QGIS API Documentation  3.27.0-Master (bef583a8ef)
qgsmenuheader.cpp
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1 /***************************************************************************
2  qgsmenuheader.cpp
3  -----------------
4  begin : June 2017
5  copyright : (C) 2017 by Nyall Dawson
6  email : nyall dot dawson at gmail dot com
7  ***************************************************************************/
8 
9 /***************************************************************************
10  * *
11  * This program is free software; you can redistribute it and/or modify *
12  * it under the terms of the GNU General Public License as published by *
13  * the Free Software Foundation; either version 2 of the License, or *
14  * (at your option) any later version. *
15  * *
16  ***************************************************************************/
17 
18 #include "qgsmenuheader.h"
19 #include "qgis.h"
20 #include <QPainter>
21 #include <QApplication>
22 
23 QgsMenuHeader::QgsMenuHeader( const QString &text, QWidget *parent )
24  : QWidget( parent )
25  , mText( text )
26 {
27  const int textMinWidth = fontMetrics().boundingRect( mText ).width();
28  mTextHeight = fontMetrics().height();
29  mLabelMargin = Qgis::UI_SCALE_FACTOR * fontMetrics().horizontalAdvance( '.' );
30  mMinWidth = 2 * mLabelMargin + textMinWidth;
31  setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Fixed );
32  updateGeometry();
33 }
34 
36 {
37  return QSize( mMinWidth, mTextHeight + mLabelMargin );
38 }
39 
41 {
42  return QSize( mMinWidth, mTextHeight + mLabelMargin );
43 }
44 
45 void QgsMenuHeader::paintEvent( QPaintEvent * )
46 {
47  QPainter painter( this );
48  const QPalette pal = QPalette( qApp->palette() );
49  const QColor headerBgColor = pal.color( QPalette::Mid );
50  const QColor headerTextColor = pal.color( QPalette::BrightText );
51 
52  //draw header background
53  painter.setBrush( headerBgColor );
54  painter.setPen( Qt::NoPen );
55  painter.drawRect( QRect( 0, 0, width(), mTextHeight + mLabelMargin ) );
56 
57  //draw header text
58  painter.setPen( headerTextColor );
59  painter.drawText( QPoint( mLabelMargin, 0.25 * mLabelMargin + mTextHeight ), mText );
60  painter.end();
61 }
62 
63 QgsMenuHeaderWidgetAction::QgsMenuHeaderWidgetAction( const QString &text, QObject *parent )
64  : QWidgetAction( parent )
65 {
66  QgsMenuHeader *w = new QgsMenuHeader( text, nullptr );
67  setDefaultWidget( w ); //transfers ownership
68 }
static const double UI_SCALE_FACTOR
UI scaling factor.
Definition: qgis.h:2039
QgsMenuHeaderWidgetAction(const QString &text, QObject *parent=nullptr)
Constructor for QgsMenuHeaderWidgetAction, showing the specified text.
Custom widget for displaying subheaders within a QMenu in a standard style.
Definition: qgsmenuheader.h:33
void paintEvent(QPaintEvent *event) override
QgsMenuHeader(const QString &text, QWidget *parent=nullptr)
Constructor for QgsMenuHeader, showing the specified text.
QSize sizeHint() const override
QSize minimumSizeHint() const override