5.11 实例：颜色对话框.txt

qt的源代码

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::show&M&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()));
    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);
    setLayout(layout);
    setWindowTitle(tr("Standard Dialogs"));
}
void Dialog::setInteger()
{
    bool ok;
    int i = QInputDialog::getInteger(this, tr("QInputDialog::getInteger()"),
                                     tr("Percentage:"), 25, 0, 100, 1, &ok);
    if (ok)
integerLabel->setText(tr("%1%").arg(i));
}
void Dialog::setDouble()
{
    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));
}
void Dialog::setItem()
{
    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);
}
void Dialog::setText()
{
    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);
}
void Dialog::setColor()
{
    QColor color = QColorDialog::getColor(Qt::green, this);
    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()
{
    QString directory = QFileDialog::getExistingDirectory(this,
                                tr("QFileDialog::getExistingDirectory()"),
                                directoryLabel->text(),
                                QFileDialog::DontResolveSymlinks
                                | QFileDialog::ShowDirsOnly);
    if (!directory.isEmpty())
        directoryLabel->setText(directory);
}
void Dialog::setOpenFileName()
{
    QString fileName = QFileDialog::getOpenFileName(this,
                                tr("QFileDialog::getOpenFileName()"),
                                openFileNameLabel->text(),
                                tr("All Files (*);;Text Files (*.txt)"));
    if (!fileName.isEmpty())
        openFileNameLabel->setText(fileName);
}
void Dialog::setOpenFileNames()
{
    QStringList files = QFileDialog::getOpenFileNames(
                                this, tr("QFileDialog::getOpenFileNames()"),
                                openFilesPath,
                                tr("All Files (*);;Text Files (*.txt)"));
    if (files.count()) {
        openFilesPath = files[0];
        openFileNamesLabel->setText(QString("[%1]").arg(files.join(", ")));
    }
}
void Dialog::setSaveFileName()
{
    QString fileName = QFileDialog::getSaveFileName(this,
                                tr("QFileDialog::getSaveFileName()"),
                                saveFileNameLabel->text(),
                                tr("All Files (*);;Text Files (*.txt)"));
    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."));
}
#include <QApplication>
#include "dialog.h"
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Dialog dialog;
    return dialog.exec();
}