colornamesdialog.cpp

Qt4的一些例子

#include <QtGui>

#include "colornamesdialog.h"

ColorNamesDialog::ColorNamesDialog(QWidget *parent)
    : QDialog(parent)
{
    sourceModel = new QStringListModel(this);
    sourceModel->setStringList(QColor::colorNames());

    proxyModel = new QSortFilterProxyModel(this);
    proxyModel->setSourceModel(sourceModel);
    proxyModel->setFilterKeyColumn(0);

    listView = new QListView;
    listView->setModel(proxyModel);
    listView->setEditTriggers(QAbstractItemView::NoEditTriggers);

    filterLabel = new QLabel(tr("&Filter:"));
    filterLineEdit = new QLineEdit;
    filterLabel->setBuddy(filterLineEdit);

    syntaxLabel = new QLabel(tr("&Pattern syntax:"));
    syntaxComboBox = new QComboBox;
    syntaxComboBox->addItem(tr("Regular expression"), QRegExp::RegExp);
    syntaxComboBox->addItem(tr("Wildcard"), QRegExp::Wildcard);
    syntaxComboBox->addItem(tr("Fixed string"), QRegExp::FixedString);
    syntaxLabel->setBuddy(syntaxComboBox);

    connect(filterLineEdit, SIGNAL(textChanged(const QString &)),
            this, SLOT(reapplyFilter()));
    connect(syntaxComboBox, SIGNAL(currentIndexChanged(int)),
            this, SLOT(reapplyFilter()));

    QGridLayout *mainLayout = new QGridLayout;
    mainLayout->addWidget(listView, 0, 0, 1, 2);
    mainLayout->addWidget(filterLabel, 1, 0);
    mainLayout->addWidget(filterLineEdit, 1, 1);
    mainLayout->addWidget(syntaxLabel, 2, 0);
    mainLayout->addWidget(syntaxComboBox, 2, 1);
    setLayout(mainLayout);

    setWindowTitle(tr("Color Names"));
}

void ColorNamesDialog::reapplyFilter()
{
    QRegExp::PatternSyntax syntax =
            QRegExp::PatternSyntax(syntaxComboBox->itemData(
                    syntaxComboBox->currentIndex()).toInt());
    QRegExp regExp(filterLineEdit->text(), Qt::CaseInsensitive, syntax);
    proxyModel->setFilterRegExp(regExp);
}