/
qgsquerybuilder.cpp
371 lines (310 loc) · 10.5 KB
/
qgsquerybuilder.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
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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
/***************************************************************************
qgsquerybuilder.cpp - Query Builder
--------------------------------------
Date : 2004-11-19
Copyright : (C) 2004 by Gary E.Sherman
Email : sherman at mrcc.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 "qgsquerybuilder.h"
#include "qgslogger.h"
#include <QListView>
#include <QMessageBox>
#include <QRegExp>
#include <QPushButton>
#include <QSettings>
#include "qgsvectorlayer.h"
#include "qgsvectordataprovider.h"
// constructor used when the query builder must make its own
// connection to the database
QgsQueryBuilder::QgsQueryBuilder( QgsVectorLayer *layer,
QWidget *parent, Qt::WFlags fl )
: QDialog( parent, fl )
, mPreviousFieldRow( -1 )
, mLayer( layer )
{
setupUi( this );
QSettings settings;
restoreGeometry( settings.value( "/Windows/QueryBuilder/geometry" ).toByteArray() );
QPushButton *pbn = new QPushButton( tr( "&Test" ) );
buttonBox->addButton( pbn, QDialogButtonBox::ActionRole );
connect( pbn, SIGNAL( clicked() ), this, SLOT( test() ) );
pbn = new QPushButton( tr( "&Clear" ) );
buttonBox->addButton( pbn, QDialogButtonBox::ActionRole );
connect( pbn, SIGNAL( clicked() ), this, SLOT( clear() ) );
setupGuiViews();
mOrigSubsetString = layer->subsetString();
mUseUnfilteredLayer->setDisabled( mLayer->subsetString().isEmpty() );
lblDataUri->setText( layer->name() );
txtSQL->setText( mOrigSubsetString );
populateFields();
}
QgsQueryBuilder::~QgsQueryBuilder()
{
QSettings settings;
settings.setValue( "/Windows/QueryBuilder/geometry", saveGeometry() );
}
void QgsQueryBuilder::populateFields()
{
const QgsFields& fields = mLayer->pendingFields();
for ( int idx = 0; idx < fields.count(); ++idx )
{
QStandardItem *myItem = new QStandardItem( fields[idx].name() );
myItem->setData( idx );
myItem->setEditable( false );
mModelFields->insertRow( mModelFields->rowCount(), myItem );
}
// All fields get ... setup
setupLstFieldsModel();
}
void QgsQueryBuilder::setupLstFieldsModel()
{
lstFields->setModel( mModelFields );
}
void QgsQueryBuilder::setupGuiViews()
{
//Initialize the models
mModelFields = new QStandardItemModel();
mModelValues = new QStandardItemModel();
// Modes
lstFields->setViewMode( QListView::ListMode );
lstValues->setViewMode( QListView::ListMode );
lstFields->setSelectionBehavior( QAbstractItemView::SelectRows );
lstValues->setSelectionBehavior( QAbstractItemView::SelectRows );
// Performance tip since Qt 4.1
lstFields->setUniformItemSizes( true );
lstValues->setUniformItemSizes( true );
// Colored rows
lstFields->setAlternatingRowColors( true );
lstValues->setAlternatingRowColors( true );
}
void QgsQueryBuilder::fillValues( int idx, int limit )
{
// clear the model
mModelValues->clear();
// determine the field type
QList<QVariant> values;
mLayer->uniqueValues( idx, values, limit );
QSettings settings;
QString nullValue = settings.value( "qgis/nullValue", "NULL" ).toString();
QgsDebugMsg( QString( "nullValue: %1" ).arg( nullValue ) );
for ( int i = 0; i < values.size(); i++ )
{
QString value;
if ( values[i].isNull() )
value = nullValue;
else if ( values[i].type() == QVariant::Date && mLayer->providerType() == "ogr" && mLayer->storageType() == "ESRI Shapefile" )
value = values[i].toDate().toString( "yyyy/MM/dd" );
else
value = values[i].toString();
QStandardItem *myItem = new QStandardItem( value );
myItem->setEditable( false );
myItem->setData( values[i], Qt::UserRole + 1 );
mModelValues->insertRow( mModelValues->rowCount(), myItem );
QgsDebugMsg( QString( "Value is null: %1\nvalue: %2" ).arg( values[i].isNull() ).arg( values[i].isNull() ? nullValue : values[i].toString() ) );
}
}
void QgsQueryBuilder::on_btnSampleValues_clicked()
{
lstValues->setCursor( Qt::WaitCursor );
QString prevSubsetString = mLayer->subsetString();
if ( mUseUnfilteredLayer->isChecked() && !prevSubsetString.isEmpty() )
{
mLayer->setSubsetString( "" );
}
//delete connection mModelValues and lstValues
QStandardItemModel *tmp = new QStandardItemModel();
lstValues->setModel( tmp );
//Clear and fill the mModelValues
fillValues( mModelFields->data( lstFields->currentIndex(), Qt::UserRole + 1 ).toInt(), 25 );
lstValues->setModel( mModelValues );
//delete the tmp
delete tmp;
if ( prevSubsetString != mLayer->subsetString() )
{
mLayer->setSubsetString( prevSubsetString );
}
lstValues->setCursor( Qt::ArrowCursor );
}
void QgsQueryBuilder::on_btnGetAllValues_clicked()
{
lstValues->setCursor( Qt::WaitCursor );
QString prevSubsetString = mLayer->subsetString();
if ( mUseUnfilteredLayer->isChecked() && !prevSubsetString.isEmpty() )
{
mLayer->setSubsetString( "" );
}
//delete connection mModelValues and lstValues
QStandardItemModel *tmp = new QStandardItemModel();
lstValues->setModel( tmp );
//Clear and fill the mModelValues
fillValues( mModelFields->data( lstFields->currentIndex(), Qt::UserRole + 1 ).toInt(), -1 );
lstValues->setModel( mModelValues );
//delete the tmp
delete tmp;
if ( prevSubsetString != mLayer->subsetString() )
{
mLayer->setSubsetString( prevSubsetString );
}
lstValues->setCursor( Qt::ArrowCursor );
}
void QgsQueryBuilder::test()
{
// test the sql statement to see if it works
// by counting the number of records that would be
// returned
if ( mLayer->setSubsetString( txtSQL->toPlainText() ) )
{
mUseUnfilteredLayer->setDisabled( mLayer->subsetString().isEmpty() );
QMessageBox::information( this,
tr( "Query Result" ),
tr( "The where clause returned %n row(s).", "returned test rows", mLayer->featureCount() ) );
}
else if ( mLayer->dataProvider()->hasErrors() )
{
QMessageBox::warning( this,
tr( "Query Failed" ),
tr( "An error occurred when executing the query." )
+ tr( "\nThe data provider said:\n%1" ).arg( mLayer->dataProvider()->errors().join( "\n" ) ) );
mLayer->dataProvider()->clearErrors();
}
else
{
QMessageBox::warning( this,
tr( "Query Failed" ),
tr( "An error occurred when executing the query." ) );
}
}
void QgsQueryBuilder::accept()
{
if ( !mLayer->setSubsetString( txtSQL->toPlainText() ) )
{
//error in query - show the problem
if ( mLayer->dataProvider()->hasErrors() )
{
QMessageBox::warning( this,
tr( "Query Failed" ),
tr( "An error occurred when executing the query." )
+ tr( "\nThe data provider said:\n%1" ).arg( mLayer->dataProvider()->errors().join( "\n" ) ) );
mLayer->dataProvider()->clearErrors();
}
else
{
QMessageBox::warning( this, tr( "Error in Query" ), tr( "The subset string could not be set" ) );
}
return;
}
QDialog::accept();
}
void QgsQueryBuilder::reject()
{
if ( mLayer->subsetString() != mOrigSubsetString )
mLayer->setSubsetString( mOrigSubsetString );
QDialog::reject();
}
void QgsQueryBuilder::on_btnEqual_clicked()
{
txtSQL->insertPlainText( " = " );
}
void QgsQueryBuilder::on_btnLessThan_clicked()
{
txtSQL->insertPlainText( " < " );
}
void QgsQueryBuilder::on_btnGreaterThan_clicked()
{
txtSQL->insertPlainText( " > " );
}
void QgsQueryBuilder::on_btnPct_clicked()
{
txtSQL->insertPlainText( "%" );
}
void QgsQueryBuilder::on_btnIn_clicked()
{
txtSQL->insertPlainText( " IN " );
}
void QgsQueryBuilder::on_btnNotIn_clicked()
{
txtSQL->insertPlainText( " NOT IN " );
}
void QgsQueryBuilder::on_btnLike_clicked()
{
txtSQL->insertPlainText( " LIKE " );
}
QString QgsQueryBuilder::sql()
{
return txtSQL->toPlainText();
}
void QgsQueryBuilder::setSql( QString sqlStatement )
{
txtSQL->setText( sqlStatement );
}
void QgsQueryBuilder::on_lstFields_clicked( const QModelIndex &index )
{
if ( mPreviousFieldRow != index.row() )
{
mPreviousFieldRow = index.row();
btnSampleValues->setEnabled( true );
btnGetAllValues->setEnabled( true );
mModelValues->clear();
}
}
void QgsQueryBuilder::on_lstFields_doubleClicked( const QModelIndex &index )
{
txtSQL->insertPlainText( "\"" + mLayer->pendingFields()[ mModelFields->data( index, Qt::UserRole+1 ).toInt()].name() + "\"" );
}
void QgsQueryBuilder::on_lstValues_doubleClicked( const QModelIndex &index )
{
QVariant value = mModelValues->data( index, Qt::UserRole + 1 );
if ( value.isNull() )
txtSQL->insertPlainText( "NULL" );
else if ( value.type() == QVariant::Date && mLayer->providerType() == "ogr" && mLayer->storageType() == "ESRI Shapefile" )
txtSQL->insertPlainText( "'" + value.toDate().toString( "yyyy/MM/dd" ) + "'" );
else if ( value.type() == QVariant::Int || value.type() == QVariant::Double || value.type() == QVariant::LongLong )
txtSQL->insertPlainText( value.toString() );
else
txtSQL->insertPlainText( "'" + value.toString().replace( "'", "''" ) + "'" );
}
void QgsQueryBuilder::on_btnLessEqual_clicked()
{
txtSQL->insertPlainText( " <= " );
}
void QgsQueryBuilder::on_btnGreaterEqual_clicked()
{
txtSQL->insertPlainText( " >= " );
}
void QgsQueryBuilder::on_btnNotEqual_clicked()
{
txtSQL->insertPlainText( " != " );
}
void QgsQueryBuilder::on_btnAnd_clicked()
{
txtSQL->insertPlainText( " AND " );
}
void QgsQueryBuilder::on_btnNot_clicked()
{
txtSQL->insertPlainText( " NOT " );
}
void QgsQueryBuilder::on_btnOr_clicked()
{
txtSQL->insertPlainText( " OR " );
}
void QgsQueryBuilder::clear()
{
txtSQL->clear();
mLayer->setSubsetString( "" );
mUseUnfilteredLayer->setDisabled( true );
}
void QgsQueryBuilder::on_btnILike_clicked()
{
txtSQL->insertPlainText( " ILIKE " );
}
void QgsQueryBuilder::setDatasourceDescription( QString uri )
{
lblDataUri->setText( uri );
}