QGIS API Documentation  3.26.3-Buenos Aires (65e4edfdad)
qgsproxystyle.cpp
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1 /***************************************************************************
2  qgsproxystyle.cpp
3  -----------------
4  Date : March 2018
5  Copyright : (C) 2018 by Nyall Dawson
6  Email : nyall dot dawson at gmail dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #include "qgsproxystyle.h"
17 #include "qgsimageoperation.h"
18 #include "qgis.h"
19 #include <QStyleFactory>
20 #include <QStyle>
21 #include <QStyleOption>
22 #include <QApplication>
23 #include <QWindow>
24 
25 QgsProxyStyle::QgsProxyStyle( QWidget *parent )
26  : QProxyStyle( nullptr ) // no base style yet - it transfers ownership, so we need a NEW QStyle object for the base style
27 {
28  // get application style
29  const QString appStyle = QApplication::style()->objectName();
30  if ( appStyle == QLatin1String( "QgsAppStyle" ) )
31  {
32  setBaseStyle( static_cast< QgsAppStyle * >( QApplication::style() )->clone() );
33  }
34  else if ( !appStyle.isEmpty() )
35  {
36  if ( QStyle *style = QStyleFactory::create( appStyle ) )
37  setBaseStyle( style );
38  }
39 
40  // set lifetime to match parent widget's
41  setParent( parent );
42 }
43 
45 
46 //
47 // QgsAppStyle
48 //
49 
50 QgsAppStyle::QgsAppStyle( const QString &base )
51  : QProxyStyle( nullptr ) // no base style yet - it transfers ownership, so we need a NEW QStyle object for the base style
52  , mBaseStyle( base )
53 {
54  if ( !mBaseStyle.isEmpty() )
55  {
56  if ( QStyle *style = QStyleFactory::create( mBaseStyle ) )
57  setBaseStyle( style );
58  }
59 
60  setObjectName( QStringLiteral( "QgsAppStyle" ) );
61 }
62 
63 QPixmap QgsAppStyle::generatedIconPixmap( QIcon::Mode iconMode, const QPixmap &pixmap, const QStyleOption *opt ) const
64 {
65  switch ( iconMode )
66  {
67  case QIcon::Disabled:
68  {
69  if ( !pixmap.isNull() )
70  {
71  // override disabled icon style, with something which works better across different light/dark themes.
72  // the default Qt style here only works nicely for light themes.
73  QImage im = pixmap.toImage().convertToFormat( QImage::Format_ARGB32 );
76  return QPixmap::fromImage( im );
77  }
78  return pixmap;
79  }
80 
81  case QIcon::Normal:
82  case QIcon::Active:
83  case QIcon::Selected:
84  return pixmap;
85  }
86 
87  return QProxyStyle::generatedIconPixmap( iconMode, pixmap, opt );
88 }
89 
90 void QgsAppStyle::polish( QWidget *widget )
91 {
92  QProxyStyle::polish( widget );
93 #if defined(Q_OS_UNIX) && !defined(Q_OS_ANDROID)
94  if ( mBaseStyle.contains( QLatin1String( "fusion" ), Qt::CaseInsensitive )
95  || mBaseStyle.contains( QLatin1String( "adwaita" ), Qt::CaseInsensitive ) )
96  {
97  // fix broken inactive window coloring applying to unfocused docks or list/tree widgets
98  // see eg https://github.com/FedoraQt/adwaita-qt/issues/126
99  // the detection used by themes to determine if a widget belongs to an activated window is fragile, which
100  // results in unfocused list/tree views or widget children being shown in the "deactivated window" palette coloring.
101  // Gnome (adwaita) defaults to a coloring which makes widgets looks disabled in this inactive state.
102  // So the best we can do here is force disable the inactive palette coloring to prevent this unwanted behavior.
103  QPalette pal = widget->palette();
104  pal.setColor( QPalette::Inactive, QPalette::Text, pal.color( QPalette::Active, QPalette::Text ) );
105  pal.setColor( QPalette::Inactive, QPalette::Window, pal.color( QPalette::Active, QPalette::Window ) );
106  pal.setColor( QPalette::Inactive, QPalette::WindowText, pal.color( QPalette::Active, QPalette::WindowText ) );
107  pal.setColor( QPalette::Inactive, QPalette::Button, pal.color( QPalette::Active, QPalette::Button ) );
108  pal.setColor( QPalette::Inactive, QPalette::ButtonText, pal.color( QPalette::Active, QPalette::ButtonText ) );
109  widget->setPalette( pal );
110  }
111 #endif
112 }
113 
114 QProxyStyle *QgsAppStyle::clone()
115 {
116  return new QgsAppStyle( mBaseStyle );
117 }
118 
qgsproxystyle.h
qgis.h
qgsimageoperation.h
pal
Definition: qgsdiagramrenderer.h:50
QgsImageOperation::adjustHueSaturation
static void adjustHueSaturation(QImage &image, double saturation, const QColor &colorizeColor=QColor(), double colorizeStrength=1.0, QgsFeedback *feedback=nullptr)
Alter the hue or saturation of a QImage.
Definition: qgsimageoperation.cpp:280
QgsProxyStyle::QgsProxyStyle
QgsProxyStyle(QWidget *parent)
Constructor for QgsProxyStyle.
Definition: qgsproxystyle.cpp:25
QgsImageOperation::multiplyOpacity
static void multiplyOpacity(QImage &image, double factor, QgsFeedback *feedback=nullptr)
Multiplies opacity of image pixel values by a factor.
Definition: qgsimageoperation.cpp:335