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112 lines
3.6 KiB
C++
112 lines
3.6 KiB
C++
/***************************************************************************
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* Copyright (C) 2004 by Gary Sherman *
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* sherman at mrcc.com *
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* *
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* GUI for loading a delimited text file as a layer in QGIS *
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* This plugin works in conjuction with the delimited text data *
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* provider plugin *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#include <iostream>
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#include <qfiledialog.h>
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#include <qlineedit.h>
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#include <qfile.h>
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#include <qcombobox.h>
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#include <qpushbutton.h>
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#include "plugingui.h"
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PluginGui::PluginGui() : PluginGuiBase()
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{
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}
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PluginGui::PluginGui( QWidget* parent , const char* name , bool modal , WFlags fl )
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: PluginGuiBase( parent, name, modal, fl )
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{
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}
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PluginGui::~PluginGui()
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{
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}
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void PluginGui::pbnOK_clicked()
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{
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//Build the delimited text URI from the user provided information
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QString uri = QString("%1?delimiter=%2&xField=%3&yField=%4")
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.arg(txtFilePath->text())
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.arg(txtDelimiter->text())
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.arg(cmbXField->currentText())
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.arg(cmbYField->currentText());
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std::cerr << "Adding layer using " << uri << std::endl;
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// add the layer to the map
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emit drawVectorLayer(uri,QString("layername"),"delimitedtext");
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}
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void PluginGui::updateFieldLists()
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{
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// Update the x and y field dropdown boxes
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#ifdef QGISDEBUG
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std::cerr << "Updating field lists" << std::endl;
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#endif
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// open the file
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if(QFile::exists(txtFilePath->text())){
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QFile *file = new QFile(txtFilePath->text());
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if ( file->open( IO_ReadOnly ) ) {
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QTextStream stream( file );
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QString line;
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line = stream.readLine(); // line of text excluding '\n'
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#ifdef QGISDEBUG
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std::cerr << "Attempting to split the input line: " << line <<
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" using delimiter " << txtDelimiter->text() << std::endl;
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#endif
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QStringList fieldList = QStringList::split(txtDelimiter->text(), line);
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#ifdef QGISDEBUG
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std::cerr << "Split line into " << fieldList.size() << " parts" << std::endl;
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#endif
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//
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// We don't know anything about a text based field other
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// than its name. All fields are assumed to be text
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int fieldPos = 0;
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for ( QStringList::Iterator it = fieldList.begin(); it != fieldList.end(); ++it ) {
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// add item to both drop-downs (X field and Y field)
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cmbXField->insertItem(*it);
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cmbYField->insertItem(*it);
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}
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// close the file
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file->close();
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}
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}
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}
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void PluginGui::getOpenFileName()
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{
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// Get a file to process, starting at the current directory
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QString s = QFileDialog::getOpenFileName(
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"./",
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"Text files (*.txt)",
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0,
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"open file dialog",
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"Choose a delimited text file to open" );
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// set path
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txtFilePath->setText(s);
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// update the field drop-down boxes by parsing and splitting
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// the header row
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updateFieldLists();
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}
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void PluginGui::enableBrowseButton(const QString &delimiter)
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{
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// If a delimiter has entered, enable the browse button,
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// otherwise disable it.
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btnBrowseForFile->setEnabled(delimiter.length() > 0);
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}
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