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-rw-r--r--src/gui/doc/snippets/plaintextlayout/window.cpp99
1 files changed, 47 insertions, 52 deletions
diff --git a/src/gui/doc/snippets/plaintextlayout/window.cpp b/src/gui/doc/snippets/plaintextlayout/window.cpp
index 9bc4df05f1..36c061635e 100644
--- a/src/gui/doc/snippets/plaintextlayout/window.cpp
+++ b/src/gui/doc/snippets/plaintextlayout/window.cpp
@@ -47,72 +47,67 @@
** $QT_END_LICENSE$
**
****************************************************************************/
+#include <QPainter>
+#include <QTextLayout>
+#include <QWidget>
-#include <QtGui>
-#include <math.h>
-
-#include "window.h"
-
-Window::Window(QWidget *parent)
- : QWidget(parent)
+namespace plaintextlayout {
+class Window : public QWidget
{
- text = QString("Support for text rendering and layout in Qt 4 has been "
- "redesigned around a system that allows textual content to "
- "be represented in a more flexible way than was possible "
- "with Qt 3. Qt 4 also provides a more convenient "
- "programming interface for editing documents. These "
- "improvements are made available through a reimplementation "
- "of the existing text rendering engine, and the "
- "introduction of several new classes. "
- "See the relevant module overview for a detailed discussion "
- "of this framework. The following sections provide a brief "
- "overview of the main concepts behind Scribe.");
+protected:
+ void paintEvent(QPaintEvent *event) override;
- setWindowTitle(tr("Plain Text Layout"));
-}
+private:
+ QFont font;
+ QString text;
+};
void Window::paintEvent(QPaintEvent *event)
{
+
//! [0]
- QTextLayout textLayout(text, font);
- qreal margin = 10;
- qreal radius = qMin(width()/2.0, height()/2.0) - margin;
- QFontMetrics fm(font);
+QTextLayout textLayout(text, font);
+qreal margin = 10;
+qreal radius = qMin(width()/2.0, height()/2.0) - margin;
+QFontMetrics fm(font);
- qreal lineHeight = fm.height();
- qreal y = 0;
+qreal lineHeight = fm.height();
+qreal y = 0;
- textLayout.beginLayout();
+textLayout.beginLayout();
- while (1) {
- // create a new line
- QTextLine line = textLayout.createLine();
- if (!line.isValid())
- break;
+while (1) {
+ // create a new line
+ QTextLine line = textLayout.createLine();
+ if (!line.isValid())
+ break;
- qreal x1 = qMax(0.0, pow(pow(radius,2)-pow(radius-y,2), 0.5));
- qreal x2 = qMax(0.0, pow(pow(radius,2)-pow(radius-(y+lineHeight),2), 0.5));
- qreal x = qMax(x1, x2) + margin;
- qreal lineWidth = (width() - margin) - x;
+ qreal x1 = qMax(0.0, pow(pow(radius,2)-pow(radius-y,2), 0.5));
+ qreal x2 = qMax(0.0, pow(pow(radius,2)-pow(radius-(y+lineHeight),2), 0.5));
+ qreal x = qMax(x1, x2) + margin;
+ qreal lineWidth = (width() - margin) - x;
- line.setLineWidth(lineWidth);
- line.setPosition(QPointF(x, margin+y));
- y += line.height();
- }
+ line.setLineWidth(lineWidth);
+ line.setPosition(QPointF(x, margin+y));
+ y += line.height();
+}
- textLayout.endLayout();
+textLayout.endLayout();
- QPainter painter;
- painter.begin(this);
- painter.setRenderHint(QPainter::Antialiasing);
- painter.fillRect(rect(), Qt::white);
- painter.setBrush(QBrush(Qt::black));
- painter.setPen(QPen(Qt::black));
- textLayout.draw(&painter, QPoint(0,0));
+QPainter painter;
+painter.begin(this);
+painter.setRenderHint(QPainter::Antialiasing);
+painter.fillRect(rect(), Qt::white);
+painter.setBrush(QBrush(Qt::black));
+painter.setPen(QPen(Qt::black));
+textLayout.draw(&painter, QPoint(0,0));
- painter.setBrush(QBrush(QColor("#a6ce39")));
- painter.setPen(QPen(Qt::black));
- painter.drawEllipse(QRectF(-radius, margin, 2*radius, 2*radius));
- painter.end();
+painter.setBrush(QBrush(QColor("#a6ce39")));
+painter.setPen(QPen(Qt::black));
+painter.drawEllipse(QRectF(-radius, margin, 2*radius, 2*radius));
+painter.end();
//! [0]
+
+Q_UNUSED(event);
}
+} // plaintextlayout