Disable buttons Find Next and Find Previous if the search field is empty.

--HG--
branch : develop

src/app/tape/tmainwindow.cpp

@@ -1984,6 +1984,15 @@ void TMainWindow::InitWindow()
     connect(ui->toolButtonFindPrevious, &QToolButton::clicked, [=] (){search->FindPrevious();});
     connect(ui->toolButtonFindNext, &QToolButton::clicked, [=] (){search->FindNext();});
 
+    connect(search.data(), &VTableSearch::HasResult, [this] (bool state)
+    {
+        ui->toolButtonFindPrevious->setEnabled(state);
+    });
+    connect(search.data(), &VTableSearch::HasResult, [this] (bool state)
+    {
+        ui->toolButtonFindNext->setEnabled(state);
+    });
+
     ui->plainTextEditNotes->setPlainText(m->Notes());
     connect(ui->plainTextEditNotes, &QPlainTextEdit::textChanged, this, &TMainWindow::SaveNotes);
 
@@ -2433,8 +2442,16 @@ void TMainWindow::MFields(bool enabled)
     }
 
     ui->lineEditFind->setEnabled(enabled);
-    ui->toolButtonFindPrevious->setEnabled(enabled);
-    ui->toolButtonFindNext->setEnabled(enabled);
+    if (enabled && not ui->lineEditFind->text().isEmpty())
+    {
+        ui->toolButtonFindPrevious->setEnabled(enabled);
+        ui->toolButtonFindNext->setEnabled(enabled);
+    }
+    else
+    {
+        ui->toolButtonFindPrevious->setEnabled(false);
+        ui->toolButtonFindNext->setEnabled(false);
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------

src/app/valentina/dialogs/dialogincrements.cpp

@@ -113,6 +113,15 @@ DialogIncrements::DialogIncrements(VContainer *data, VPattern *doc, QWidget *par
     connect(ui->toolButtonFindPrevious, &QToolButton::clicked, [=](){search->FindPrevious();});
     connect(ui->toolButtonFindNext, &QToolButton::clicked, [=](){search->FindNext();});
 
+    connect(search.data(), &VTableSearch::HasResult, [this] (bool state)
+    {
+        ui->toolButtonFindPrevious->setEnabled(state);
+    });
+    connect(search.data(), &VTableSearch::HasResult, [this] (bool state)
+    {
+        ui->toolButtonFindNext->setEnabled(state);
+    });
+
     if (ui->tableWidgetIncrement->rowCount() > 0)
     {
         ui->tableWidgetIncrement->selectRow(0);

src/libs/vmisc/vtablesearch.cpp

@@ -37,8 +37,9 @@
 #include "../vmisc/def.h"
 
 //---------------------------------------------------------------------------------------------------------------------
-VTableSearch::VTableSearch(QTableWidget *table)
-    :table(table),
+VTableSearch::VTableSearch(QTableWidget *table, QObject *parent)
+    : QObject(parent),
+      table(table),
       searchIndex(-1),
       searchList()
 {
@@ -69,6 +70,8 @@ void VTableSearch::Clear()
 
     searchList.clear();
     searchIndex = -1;
+
+    emit HasResult(false);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -112,6 +115,8 @@ void VTableSearch::Find(const QString &term)
             QTableWidgetItem *item = searchList.at(searchIndex);
             item->setBackground(Qt::red);
             table->scrollToItem(item);
+
+            emit HasResult(true);
         }
     }
 }
@@ -217,5 +222,11 @@ void VTableSearch::RefreshList(const QString &term)
         QTableWidgetItem *item = searchList.at(searchIndex);
         item->setBackground(Qt::red);
         table->scrollToItem(item);
+
+        emit HasResult(true);
+    }
+    else
+    {
+        emit HasResult(false);
     }
 }

src/libs/vmisc/vtablesearch.h

@@ -29,6 +29,7 @@
 #ifndef VTABLESEARCH_H
 #define VTABLESEARCH_H
 
+#include <QObject>
 #include <QList>
 #include <QString>
 #include <QTableWidget>
@@ -37,10 +38,11 @@
 class QTableWidget;
 class QTableWidgetItem;
 
-class VTableSearch
+class VTableSearch: public QObject
 {
+    Q_OBJECT
 public:
-    explicit VTableSearch(QTableWidget *table);
+    explicit VTableSearch(QTableWidget *table, QObject *parent = nullptr);
 
     void Find(const QString &term);
     void FindPrevious();
@@ -49,6 +51,9 @@ public:
     void AddRow(int row);
     void RefreshList(const QString &term);
 
+signals:
+    void HasResult(bool state);
+
 private:
     Q_DISABLE_COPY(VTableSearch)