
diglog.h
#ifndef DIALOG_H
#define DIALOG_H
#include <QDialog>
QT_BEGIN_NAMESPACE
class QCheckBox;
class QLabel;
class QErrorMessage;
QT_END_NAMESPACE
class Dialog : public QDialog
{
Q_OBJECT
public:
Dialog(QWidget *parent = 0);
private slots:
void setInteger();
void setDouble();
void setItem();
void setText();
void setColor();
void setFont();
void setExistingDirectory();
void setOpenFileName();
void setOpenFileNames();
void setSaveFileName();
void criticalMessage();
void informationMessage();
void questionMessage();
void warningMessage();
void errorMessage();
private:
QCheckBox *native;
QLabel *integerLabel;
QLabel *doubleLabel;
QLabel *itemLabel;
QLabel *textLabel;
QLabel *colorLabel;
QLabel *fontLabel;
QLabel *directoryLabel;
QLabel *openFileNameLabel;
QLabel *openFileNamesLabel;
QLabel *saveFileNameLabel;
QLabel *criticalLabel;
QLabel *informationLabel;
QLabel *questionLabel;
QLabel *warningLabel;
QLabel *errorLabel;
QErrorMessage *errorMessageDialog;
QString openFilesPath;
};
#endif
dialog.cpp
#include <QtGui>
#include "dialog.h"
#define MESSAGE \
Dialog::tr("<p>Message boxes have a caption, a text, " \
"and any number of buttons, each with standard or custom texts." \
"<p>Click a button to close the message box. Pressing the Esc button " \
"will activate the detected escape button (if any).")
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
{
errorMessageDialog = new QErrorMessage(this);
int frameStyle = QFrame::Sunken | QFrame::Panel;
integerLabel = new QLabel;
integerLabel->setFrameStyle(frameStyle);
QPushButton *integerButton =
new QPushButton(tr("QInputDialog::get&Int()"));
doubleLabel = new QLabel;
doubleLabel->setFrameStyle(frameStyle);
QPushButton *doubleButton =
new QPushButton(tr("QInputDialog::get&Double()"));
itemLabel = new QLabel;
itemLabel->setFrameStyle(frameStyle);
QPushButton *itemButton = new QPushButton(tr("QInputDialog::getIte&m()"));
textLabel = new QLabel;
textLabel->setFrameStyle(frameStyle);
QPushButton *textButton = new QPushButton(tr("QInputDialog::get&Text()"));
colorLabel = new QLabel;
colorLabel->setFrameStyle(frameStyle);
QPushButton *colorButton = new QPushButton(tr("QColorDialog::get&Color()"));
fontLabel = new QLabel;
fontLabel->setFrameStyle(frameStyle);
QPushButton *fontButton = new QPushButton(tr("QFontDialog::get&Font()"));
directoryLabel = new QLabel;
directoryLabel->setFrameStyle(frameStyle);
QPushButton *directoryButton =
new QPushButton(tr("QFileDialog::getE&xistingDirectory()"));
openFileNameLabel = new QLabel;
openFileNameLabel->setFrameStyle(frameStyle);
QPushButton *openFileNameButton =
new QPushButton(tr("QFileDialog::get&OpenFileName()"));
openFileNamesLabel = new QLabel;
openFileNamesLabel->setFrameStyle(frameStyle);
QPushButton *openFileNamesButton =
new QPushButton(tr("QFileDialog::&getOpenFileNames()"));
saveFileNameLabel = new QLabel;
saveFileNameLabel->setFrameStyle(frameStyle);
QPushButton *saveFileNameButton =
new QPushButton(tr("QFileDialog::get&SaveFileName()"));
criticalLabel = new QLabel;
criticalLabel->setFrameStyle(frameStyle);
QPushButton *criticalButton =
new QPushButton(tr("QMessageBox::critica&l()"));
informationLabel = new QLabel;
informationLabel->setFrameStyle(frameStyle);
QPushButton *informationButton =
new QPushButton(tr("QMessageBox::i&nformation()"));
questionLabel = new QLabel;
questionLabel->setFrameStyle(frameStyle);
QPushButton *questionButton =
new QPushButton(tr("QMessageBox::&question()"));
warningLabel = new QLabel;
warningLabel->setFrameStyle(frameStyle);
QPushButton *warningButton = new QPushButton(tr("QMessageBox::&warning()"));
errorLabel = new QLabel;
errorLabel->setFrameStyle(frameStyle);
QPushButton *errorButton =
new QPushButton(tr("QErrorMessage::showM&essage()"));
connect(integerButton, SIGNAL(clicked()), this, SLOT(setInteger()));
connect(doubleButton, SIGNAL(clicked()), this, SLOT(setDouble()));
connect(itemButton, SIGNAL(clicked()), this, SLOT(setItem()));
connect(textButton, SIGNAL(clicked()), this, SLOT(setText()));
connect(colorButton, SIGNAL(clicked()), this, SLOT(setColor()));
connect(fontButton, SIGNAL(clicked()), this, SLOT(setFont()));
connect(directoryButton, SIGNAL(clicked()),
this, SLOT(setExistingDirectory()));
connect(openFileNameButton, SIGNAL(clicked()),
this, SLOT(setOpenFileName()));
connect(openFileNamesButton, SIGNAL(clicked()),
this, SLOT(setOpenFileNames()));
connect(saveFileNameButton, SIGNAL(clicked()),
this, SLOT(setSaveFileName()));
connect(criticalButton, SIGNAL(clicked()), this, SLOT(criticalMessage()));
connect(informationButton, SIGNAL(clicked()),
this, SLOT(informationMessage()));
connect(questionButton, SIGNAL(clicked()), this, SLOT(questionMessage()));
connect(warningButton, SIGNAL(clicked()), this, SLOT(warningMessage()));
connect(errorButton, SIGNAL(clicked()), this, SLOT(errorMessage()));
native = new QCheckBox(this);
native->setText("Use native file dialog.");
native->setChecked(true);
QGridLayout *layout = new QGridLayout;
layout->setColumnStretch(1, 1);
layout->setColumnMinimumWidth(1, 250);
layout->addWidget(integerButton, 0, 0);
layout->addWidget(integerLabel, 0, 1);
layout->addWidget(doubleButton, 1, 0);
layout->addWidget(doubleLabel, 1, 1);
layout->addWidget(itemButton, 2, 0);
layout->addWidget(itemLabel, 2, 1);
layout->addWidget(textButton, 3, 0);
layout->addWidget(textLabel, 3, 1);
layout->addWidget(colorButton, 4, 0);
layout->addWidget(colorLabel, 4, 1);
layout->addWidget(fontButton, 5, 0);
layout->addWidget(fontLabel, 5, 1);
layout->addWidget(directoryButton, 6, 0);
layout->addWidget(directoryLabel, 6, 1);
layout->addWidget(openFileNameButton, 7, 0);
layout->addWidget(openFileNameLabel, 7, 1);
layout->addWidget(openFileNamesButton, 8, 0);
layout->addWidget(openFileNamesLabel, 8, 1);
layout->addWidget(saveFileNameButton, 9, 0);
layout->addWidget(saveFileNameLabel, 9, 1);
layout->addWidget(criticalButton, 10, 0);
layout->addWidget(criticalLabel, 10, 1);
layout->addWidget(informationButton, 11, 0);
layout->addWidget(informationLabel, 11, 1);
layout->addWidget(questionButton, 12, 0);
layout->addWidget(questionLabel, 12, 1);
layout->addWidget(warningButton, 13, 0);
layout->addWidget(warningLabel, 13, 1);
layout->addWidget(errorButton, 14, 0);
layout->addWidget(errorLabel, 14, 1);
layout->addWidget(native, 15, 0);
setLayout(layout);
setWindowTitle(tr("Standard Dialogs"));
}
void Dialog::setInteger()
{
//! [0]
bool ok;
int i = QInputDialog::getInt(this, tr("QInputDialog::getInteger()"),
tr("Percentage:"), 25, 0, 100, 1, &ok);
if (ok)
integerLabel->setText(tr("%1%").arg(i));
//! [0]
}
void Dialog::setDouble()
{
//! [1]
bool ok;
double d = QInputDialog::getDouble(this, tr("QInputDialog::getDouble()"),
tr("Amount:"), 37.56, -10000, 10000, 2, &ok);
if (ok)
doubleLabel->setText(QString("$%1").arg(d));
//! [1]
}
void Dialog::setItem()
{
//! [2]
QStringList items;
items << tr("Spring") << tr("Summer") << tr("Fall") << tr("Winter");
bool ok;
QString item = QInputDialog::getItem(this, tr("QInputDialog::getItem()"),
tr("Season:"), items, 0, false, &ok);
if (ok && !item.isEmpty())
itemLabel->setText(item);
//! [2]
}
void Dialog::setText()
{
//! [3]
bool ok;
QString text = QInputDialog::getText(this, tr("QInputDialog::getText()"),
tr("User name:"), QLineEdit::Normal,
QDir::home().dirName(), &ok);
if (ok && !text.isEmpty())
textLabel->setText(text);
//! [3]
}
void Dialog::setColor()
{
QColor color;
if (native->isChecked())
color = QColorDialog::getColor(Qt::green, this);
else
color = QColorDialog::getColor(Qt::green, this, "Select Color", QColorDialog::DontUseNativeDialog);
if (color.isValid()) {
colorLabel->setText(color.name());
colorLabel->setPalette(QPalette(color));
colorLabel->setAutoFillBackground(true);
}
}
void Dialog::setFont()
{
bool ok;
QFont font = QFontDialog::getFont(&ok, QFont(fontLabel->text()), this);
if (ok) {
fontLabel->setText(font.key());
fontLabel->setFont(font);
}
}
void Dialog::setExistingDirectory()
{
QFileDialog::Options options = QFileDialog::DontResolveSymlinks | QFileDialog::ShowDirsOnly;
if (!native->isChecked())
options |= QFileDialog::DontUseNativeDialog;
QString directory = QFileDialog::getExistingDirectory(this,
tr("QFileDialog::getExistingDirectory()"),
directoryLabel->text(),
options);
if (!directory.isEmpty())
directoryLabel->setText(directory);
}
void Dialog::setOpenFileName()
{
QFileDialog::Options options;
if (!native->isChecked())
options |= QFileDialog::DontUseNativeDialog;
QString selectedFilter;
QString fileName = QFileDialog::getOpenFileName(this,
tr("QFileDialog::getOpenFileName()"),
openFileNameLabel->text(),
tr("All Files (*);;Text Files (*.txt)"),
&selectedFilter,
options);
if (!fileName.isEmpty())
openFileNameLabel->setText(fileName);
}
void Dialog::setOpenFileNames()
{
QFileDialog::Options options;
if (!native->isChecked())
options |= QFileDialog::DontUseNativeDialog;
QString selectedFilter;
QStringList files = QFileDialog::getOpenFileNames(
this, tr("QFileDialog::getOpenFileNames()"),
openFilesPath,
tr("All Files (*);;Text Files (*.txt)"),
&selectedFilter,
options);
if (files.count()) {
openFilesPath = files[0];
openFileNamesLabel->setText(QString("[%1]").arg(files.join(", ")));
}
}
void Dialog::setSaveFileName()
{
QFileDialog::Options options;
if (!native->isChecked())
options |= QFileDialog::DontUseNativeDialog;
QString selectedFilter;
QString fileName = QFileDialog::getSaveFileName(this,
tr("QFileDialog::getSaveFileName()"),
saveFileNameLabel->text(),
tr("All Files (*);;Text Files (*.txt)"),
&selectedFilter,
options);
if (!fileName.isEmpty())
saveFileNameLabel->setText(fileName);
}
void Dialog::criticalMessage()
{
QMessageBox::StandardButton reply;
reply = QMessageBox::critical(this, tr("QMessageBox::critical()"),
MESSAGE,
QMessageBox::Abort | QMessageBox::Retry | QMessageBox::Ignore);
if (reply == QMessageBox::Abort)
criticalLabel->setText(tr("Abort"));
else if (reply == QMessageBox::Retry)
criticalLabel->setText(tr("Retry"));
else
criticalLabel->setText(tr("Ignore"));
}
void Dialog::informationMessage()
{
QMessageBox::StandardButton reply;
reply = QMessageBox::information(this, tr("QMessageBox::information()"), MESSAGE);
if (reply == QMessageBox::Ok)
informationLabel->setText(tr("OK"));
else
informationLabel->setText(tr("Escape"));
}
void Dialog::questionMessage()
{
QMessageBox::StandardButton reply;
reply = QMessageBox::question(this, tr("QMessageBox::question()"),
MESSAGE,
QMessageBox::Yes | QMessageBox::No | QMessageBox::Cancel);
if (reply == QMessageBox::Yes)
questionLabel->setText(tr("Yes"));
else if (reply == QMessageBox::No)
questionLabel->setText(tr("No"));
else
questionLabel->setText(tr("Cancel"));
}
void Dialog::warningMessage()
{
QMessageBox msgBox(QMessageBox::Warning, tr("QMessageBox::warning()"),
MESSAGE, 0, this);
msgBox.addButton(tr("Save &Again"), QMessageBox::AcceptRole);
msgBox.addButton(tr("&Continue"), QMessageBox::RejectRole);
if (msgBox.exec() == QMessageBox::AcceptRole)
warningLabel->setText(tr("Save Again"));
else
warningLabel->setText(tr("Continue"));
}
void Dialog::errorMessage()
{
errorMessageDialog->showMessage(
tr("This dialog shows and remembers error messages. "
"If the checkbox is checked (as it is by default), "
"the shown message will be shown again, "
"but if the user unchecks the box the message "
"will not appear again if QErrorMessage::showMessage() "
"is called with the same message."));
errorLabel->setText(tr("If the box is unchecked, the message "
"won't appear again."));
}
main.cpp
#include <QApplication>
#include <QTranslator>
#include <QLocale>
#include <QLibraryInfo>
#include "dialog.h"
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QString translatorFileName = QLatin1String("qt_");
translatorFileName += QLocale::system().name();
QTranslator *translator = new QTranslator(&app);
if (translator->load(translatorFileName, QLibraryInfo::location(QLibraryInfo::TranslationsPath)))
app.installTranslator(translator);
Dialog dialog;
return dialog.exec();
}
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