mirror of
https://github.com/qgis/QGIS.git
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100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
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#include <cassert>
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#include <iostream>
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#include <qstring.h>
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#include <qapplication.h>
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#include <qmessagebox.h>
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#include <qfileinfo.h>
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#include <qtextbrowser.h>
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#include <sqlite3.h>
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#include "qgshelpviewer.h"
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QgsHelpViewer::QgsHelpViewer(const QString &contextId, QWidget *parent,
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const char *name)
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{
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loadContext(contextId);
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}
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QgsHelpViewer::~QgsHelpViewer()
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{
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}
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void QgsHelpViewer::setContext(const QString &contextId)
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{
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#ifndef WIN32
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setWindowState(windowState() & ~WindowMinimized);
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#endif
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raise();
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setActiveWindow();
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loadContext(contextId);
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}
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void QgsHelpViewer::fileExit()
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{
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QApplication::exit();
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}
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void QgsHelpViewer::loadContext(const QString &contextId)
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{
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if(contextId != QString::null)
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{
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// connect to the database
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QString helpDbPath =
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#ifdef Q_OS_MACX
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// remove bin/qgis_help.app/Contents/MacOS to get to share/qgis
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qApp->applicationDirPath() + "/../../../../share/qgis" +
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#elif WIN32
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qApp->applicationDirPath() + "/share/qgis"
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#else
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QString(PKGDATAPATH) +
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#endif
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"/resources/qgis_help.db";
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int rc = connectDb(helpDbPath);
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// get the help content and title from the database
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if(rc == SQLITE_OK)
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{
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sqlite3_stmt *ppStmt;
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const char *pzTail;
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// build the sql statement
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QString sql = "select content,title from tbl_help where context_id = "
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+ contextId;
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rc = sqlite3_prepare(db, (const char *)sql, sql.length(), &ppStmt, &pzTail);
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if(rc == SQLITE_OK)
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{
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if(sqlite3_step(ppStmt) == SQLITE_ROW){
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// there should only be one row returned
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// Set the browser text to the record from the database
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txtBrowser->setText((char*)sqlite3_column_text(ppStmt, 0));
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setCaption(tr("Quantum GIS Help - ") +(char*)sqlite3_column_text(ppStmt, 1));
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}
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}
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else
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{
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QMessageBox::critical(this, "Error",
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tr("Failed to get the help text from the database") + QString(":\n ")
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+ sqlite3_errmsg(db));
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}
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// close the statement
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sqlite3_finalize(ppStmt);
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// close the database
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sqlite3_close(db);
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}
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}
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}
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int QgsHelpViewer::connectDb(const QString &helpDbPath)
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{
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// Check to see if the database exists on the path since opening
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// a sqlite3 database always succeeds
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int result;
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if(QFileInfo(helpDbPath).exists()){
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char *zErrMsg = 0;
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int rc;
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rc = sqlite3_open(helpDbPath, &db);
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result = rc;
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}
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else
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{
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QMessageBox::critical(this, tr("Error"),
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tr("The QGIS help database is not installed"));
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result = SQLITE_ERROR;
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}
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return result;
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}
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