clear sodoku button added, renamed vars

window.cpp

@@ -10,14 +10,18 @@ Window::Window(QWidget *parent)
     : QWidget{parent}
 {
     setFixedWidth(1600);
-    m_button = new QPushButton("solve", this);
-    connect(m_button, SIGNAL(clicked()), this, SLOT(solveButtonClicked()));
-    m_button->setGeometry(1200, height() - 30, width() - 1200, 30);
+    m_solveButton = new QPushButton("solve", this);
+    m_solveButton->setGeometry(1100, height() - 100, width() - 1200, 30);
+    connect(m_solveButton, SIGNAL(clicked()), this, SLOT(solveButtonClicked()));
+    m_clearButton = new QPushButton("Clear",this);
+    m_clearButton->setGeometry(1100, height() - 30, width() - 1200, 30);
+    connect(m_clearButton,SIGNAL(clicked()),this,SLOT(clearButtonClicked()));
+
     m_slider = new QSlider(this);
     m_slider->setRange(0, 1000);
     m_slider->setOrientation(Qt::Horizontal);
     m_slider->setValue(m_delay);
-    m_slider->setGeometry(1200, height() - 60, width() - 1200, 30);
+    m_slider->setGeometry(1100, height() - 60, width() - 1200, 30);
     connect(m_slider, SIGNAL(valueChanged(int)), this, SLOT(setValue(int)));
 
     int dx = 0;
@@ -72,11 +76,11 @@ Window::Window(QWidget *parent)
 void Window::solveButtonClicked()
 {
     std::list<History *> hist;
-    bool end = false;
+    bool backtracking = false;
     srand(time(NULL));
     while (1)
     {
-        if (end)
+        if (backtracking)
         {
             hist.back()->cell->un();
             if (hist.back()->index.size() == 0)
@@ -84,7 +88,7 @@ void Window::solveButtonClicked()
                 hist.pop_back();
                 continue;
             }
-            end = false;
+            backtracking = false;
             int choiceNr = rand() % hist.back()->index.size();         // choose a random number;
             hist.back()->cell->collapse(hist.back()->index[choiceNr]); // collapse cell with chosen number;
             std::vector<int>::iterator it;
@@ -121,7 +125,7 @@ void Window::solveButtonClicked()
             else if (minEtropy == 0)
             {
                 qInfo("backtracking");
-                end = true;
+                backtracking = true;
                 continue;
             }
 
@@ -136,6 +140,13 @@ void Window::solveButtonClicked()
     // qInfo("%d---:)");
 }
 
+void Window::clearButtonClicked(){
+    for(auto& x: m_cell){
+        if(x.collapsed)
+            x.un();
+    }
+    return;
+}
 void Window::setValue(int s)
 {
     m_delay = s;

window.h

@@ -13,8 +13,8 @@ public:
     explicit Window(QWidget *parent = nullptr);
 
 private:
-    QPushButton *m_buttonQuit;
-    QPushButton *m_button;
+    QPushButton *m_clearButton;
+    QPushButton *m_solveButton;
     QPushButton *grid[9][9];
     QProgressBar *m_progressBar;
     QSlider *m_slider;
@@ -40,6 +40,7 @@ signals:
 private slots:
     void setValue(int s);
     void solveButtonClicked();
+    void clearButtonClicked();
 };
 
 #endif // WINDOW_H