From e88ad82968be0d62285a8ff22458c4e947ada30f Mon Sep 17 00:00:00 2001
From: batuhanakcay <43937239+batuhanakcay@users.noreply.github.com>
Date: Wed, 24 Jun 2020 03:50:51 -0400
Subject: [PATCH] Implemented No Results Found warning when search result is
 empty (#2258)

---
 src/widgets/SearchWidget.cpp | 15 +++++++++++++++
 src/widgets/SearchWidget.h   |  1 +
 2 files changed, 16 insertions(+)

diff --git a/src/widgets/SearchWidget.cpp b/src/widgets/SearchWidget.cpp
index 813f11cf..7f22eb60 100644
--- a/src/widgets/SearchWidget.cpp
+++ b/src/widgets/SearchWidget.cpp
@@ -190,11 +190,13 @@ SearchWidget::SearchWidget(MainWindow *main) :
     QShortcut *enter_press = new QShortcut(QKeySequence(Qt::Key_Return), this);
     connect(enter_press, &QShortcut::activated, this, [this]() {
         refreshSearch();
+        checkSearchResultEmpty();
     });
     enter_press->setContext(Qt::WidgetWithChildrenShortcut);
 
     connect(ui->searchButton, &QAbstractButton::clicked, this, [this]() {
         refreshSearch();
+        checkSearchResultEmpty();
     });
 
     connect(ui->searchspaceCombo, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
@@ -265,6 +267,19 @@ void SearchWidget::refreshSearch()
     qhelpers::adjustColumns(ui->searchTreeView, 3, 0);
 }
 
+// No Results Found information message when search returns empty
+// Called by &QShortcut::activated and &QAbstractButton::clicked signals
+void SearchWidget::checkSearchResultEmpty()
+{
+    if (search.isEmpty()){ 
+        QString noResultsMessage="<b>";
+        noResultsMessage.append(tr("No results found for:"));
+        noResultsMessage.append("</b><br>");
+        noResultsMessage.append(ui->filterLineEdit->text().toHtmlEscaped());
+        QMessageBox::information(this, tr("No Results Found"), noResultsMessage);
+    }
+}
+
 void SearchWidget::setScrollMode()
 {
     qhelpers::setVerticalScrollMode(ui->searchTreeView);
diff --git a/src/widgets/SearchWidget.h b/src/widgets/SearchWidget.h
index 3141ef64..d497ef36 100644
--- a/src/widgets/SearchWidget.h
+++ b/src/widgets/SearchWidget.h
@@ -81,6 +81,7 @@ private:
     QList<SearchDescription> search;
 
     void refreshSearch();
+    void checkSearchResultEmpty();
     void setScrollMode();
     void updatePlaceholderText(int index);
 };