fix issue #36: Find should indicate visually, if symbol wasn't found.

Signed-off-by: zdenop <zdenop@gmail.com>

dialogs/FindDialog.cpp

@@ -4,7 +4,7 @@
 * Author:      Zdenko Podobny
 * Created:     2011-09-23
 *
-* (C) Copyright 2011, Zdenko Podobny
+* (C) Copyright 2011-2014, Zdenko Podobny
 **
 ** Licensed under the Apache License, Version 2.0 (the "License");
 ** you may not use this file except in compliance with the License.
@@ -22,6 +22,8 @@
 
 #include "dialogs/FindDialog.h"
 #include "Settings.h"
+#include <unistd.h>
+#include <QDebug>
 
 FindDialog::FindDialog(QWidget* parent, QString title)
   : QDialog(parent) {
@@ -50,7 +52,9 @@ FindDialog::FindDialog(QWidget* parent, QString title)
   connect(findPrevButton, SIGNAL(clicked()), this, SLOT(findPrev()));
   connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
   connect(checkBox_Mc, SIGNAL(toggled(bool)), this, SLOT(changed_Mc(bool)));
-
+  connect(parent, SIGNAL(blinkFindDialog()), this, SLOT(blinkFindDialog()));
+  timerBlink = new QTimeLine(10);
+  originalBackColor = this->palette().color(QPalette::Background);;
   getSettings();
 }
 
@@ -81,6 +85,25 @@ void FindDialog::changed_Mc(bool status) {
   settings.setValue("Find/MatchCase", status);
 }
 
+void FindDialog::blinkFindDialog() {
+  QApplication::beep();
+  if(timerBlink->state() == QTimeLine::NotRunning)
+    {
+    timerBlink->resume();
+    connect(timerBlink, SIGNAL(finished()), this, SLOT(blinkFinished()));
+    }
+  QPalette pal = this->palette();
+  pal.setColor(QPalette::Background, Qt::red);
+  this->setPalette(pal);
+}
+
+void FindDialog::blinkFinished() {
+  disconnect(timerBlink, SIGNAL(finished()), this, SLOT(blinkFinished()));
+  QPalette pal = this->palette();
+  pal.setColor(QPalette::Background, originalBackColor);
+  this->setPalette(pal);
+}
+
 void FindDialog::closeEvent(QCloseEvent* event) {
     writeGeometry();
     event->accept();

dialogs/FindDialog.h

@@ -4,7 +4,7 @@
 * Author:      Zdenko Podobny
 * Created:     2011-09-23
 *
-* (C) Copyright 2011, Zdenko Podobny
+* (C) Copyright 2011-2014, Zdenko Podobny
 **
 ** Licensed under the Apache License, Version 2.0 (the "License");
 ** you may not use this file except in compliance with the License.
@@ -27,6 +27,7 @@
 #include <QCloseEvent>
 #include <QPushButton>
 #include <QDialog>
+#include <QTimeLine>
 
 #include "ui_FindDialog.h"
 
@@ -36,6 +37,9 @@ class FindDialog : public QDialog, public Ui::Find {
   public:
     explicit FindDialog(QWidget* parent = 0, QString title = "");
 
+  public slots:
+    void blinkFindDialog();
+
   signals:
     void findNext(const QString &smbl, Qt::CaseSensitivity mc);
     void findPrev(const QString &smbl, Qt::CaseSensitivity mc);
@@ -47,13 +51,16 @@ class FindDialog : public QDialog, public Ui::Find {
     QPushButton *findNextButton;
     QPushButton *findPrevButton;
     QPushButton *closeButton;
+    QTimeLine *timerBlink;
+    QColor originalBackColor;
 
     void writeGeometry();
 
   private slots:
     void on_lineEdit_textChanged();
     void findNext();
     void findPrev();
+    void blinkFinished();
     void changed_Mc(bool status);
     void getSettings();
 };

src/ChildWidget.cpp

@@ -2673,7 +2673,8 @@ void ChildWidget::findNext(const QString &symbol, Qt::CaseSensitivity mc) {
     }
     ++row;
   }
-  QApplication::beep();
+  emit blinkFindDialog();
+  emit statusBarMessage(tr("End of search!"));
 }
 
 void ChildWidget::findPrev(const QString &symbol,
@@ -2690,7 +2691,8 @@ void ChildWidget::findPrev(const QString &symbol,
     }
     --row;
   }
-  QApplication::beep();
+  emit blinkFindDialog();
+  emit statusBarMessage(tr("End of found!"));
 }
 
 bool ChildWidget::isUndoAvailable() {

src/ChildWidget.h

@@ -303,6 +303,7 @@ class ChildWidget : public QSplitter {
   signals:
     void boxChanged();
     void modifiedChanged();
+    void blinkFindDialog();
     void zoomRatioChanged(qreal);
     void statusBarMessage(QString);