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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/***************************************************************************
qgsmaprenderersequentialjob.cpp
--------------------------------------
Date : December 2013
Copyright : (C) 2013 by Martin Dobias
Email : wonder dot sk at gmail dot com
***************************************************************************
* *
* 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 "qgsmaprenderersequentialjob.h"
#include "qgslogger.h"
#include "qgsmaprenderercustompainterjob.h"
#include "qgspallabeling.h"
QgsMapRendererSequentialJob::QgsMapRendererSequentialJob( const QgsMapSettings& settings )
: QgsMapRendererQImageJob( settings )
, mInternalJob( 0 )
, mPainter( 0 )
, mLabelingResults( 0 )
{
QgsDebugMsg( "SEQUENTIAL construct" );
mImage = QImage( mSettings.outputSize(), mSettings.outputImageFormat() );
}
QgsMapRendererSequentialJob::~QgsMapRendererSequentialJob()
{
QgsDebugMsg( "SEQUENTIAL destruct" );
if ( isActive() )
{
// still running!
QgsDebugMsg( "SEQUENTIAL destruct -- still running! (cancelling)" );
cancel();
}
Q_ASSERT( mInternalJob == 0 && mPainter == 0 );
delete mLabelingResults;
mLabelingResults = 0;
}
void QgsMapRendererSequentialJob::start()
{
if ( isActive() )
return; // do nothing if we are already running
mRenderingStart.start();
mErrors.clear();
QgsDebugMsg( "SEQUENTIAL START" );
Q_ASSERT( mInternalJob == 0 && mPainter == 0 );
mPainter = new QPainter( &mImage );
mInternalJob = new QgsMapRendererCustomPainterJob( mSettings, mPainter );
mInternalJob->setCache( mCache );
connect( mInternalJob, SIGNAL( finished() ), SLOT( internalFinished() ) );
mInternalJob->start();
}
void QgsMapRendererSequentialJob::cancel()
{
if ( !isActive() )
return;
QgsDebugMsg( "sequential - cancel internal" );
mInternalJob->cancel();
Q_ASSERT( mInternalJob == 0 && mPainter == 0 );
}
void QgsMapRendererSequentialJob::waitForFinished()
{
if ( !isActive() )
return;
mInternalJob->waitForFinished();
}
bool QgsMapRendererSequentialJob::isActive() const
{
return mInternalJob != 0;
}
QgsLabelingResults* QgsMapRendererSequentialJob::takeLabelingResults()
{
QgsLabelingResults* tmp = mLabelingResults;
mLabelingResults = 0;
return tmp;
}
QImage QgsMapRendererSequentialJob::renderedImage()
{
if ( isActive() && mCache )
// this will allow immediate display of cached layers and at the same time updates of the layer being rendered
return composeImage( mSettings, mInternalJob->jobs() );
else
return mImage;
}
void QgsMapRendererSequentialJob::internalFinished()
{
QgsDebugMsg( "SEQUENTIAL finished" );
mPainter->end();
delete mPainter;
mPainter = 0;
mLabelingResults = mInternalJob->takeLabelingResults();
mErrors = mInternalJob->errors();
// now we are in a slot called from mInternalJob - do not delete it immediately
// so the class is still valid when the execution returns to the class
mInternalJob->deleteLater();
mInternalJob = 0;
mRenderingTime = mRenderingStart.elapsed();
emit finished();
}
|
