add simple search facility

mainwindow.cpp

@@ -18,11 +18,18 @@ MainWindow::MainWindow(QWidget *parent) :
     connect( search, SIGNAL(search_status(QString)),
              ui->statusBar, SLOT(showMessage(QString)));
 
+    connect( search, SIGNAL(search_results(QStringList)),
+             this, SLOT(elideNotes(QStringList)));
+
     connect( ui->pb_opt, &QPushButton::clicked,
         [=]()
         {
             ui->mainline->clear();
             search->search_clear();
+            iterList( [](QListWidgetItem* it)
+            {
+                it->setHidden(false);
+            });
         });
 
     ui->mainToolBar->hide();
@@ -33,6 +40,8 @@ MainWindow::MainWindow(QWidget *parent) :
         {
             loadNote(item->text());
         });
+
+
 }
 
 MainWindow::~MainWindow()
@@ -47,6 +56,27 @@ QString MainWindow::getNotesPath()
     return QString("../corpus");
 }
 
+void MainWindow::elideNotes(const QStringList & notefiles)
+{
+    ui->doclist->setUpdatesEnabled(false);
+    for( int irow=0; irow<ui->doclist->count(); ++irow)
+    {
+        auto it = ui->doclist->item(irow);
+        it->setHidden(!notefiles.contains( it->text() ));
+    }
+    ui->doclist->setUpdatesEnabled(true);
+}
+
+
+void MainWindow::iterList(nitFunc nitfunc)
+{
+    ui->doclist->setUpdatesEnabled(false);
+    for( int irow=0; irow<ui->doclist->count(); ++irow)
+    {
+       nitfunc(ui->doclist->item(irow));
+    }
+    ui->doclist->setUpdatesEnabled(true);
+}
 
 void MainWindow::iterNotes(noteFunc proc)
 {

mainwindow.h

@@ -5,6 +5,7 @@
 #include <QString>
 #include <QStringList>
 #include <QMainWindow>
+#include <QListWidget>
 
 #include "searcher.h"
 
@@ -23,7 +24,7 @@ class MainWindow : public QMainWindow
     ~MainWindow();
 
 public slots:
-
+    void elideNotes(const QStringList&);
 
 private:
     Ui::MainWindow *ui;
@@ -34,8 +35,10 @@ public slots:
 
     // title, path
     typedef std::function<void (const QString&)> noteFunc;
+    typedef std::function<void (QListWidgetItem*)> nitFunc;
 
     void iterNotes(noteFunc);
+    void iterList(nitFunc);
     void loadNote( const QString& fname);
     void populateList();
 };

searcher.cpp

@@ -4,6 +4,7 @@
 #include "searcher.h"
 
 static QSqlDatabase* s_db = 0;
+static QSqlQuery* s_qy = 0;
 
 Searcher::Searcher(QObject *parent) :
     QObject(parent)
@@ -46,5 +47,21 @@ void Searcher::search_clear()
 
 void Searcher::search_update(QString str)
 {
+    if( s_qy == 0 )
+    {
+        s_qy = new QSqlQuery(*s_db);
+        s_qy->prepare("SELECT fname FROM docs WHERE docs MATCH :sterm;");
+    }
     emit search_status("Searching: " + str);
+
+    QString sstr = "*" + str + "*";
+    s_qy->bindValue( ":sterm", QVariant(sstr));
+    s_qy->exec();
+
+    QStringList results;
+    while(s_qy->next())
+    {
+        results << s_qy->value(0).toString();
+    }
+    emit search_results(results);
 }

searcher.h

@@ -2,6 +2,7 @@
 #define SEARCHER_H
 
 #include <QObject>
+#include <QStringList>
 
 class Searcher : public QObject
 {
@@ -12,6 +13,7 @@ class Searcher : public QObject
 
 signals:
     void search_status(QString);
+    void search_results(const QStringList&);
 
 public slots:
     void load_entry(const QString& title, const QString& body);