KChart

KChartTernaryAxis.cpp
1/*
2 * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
3 *
4 * This file is part of the KD Chart library.
5 *
6 * SPDX-License-Identifier: GPL-2.0-or-later
7 */
8
9#include "KChartTernaryAxis.h"
10
11#include <QPainter>
12
13#include <KChartChart.h>
14#include <KChartPaintContext.h>
15
16#include "TernaryConstants.h"
17#include "KChartTernaryCoordinatePlane.h"
18#include "KChartAbstractTernaryDiagram.h"
19
20
21#include "KChartLayoutItems.h"
22#include "KChartTextLabelCache.h"
23
24using namespace KChart;
25
26// m_label and m_fifty do not have to be pointers, once the class is
27// pimpled (PrerenderedLabel is not published API)
28
29TernaryAxis::TernaryAxis ( AbstractTernaryDiagram* diagram)
30 : AbstractAxis( diagram )
31 , m_position( KChartEnums::PositionUnknown )
32 , m_label( new PrerenderedLabel )
33 , m_fifty( new PrerenderedLabel )
34{
35 resetTitleTextAttributes();
36 setPosition( KChartEnums::PositionSouth ); // arbitrary
37 m_fifty->setText( QObject::tr( "50%" ) ); // const
38 // FIXME is this consistent with other diagram/axis/plane implementations?
39 diagram->addAxis( this );
40}
41
42TernaryAxis::~TernaryAxis()
43{
44 delete m_label; m_label = nullptr;
45 delete m_fifty; m_fifty = nullptr;
46}
47
49{
50 // not used
51}
52
53void TernaryAxis::paint (QPainter *)
54{
55 // not used
56}
57
59{
60 QPainter* p = paintContext->painter();
62 (TernaryCoordinatePlane*) paintContext->coordinatePlane();
63 // QObject* refArea = plane->parent();
64
65 // paint the axis label (across the triangle, that one):
67 labels << m_label << m_fifty;
68 for ( PrerenderedLabel* label : qAsConst(labels) ) {
69 const QPixmap& pixmap = label->pixmap();
70 const QPointF point = plane->translate( label->position() )
71 - label->referencePointLocation();
72 p->drawPixmap( point, pixmap );
73 }
74}
75
76bool TernaryAxis::isEmpty() const
77{
78 // todo: what's this method for?
79 return false;
80}
81
82QRect TernaryAxis::geometry () const
83{
84 return m_geometry;
85}
86
87void TernaryAxis::setGeometry (const QRect &rect)
88{
89 m_geometry = rect;
90}
91
92QSize TernaryAxis::minimumSize () const
93{
94 // todo: return realistic sizes
95 return QSize( 100, 100 );
96}
97
98QSize TernaryAxis::maximumSize () const
99{
100 return QSize( 300, 200 );
101}
102
103QSize TernaryAxis::sizeHint () const
104{
105 return QSize( 150, 100 );
106}
107
108Qt::Orientations TernaryAxis::expandingDirections () const
109{
111}
112
113const Position TernaryAxis::position () const
114{
115 return m_position;
116}
117
118void TernaryAxis::setPosition (Position p)
119{
120 if ( p == position() ) return;
121
122 if ( p != KChartEnums::PositionWest
123 && p != KChartEnums::PositionEast
124 && p != KChartEnums::PositionSouth )
125 {
126 qDebug() << "TernaryAxis::setPosition: only south, east and west are supported "
127 "positions for ternary axes.";
128 return;
129 }
130
131 if ( m_title.isEmpty() )
132 switch ( p.value() ) {
133 case KChartEnums::PositionSouth:
134 m_label->setText( tr( "A" ) );
135 break;
136 case KChartEnums::PositionWest:
137 m_label->setText( tr( "C" ) );
138 break;
139 case KChartEnums::PositionEast:
140 m_label->setText( tr( "B" ) );
141 break;
142 default:
143 break;
144 }
145
146 m_position = p;
147 updatePrerenderedLabels(); // position has changed
148}
149
150void TernaryAxis::setTitleText( const QString& text )
151{
152 m_title = text; // do not remove
153 m_label->setText( text );
154}
155
156QString TernaryAxis::titleText() const
157{
158 return m_label->text();
159}
160
161void TernaryAxis::setTitleTextAttributes( const TextAttributes &a )
162{
163 m_titleAttributes = a;
164 updatePrerenderedLabels();
165}
166
167TextAttributes TernaryAxis::titleTextAttributes() const
168{
169 return m_titleAttributes;
170}
171
172void TernaryAxis::resetTitleTextAttributes()
173{
175 m_titleAttributes = a;
176 updatePrerenderedLabels();
177}
178
179bool TernaryAxis::hasDefaultTitleTextAttributes() const
180{
182 return m_titleAttributes == a;
183}
184
185void TernaryAxis::updatePrerenderedLabels()
186{
187 TextAttributes attributes = titleTextAttributes();
188 qreal axisLabelAngle = 0.0;
189 qreal fiftyMarkAngle = 0.0;
192 KChartEnums::PositionValue fiftyMarkReferencePoint = KChartEnums::PositionUnknown;
193
194 switch ( position().value() ) {
195 case KChartEnums::PositionSouth:
196 // this is the axis on the other side of A
197 axisLabelAngle = 0.0;
198 fiftyMarkAngle = 0.0;
199 axisLabelPosition = TriangleTop;
200 fiftyMarkPosition = 0.5 * AxisVector_B_C - RelMarkerLength * Norm_B_C;
201 fiftyMarkReferencePoint = KChartEnums::PositionNorth;
202 break;
203 case KChartEnums::PositionEast:
204 // this is the axis on the other side of B
205 axisLabelAngle = 240.0;
206 fiftyMarkAngle = 60;
207 axisLabelPosition = TriangleBottomLeft;
208 fiftyMarkPosition = AxisVector_B_C + 0.5 * AxisVector_C_A - RelMarkerLength * Norm_C_A;
209 fiftyMarkReferencePoint = KChartEnums::PositionSouth;
210 break;
211 case KChartEnums::PositionWest:
212 // this is the axis on the other side of C
213 axisLabelAngle = 120.0;
214 fiftyMarkAngle = 300.0;
215 axisLabelPosition = TriangleBottomRight;
216 fiftyMarkPosition = 0.5 * AxisVector_B_A + RelMarkerLength * Norm_B_A;
217 fiftyMarkReferencePoint = KChartEnums::PositionSouth;
218 break;
219 case KChartEnums::PositionUnknown:
220 break; // initial value
221 default:
222 qDebug() << "TernaryAxis::updatePrerenderedLabel: unknown location";
223 };
224
225 m_label->setFont( attributes.font() );
226 // m_label->setText( titleText() ); // done by setTitleText()
227 m_label->setAngle( axisLabelAngle );
228 m_label->setPosition( axisLabelPosition );
229 m_label->setReferencePoint( KChartEnums::PositionSouth );
230 QFont font = attributes.font();
231 font.setPointSizeF( 0.85 * font.pointSizeF() );
232 m_fifty->setFont( font );
233 m_fifty->setAngle( fiftyMarkAngle );
234 m_fifty->setPosition( fiftyMarkPosition );
236}
237
238QPair<QSizeF, QSizeF> TernaryAxis::requiredMargins() const
239{
240 QSizeF topleft( 0.0, 0.0 );
241 QSizeF bottomRight( 0.0, 0.0 );
242
243 switch ( position().value() ) {
244 case KChartEnums::PositionSouth:
245 // the label of the south axis is, in fact, up north.
246 topleft.setHeight( m_label->pixmap().height() );
247 bottomRight.setHeight( m_fifty->pixmap().height() );
248 break;
249 case KChartEnums::PositionWest:
250 bottomRight.setWidth( m_label->pixmap().width()
251 - m_label->referencePointLocation().x() );
252 bottomRight.setHeight( m_label->pixmap().height()
253 - m_label->referencePointLocation().y() );
254 break;
255 case KChartEnums::PositionEast:
256 topleft.setWidth( m_label->pixmap().width()
257 - ( m_label->pixmap().width()
258 - m_label->referencePointLocation().x() ) );
259 bottomRight.setHeight( m_label->pixmap().height()
260 - ( m_label->pixmap().height()
261 - m_label->referencePointLocation().y() ) );
262 break;
263 default:
264 qDebug() << "TernaryAxis::requiredMargins: unknown location";
265 }
266// qDebug() << "TernaryAxis::requiredMargins:" << topleft << bottomRight;
267 return QPair<QSizeF, QSizeF>( topleft, bottomRight );
268}
Project global class providing some enums needed both by KChartParams and by KChartCustomBox.
Definition KChartEnums.h:27
PositionValue
Numerical values of the static KChart::Position instances, for using a Position::value() with a switc...
The base class for axes.
QStringList labels() const
Returns a list of strings, that are used as axis labels, as set via setLabels.
Base class for diagrams based on a ternary coordinate plane.
Stores information about painting diagrams.
Defines a position, using compass terminology.
KChartEnums::PositionValue value() const
Returns an integer value corresponding to this Position.
void paintAll(QPainter &) override
Call paintAll, if you want the background and the frame to be drawn before the normal paint() is invo...
void paintCtx(PaintContext *) override
Default impl: Paint the complete item using its layouted position and size.
const QPointF translate(const QPointF &diagramPoint) const override
Translate the given point in value space coordinates to a position in pixel space.
A set of text attributes.
void setPosition(const QPointF &position)
Set the position of the element.
void setReferencePoint(KChartEnums::PositionValue)
Set the reference point of the element.
PrerenderedLabel is an internal KChart class that simplifies creation and caching of cached text labe...
void setAngle(qreal angle)
Sets the angle of the label to angle degrees.
const QString & text() const
void setFont(const QFont &font)
Sets the label's font to font.
const QPixmap & pixmap() const override
Returns the rendered element.
QPointF referencePointLocation(KChartEnums::PositionValue position) const override
Return the location of the reference point relatively to the pixmap's origin.
void setText(const QString &text)
Sets the label's text to text.
qreal pointSizeF() const const
void setPointSizeF(qreal pointSize)
T qobject_cast(QObject *object)
QString tr(const char *sourceText, const char *disambiguation, int n)
void drawPixmap(const QPoint &point, const QPixmap &pixmap)
int height() const const
int width() const const
qreal x() const const
qreal y() const const
bool isEmpty() const const
typedef Orientations
This file is part of the KDE documentation.
Documentation copyright © 1996-2024 The KDE developers.
Generated on Fri Jun 21 2024 12:03:49 by doxygen 1.10.0 written by Dimitri van Heesch, © 1997-2006

KDE's Doxygen guidelines are available online.