/
qgspalettedrendererwidget.cpp
106 lines (95 loc) · 3.66 KB
/
qgspalettedrendererwidget.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
/***************************************************************************
qgspalettedrendererwidget.cpp
-----------------------------
begin : February 2012
copyright : (C) 2012 by Marco Hugentobler
email : marco at sourcepole dot ch
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgspalettedrendererwidget.h"
#include "qgspalettedrasterrenderer.h"
#include "qgsrasterlayer.h"
#include <QColorDialog>
QgsPalettedRendererWidget::QgsPalettedRendererWidget( QgsRasterLayer* layer ): QgsRasterRendererWidget( layer )
{
setupUi( this );
if ( mRasterLayer )
{
QgsRasterDataProvider* provider = mRasterLayer->dataProvider();
if ( !provider )
{
return;
}
//fill available bands into combo box
int nBands = provider->bandCount();
for ( int i = 1; i <= nBands; ++i ) //band numbering seem to start at 1
{
mBandComboBox->addItem( provider->colorInterpretationName( i ), i );
}
setFromRenderer( mRasterLayer->renderer() );
}
}
QgsPalettedRendererWidget::~QgsPalettedRendererWidget()
{
}
QgsRasterRenderer* QgsPalettedRendererWidget::renderer()
{
int nColors = mTreeWidget->topLevelItemCount();
QColor* colorArray = new QColor[nColors];
for ( int i = 0; i < nColors; ++i )
{
colorArray[i] = mTreeWidget->topLevelItem( i )->background( 1 ).color();
}
int bandNumber = mBandComboBox->itemData( mBandComboBox->currentIndex() ).toInt();
return new QgsPalettedRasterRenderer( mRasterLayer->dataProvider(), bandNumber, colorArray, nColors );
}
void QgsPalettedRendererWidget::on_mTreeWidget_itemDoubleClicked( QTreeWidgetItem * item, int column )
{
if ( column == 1 && item ) //change item color
{
QColor c = QColorDialog::getColor( item->background( column ).color() );
if ( c.isValid() )
{
item->setBackground( column, QBrush( c ) );
}
}
}
void QgsPalettedRendererWidget::setFromRenderer( const QgsRasterRenderer* r )
{
const QgsPalettedRasterRenderer* pr = dynamic_cast<const QgsPalettedRasterRenderer*>( r );
if ( pr )
{
//read values and colors and fill into tree widget
int nColors = pr->nColors();
QColor* colors = pr->colors();
for ( int i = 0; i < nColors; ++i )
{
QTreeWidgetItem* item = new QTreeWidgetItem( mTreeWidget );
item->setText( 0, QString::number( i ) );
item->setBackground( 1, QBrush( colors[i] ) );
}
delete[] colors;
}
else
{
//read default palette settings from layer
QList<QgsColorRampShader::ColorRampItem>* itemList =
mRasterLayer->colorTable( mBandComboBox->itemData( mBandComboBox->currentIndex() ).toInt() );
QList<QgsColorRampShader::ColorRampItem>::const_iterator itemIt = itemList->constBegin();
int index = 0;
for ( ; itemIt != itemList->constEnd(); ++itemIt )
{
QTreeWidgetItem* item = new QTreeWidgetItem( mTreeWidget );
item->setText( 0, QString::number( index ) );
item->setBackground( 1, QBrush( itemIt->color ) );
++index;
}
}
}