Polish charactermap example
- Use Qt 5 connection syntax. - Introduce helper function to calculate the square size, remove the existing 24 pixel limitation since that makes it impossible to render 20pt fonts. - Add filter chooser for font filters. - Add menu and info dialog showing DPI and default fonts. - Streamline code Change-Id: I0cd4d0475b5a7ed3c475de7a413abebbe688dfe2 Reviewed-by: Topi Reiniö <topi.reinio@theqtcompany.com>
This commit is contained in:
Friedemann Kleint
parent
879fd5bb5c
commit
9b1db44c2a
@ -44,11 +44,9 @@
|
||||
|
||||
//! [0]
|
||||
CharacterWidget::CharacterWidget(QWidget *parent)
|
||||
: QWidget(parent)
|
||||
: QWidget(parent), columns(16), lastKey(-1)
|
||||
{
|
||||
squareSize = 24;
|
||||
columns = 16;
|
||||
lastKey = -1;
|
||||
calculateSquareSize();
|
||||
setMouseTracking(true);
|
||||
}
|
||||
//! [0]
|
||||
@ -57,7 +55,7 @@ CharacterWidget::CharacterWidget(QWidget *parent)
|
||||
void CharacterWidget::updateFont(const QFont &font)
|
||||
{
|
||||
displayFont.setFamily(font.family());
|
||||
squareSize = qMax(24, QFontMetrics(displayFont).xHeight() * 3);
|
||||
calculateSquareSize();
|
||||
adjustSize();
|
||||
update();
|
||||
}
|
||||
@ -67,7 +65,7 @@ void CharacterWidget::updateFont(const QFont &font)
|
||||
void CharacterWidget::updateSize(const QString &fontSize)
|
||||
{
|
||||
displayFont.setPointSize(fontSize.toInt());
|
||||
squareSize = qMax(24, QFontMetrics(displayFont).xHeight() * 3);
|
||||
calculateSquareSize();
|
||||
adjustSize();
|
||||
update();
|
||||
}
|
||||
@ -79,7 +77,7 @@ void CharacterWidget::updateStyle(const QString &fontStyle)
|
||||
const QFont::StyleStrategy oldStrategy = displayFont.styleStrategy();
|
||||
displayFont = fontDatabase.font(displayFont.family(), fontStyle, displayFont.pointSize());
|
||||
displayFont.setStyleStrategy(oldStrategy);
|
||||
squareSize = qMax(24, QFontMetrics(displayFont).xHeight() * 3);
|
||||
calculateSquareSize();
|
||||
adjustSize();
|
||||
update();
|
||||
}
|
||||
@ -94,6 +92,11 @@ void CharacterWidget::updateFontMerging(bool enable)
|
||||
update();
|
||||
}
|
||||
|
||||
void CharacterWidget::calculateSquareSize()
|
||||
{
|
||||
squareSize = qMax(16, 4 + QFontMetrics(displayFont, this).height());
|
||||
}
|
||||
|
||||
//! [3]
|
||||
QSize CharacterWidget::sizeHint() const
|
||||
{
|
||||
|
||||
@ -76,6 +76,8 @@ protected:
|
||||
void paintEvent(QPaintEvent *event) Q_DECL_OVERRIDE;
|
||||
|
||||
private:
|
||||
void calculateSquareSize();
|
||||
|
||||
QFont displayFont;
|
||||
int columns;
|
||||
int lastKey;
|
||||
|
||||
@ -44,10 +44,30 @@
|
||||
#include "mainwindow.h"
|
||||
|
||||
//! [0]
|
||||
|
||||
Q_DECLARE_METATYPE(QFontComboBox::FontFilter)
|
||||
|
||||
MainWindow::MainWindow()
|
||||
{
|
||||
QMenu *fileMenu = menuBar()->addMenu(tr("File"));
|
||||
fileMenu->addAction(tr("Quit"), this, &QWidget::close);
|
||||
QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
|
||||
helpMenu->addAction(tr("Show Font Info"), this, &MainWindow::showInfo);
|
||||
helpMenu->addAction(tr("About &Qt"), qApp, &QApplication::aboutQt);
|
||||
|
||||
QWidget *centralWidget = new QWidget;
|
||||
|
||||
QLabel *filterLabel = new QLabel(tr("Filter:"));
|
||||
filterCombo = new QComboBox;
|
||||
filterCombo->addItem(tr("All"), QVariant::fromValue(QFontComboBox::AllFonts));
|
||||
filterCombo->addItem(tr("Scalable"), QVariant::fromValue(QFontComboBox::ScalableFonts));
|
||||
filterCombo->addItem(tr("Monospaced"), QVariant::fromValue(QFontComboBox::MonospacedFonts));
|
||||
filterCombo->addItem(tr("Proportional"), QVariant::fromValue(QFontComboBox::ProportionalFonts));
|
||||
filterCombo->setCurrentIndex(0);
|
||||
typedef void (QComboBox::*QComboBoxIntSignal)(int);
|
||||
connect(filterCombo, static_cast<QComboBoxIntSignal>(&QComboBox::currentIndexChanged),
|
||||
this, &MainWindow::filterChanged);
|
||||
|
||||
QLabel *fontLabel = new QLabel(tr("Font:"));
|
||||
fontCombo = new QFontComboBox;
|
||||
QLabel *sizeLabel = new QLabel(tr("Size:"));
|
||||
@ -70,38 +90,39 @@ MainWindow::MainWindow()
|
||||
|
||||
//! [2]
|
||||
lineEdit = new QLineEdit;
|
||||
lineEdit->setClearButtonEnabled(true);
|
||||
#ifndef QT_NO_CLIPBOARD
|
||||
QPushButton *clipboardButton = new QPushButton(tr("&To clipboard"));
|
||||
//! [2]
|
||||
|
||||
//! [3]
|
||||
clipboard = QApplication::clipboard();
|
||||
//! [3]
|
||||
#endif
|
||||
|
||||
//! [4]
|
||||
connect(fontCombo, SIGNAL(currentFontChanged(QFont)),
|
||||
this, SLOT(findStyles(QFont)));
|
||||
connect(fontCombo, SIGNAL(currentFontChanged(QFont)),
|
||||
this, SLOT(findSizes(QFont)));
|
||||
connect(fontCombo, SIGNAL(currentFontChanged(QFont)),
|
||||
characterWidget, SLOT(updateFont(QFont)));
|
||||
connect(sizeCombo, SIGNAL(currentIndexChanged(QString)),
|
||||
characterWidget, SLOT(updateSize(QString)));
|
||||
connect(styleCombo, SIGNAL(currentIndexChanged(QString)),
|
||||
characterWidget, SLOT(updateStyle(QString)));
|
||||
connect(fontCombo, &QFontComboBox::currentFontChanged,
|
||||
this, &MainWindow::findStyles);
|
||||
connect(fontCombo, &QFontComboBox::currentFontChanged,
|
||||
this, &MainWindow::findSizes);
|
||||
connect(fontCombo, &QFontComboBox::currentFontChanged,
|
||||
characterWidget, &CharacterWidget::updateFont);
|
||||
typedef void (QComboBox::*QComboBoxStringSignal)(const QString &);
|
||||
connect(sizeCombo, static_cast<QComboBoxStringSignal>(&QComboBox::currentIndexChanged),
|
||||
characterWidget, &CharacterWidget::updateSize);
|
||||
connect(styleCombo, static_cast<QComboBoxStringSignal>(&QComboBox::currentIndexChanged),
|
||||
characterWidget, &CharacterWidget::updateStyle);
|
||||
//! [4] //! [5]
|
||||
connect(characterWidget, SIGNAL(characterSelected(QString)),
|
||||
this, SLOT(insertCharacter(QString)));
|
||||
connect(characterWidget, &CharacterWidget::characterSelected,
|
||||
this, &MainWindow::insertCharacter);
|
||||
|
||||
#ifndef QT_NO_CLIPBOARD
|
||||
connect(clipboardButton, SIGNAL(clicked()), this, SLOT(updateClipboard()));
|
||||
connect(clipboardButton, &QAbstractButton::clicked, this, &MainWindow::updateClipboard);
|
||||
#endif
|
||||
//! [5]
|
||||
connect(fontMerging, SIGNAL(toggled(bool)), characterWidget, SLOT(updateFontMerging(bool)));
|
||||
connect(fontMerging, &QAbstractButton::toggled, characterWidget, &CharacterWidget::updateFontMerging);
|
||||
|
||||
//! [6]
|
||||
QHBoxLayout *controlsLayout = new QHBoxLayout;
|
||||
controlsLayout->addWidget(filterLabel);
|
||||
controlsLayout->addWidget(filterCombo, 1);
|
||||
controlsLayout->addWidget(fontLabel);
|
||||
controlsLayout->addWidget(fontCombo, 1);
|
||||
controlsLayout->addWidget(sizeLabel);
|
||||
@ -153,6 +174,14 @@ void MainWindow::findStyles(const QFont &font)
|
||||
}
|
||||
//! [8]
|
||||
|
||||
void MainWindow::filterChanged(int f)
|
||||
{
|
||||
const QFontComboBox::FontFilter filter =
|
||||
filterCombo->itemData(f).value<QFontComboBox::FontFilter>();
|
||||
fontCombo->setFontFilters(filter);
|
||||
statusBar()->showMessage(tr("%n font(s) found", 0, fontCombo->count()));
|
||||
}
|
||||
|
||||
void MainWindow::findSizes(const QFont &font)
|
||||
{
|
||||
QFontDatabase fontDatabase;
|
||||
@ -198,9 +227,63 @@ void MainWindow::insertCharacter(const QString &character)
|
||||
void MainWindow::updateClipboard()
|
||||
{
|
||||
//! [11]
|
||||
clipboard->setText(lineEdit->text(), QClipboard::Clipboard);
|
||||
QGuiApplication::clipboard()->setText(lineEdit->text(), QClipboard::Clipboard);
|
||||
//! [11]
|
||||
clipboard->setText(lineEdit->text(), QClipboard::Selection);
|
||||
QGuiApplication::clipboard()->setText(lineEdit->text(), QClipboard::Selection);
|
||||
}
|
||||
#endif
|
||||
|
||||
class FontInfoDialog : public QDialog
|
||||
{
|
||||
public:
|
||||
explicit FontInfoDialog(QWidget *parent = Q_NULLPTR);
|
||||
|
||||
private:
|
||||
QString text() const;
|
||||
};
|
||||
|
||||
FontInfoDialog::FontInfoDialog(QWidget *parent) : QDialog(parent)
|
||||
{
|
||||
setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
|
||||
QVBoxLayout *mainLayout = new QVBoxLayout(this);
|
||||
QPlainTextEdit *textEdit = new QPlainTextEdit(text(), this);
|
||||
textEdit->setReadOnly(true);
|
||||
textEdit->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
|
||||
mainLayout->addWidget(textEdit);
|
||||
QDialogButtonBox *buttonBox = new QDialogButtonBox(QDialogButtonBox::Close, this);
|
||||
connect(buttonBox, &QDialogButtonBox::rejected, this, &QDialog::reject);
|
||||
mainLayout->addWidget(buttonBox);
|
||||
}
|
||||
|
||||
QString FontInfoDialog::text() const
|
||||
{
|
||||
QString text;
|
||||
QTextStream str(&text);
|
||||
const QFont defaultFont = QFontDatabase::systemFont(QFontDatabase::GeneralFont);
|
||||
const QFont fixedFont = QFontDatabase::systemFont(QFontDatabase::FixedFont);
|
||||
const QFont titleFont = QFontDatabase::systemFont(QFontDatabase::TitleFont);
|
||||
const QFont smallestReadableFont = QFontDatabase::systemFont(QFontDatabase::SmallestReadableFont);
|
||||
|
||||
str << "Qt " << QT_VERSION_STR << " on " << QGuiApplication::platformName()
|
||||
<< ", " << logicalDpiX() << "DPI";
|
||||
if (!qFuzzyCompare(devicePixelRatioF(), qreal(1)))
|
||||
str << ", device pixel ratio: " << devicePixelRatioF();
|
||||
str << "\n\nDefault font : " << defaultFont.family() << ", " << defaultFont.pointSizeF() << "pt\n"
|
||||
<< "Fixed font : " << fixedFont.family() << ", " << fixedFont.pointSizeF() << "pt\n"
|
||||
<< "Title font : " << titleFont.family() << ", " << titleFont.pointSizeF() << "pt\n"
|
||||
<< "Smallest font: " << smallestReadableFont.family() << ", " << smallestReadableFont.pointSizeF() << "pt\n";
|
||||
|
||||
return text;
|
||||
}
|
||||
|
||||
void MainWindow::showInfo()
|
||||
{
|
||||
const QRect screenGeometry = QApplication::desktop()->screenGeometry(this);
|
||||
FontInfoDialog *dialog = new FontInfoDialog(this);
|
||||
dialog->setWindowTitle(tr("Fonts"));
|
||||
dialog->setAttribute(Qt::WA_DeleteOnClose);
|
||||
dialog->resize(screenGeometry.width() / 4, screenGeometry.height() / 4);
|
||||
dialog->show();
|
||||
}
|
||||
|
||||
//! [10]
|
||||
|
||||
@ -63,18 +63,18 @@ public:
|
||||
MainWindow();
|
||||
|
||||
public slots:
|
||||
void filterChanged(int);
|
||||
void findStyles(const QFont &font);
|
||||
void findSizes(const QFont &font);
|
||||
void insertCharacter(const QString &character);
|
||||
#ifndef QT_NO_CLIPBOARD
|
||||
void updateClipboard();
|
||||
#endif
|
||||
void showInfo();
|
||||
|
||||
private:
|
||||
CharacterWidget *characterWidget;
|
||||
#ifndef QT_NO_CLIPBOARD
|
||||
QClipboard *clipboard;
|
||||
#endif
|
||||
QComboBox *filterCombo;
|
||||
QComboBox *styleCombo;
|
||||
QComboBox *sizeCombo;
|
||||
QFontComboBox *fontCombo;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user