Fix #56 isBusy has been added to ReportEngine

demo_r2/mainwindow.cpp

@@ -107,7 +107,6 @@ void MainWindow::slotPagesSet(int pagesCount)
 
 void MainWindow::slotPageChanged(int page)
 {
-//    ui->sbPageNavigator->setValue(page);
     m_pageNavigator->setValue(page);
 }
 
@@ -118,8 +117,10 @@ void MainWindow::slotPageNavigatorChanged(int page)
 
 void MainWindow::on_treeWidget_itemClicked(QTreeWidgetItem *item, int )
 {
+    if (!m_report.isBusy()){
         m_report.loadFromFile(item->data(0,Qt::UserRole).toString());
         m_preview->refreshPages();
+    }
 }
 
 void MainWindow::initPercentCombobox()

include/lrreportengine.h

@@ -92,6 +92,7 @@ public:
     PreviewReportWidget *createPreviewWidget(QWidget *parent = 0);
     void setPreviewWindowTitle(const QString& title);
     void setPreviewWindowIcon(const QIcon& icon);
+    bool isBusy();
 signals:
     void renderStarted();
     void renderFinished();

limereport/lrreportengine.cpp

@@ -58,7 +58,7 @@ ReportEnginePrivate::ReportEnginePrivate(QObject *parent) :
     QObject(parent), m_fileName(""), m_settings(0), m_ownedSettings(false),
     m_printer(new QPrinter(QPrinter::HighResolution)), m_printerSelected(false),
     m_showProgressDialog(true), m_reportName(""), m_activePreview(0),
-    m_previewWindowIcon(":/report/images/logo32"), m_previewWindowTitle(tr("Preview"))
+    m_previewWindowIcon(":/report/images/logo32"), m_previewWindowTitle(tr("Preview")), m_reportRendering(false)
 {
     m_datasources= new DataSourceManager(this);
     m_datasources->setObjectName("datasources");
@@ -409,6 +409,7 @@ void ReportEnginePrivate::cancelRender()
 {
     if (m_reportRender)
         m_reportRender->cancelRender();
+    m_reportRendering = false;
 }
 
 void ReportEnginePrivate::designReport()
@@ -579,6 +580,11 @@ void ReportEnginePrivate::setSuppressFieldAndVarError(bool suppressFieldAndVarEr
     m_reportSettings.setSuppressAbsentFieldsAndVarsWarnings(suppressFieldAndVarError);
 }
 
+bool ReportEnginePrivate::isBusy()
+{
+    return m_reportRendering;
+}
+
 QString ReportEnginePrivate::previewWindowTitle() const
 {
     return m_previewWindowTitle;
@@ -601,6 +607,7 @@ void ReportEnginePrivate::setPreviewWindowIcon(const QIcon &previewWindowIcon)
 
 ReportPages ReportEnginePrivate::renderToPages()
 {
+    if (m_reportRendering) return ReportPages();
     m_reportRender = ReportRender::Ptr(new ReportRender);
     dataManager()->clearErrors();
     dataManager()->connectAllDatabases();
@@ -608,11 +615,13 @@ ReportPages ReportEnginePrivate::renderToPages()
     connect(m_reportRender.data(),SIGNAL(pageRendered(int)),
             this, SIGNAL(renderPageFinished(int)));
     if (m_pages.count()){
+        m_reportRendering = true;
         emit renderStarted();
         m_reportRender->setDatasources(dataManager());
         m_pages.at(0)->setReportSettings(&m_reportSettings);
         ReportPages result = m_reportRender->renderPageToPages(m_pages.at(0));
         emit renderFinished();
+        m_reportRendering = false;
         return result;
     }else {
         return ReportPages();
@@ -695,6 +704,12 @@ void ReportEngine::setPreviewWindowIcon(const QIcon &icon)
     d->setPreviewWindowIcon(icon);
 }
 
+bool ReportEngine::isBusy()
+{
+    Q_D(ReportEngine);
+    return d->isBusy();
+}
+
 void ReportEngine::setShowProgressDialog(bool value)
 {
     Q_D(ReportEngine);

limereport/lrreportengine.h

@@ -92,6 +92,7 @@ public:
     PreviewReportWidget *createPreviewWidget(QWidget *parent = 0);
     void setPreviewWindowTitle(const QString& title);
     void setPreviewWindowIcon(const QIcon& icon);
+    bool isBusy();
 signals:
     void renderStarted();
     void renderFinished();

limereport/lrreportengine_p.h

@@ -115,7 +115,7 @@ public:
 
     bool suppressFieldAndVarError() const;
     void setSuppressFieldAndVarError(bool suppressFieldAndVarError);
-
+    bool isBusy();
 signals:
     void    pagesLoadFinished();
     void    datasourceCollectionLoadFinished(const QString& collectionName);
@@ -163,6 +163,7 @@ private:
     QString m_previewWindowTitle;
     QPointer<ReportDesignWindow> m_designerWindow;
     ReportSettings m_reportSettings;
+    bool m_reportRendering;
 };
 
 }