QGIS API Documentation 3.27.0-Master (9c08adf5ef)
qgslayoutreportsectionlabel.cpp
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1/***************************************************************************
2 qgslayoutreportsectionlabel.cpp
3 ------------------------
4 begin : January 2018
5 copyright : (C) 2018 by Nyall Dawson
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
19#include "qgslayout.h"
20#include "qgslayoutview.h"
21#include <QGraphicsView>
22#include <QPainter>
23#include <QWidget>
24#include <QBrush>
25
27
28QgsLayoutReportSectionLabel::QgsLayoutReportSectionLabel( QgsLayout *layout, QgsLayoutView *view )
29 : QGraphicsRectItem( nullptr )
30 , mLayout( layout )
31 , mView( view )
32{
33 setCacheMode( QGraphicsItem::DeviceCoordinateCache );
34}
35
36void QgsLayoutReportSectionLabel::paint( QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget )
37{
38 Q_UNUSED( option )
39 Q_UNUSED( widget )
40
41 if ( !mLayout || !mLayout->renderContext().isPreviewRender() )
42 {
43 //don't draw label in outputs
44 return;
45 }
46
47 if ( mLabel.isEmpty() )
48 return;
49
50 QFont f;
51 f.setPointSizeF( 8 );
52 const QFontMetrics fm( f );
53 const QSize s = fm.size( 0, mLabel );
54 const double margin = fm.height() / 5.0;
55
56 const double scaleValue = scale() / painter->transform().m11();
57 const QgsScopedQPainterState painterState( painter );
58 painter->setRenderHint( QPainter::Antialiasing, true );
59 painter->scale( scaleValue, scaleValue );
60 const QRectF r = rect();
61 const QRectF scaledRect( r.left() / scaleValue, r.top() / scaleValue, r.width() / scaleValue, r.height() / scaleValue );
62
63 if ( scaledRect.width() < s.width() + 2 * margin || scaledRect.height() < s.height() + 2 * margin )
64 {
65 // zoomed out too far to fully draw label inside item rect
66 return;
67 }
68
69 const QRectF textRect = QRectF( scaledRect.left() + margin, scaledRect.top() + margin, scaledRect.width() - 2 * margin, scaledRect.height() - 2 * margin );
70 const QRectF boxRect = QRectF( scaledRect.left(), scaledRect.bottom() - ( s.height() + 2 * margin ), s.width() + 2 * margin, s.height() + 2 * margin );
71
72 QPainterPath p;
73 p.moveTo( boxRect.bottomRight() );
74 p.lineTo( boxRect.right(), boxRect.top() + margin );
75 p.arcTo( boxRect.right() - 2 * margin, boxRect.top(), 2 * margin, 2 * margin, 0, 90 );
76 p.lineTo( boxRect.left() + margin, boxRect.top() );
77 p.arcTo( boxRect.left(), boxRect.top(), 2 * margin, 2 * margin, 90, 90 );
78 p.lineTo( boxRect.bottomLeft() );
79 p.lineTo( boxRect.bottomRight() );
80
81 painter->setPen( QColor( 150, 150, 150, 150 ) );
82 QLinearGradient g( 0, boxRect.top(), 0, boxRect.bottom() );
83 g.setColorAt( 0, QColor( 200, 200, 200, 150 ) );
84 g.setColorAt( 1, QColor( 150, 150, 150, 150 ) );
85
86 painter->setBrush( QBrush( g ) );
87 painter->drawPath( p );
88
89 painter->setPen( QPen( QColor( 0, 0, 0, 100 ) ) );
90 painter->setFont( f );
91 painter->drawText( textRect, Qt::AlignBottom, mLabel );
92}
93
94void QgsLayoutReportSectionLabel::setLabel( const QString &label )
95{
96 mLabel = label;
97 update();
98}
99
A graphical widget to display and interact with QgsLayouts.
Definition: qgslayoutview.h:50
Base class for layouts, which can contain items such as maps, labels, scalebars, etc.
Definition: qgslayout.h:51
Scoped object for saving and restoring a QPainter object's state.