Tile: check if the puzzle is solved

Tile/src/main.cpp

@@ -6,6 +6,8 @@
 #include <QtGui/QWSServer>
 #endif
 
+bool isRunning = 0;
+
 int main(int argc, char *argv[])
 {
     QApplication a(argc, argv);

Tile/src/tile.cpp

@@ -159,6 +159,20 @@ void Tile::swapButtons(QPushButton *button, QPushButton *button_neighbour) {
     button->setText("16");
     button_neighbour->show();
     button_neighbour->setFocus();
+    //qDebug() << isSolved();
+    if (isRunning && isSolved()) {
+        switch (QMessageBox::information(this,
+                                 "Solved!",
+                                 "Hooray, you solved it!\nShuffle again?",
+                                 "&Yes","&No"))
+        {
+        case 0:
+            Shuffle();
+        default:
+            isRunning = 0;
+            break;
+        }
+    }
 }
 
 void Tile::Reset()
@@ -203,6 +217,8 @@ void Tile::Shuffle()
     }
     if (!isSolvable()) {
         Shuffle();
+    } else {
+        isRunning = 1;
     }
 }
 
@@ -323,7 +339,8 @@ bool Tile::eventFilter(QObject *obj, QEvent *event)
     return result;
 }//eventFilter
 
-void Tile::keyUp(QPushButton *button) {
+void Tile::keyUp(QPushButton *button)
+{
     int id = button->property("id").toInt();
     QPushButton *button_up;
     if (id < 5) {
@@ -338,7 +355,8 @@ void Tile::keyUp(QPushButton *button) {
     }
 }
 
-void Tile::keyDown(QPushButton *button) {
+void Tile::keyDown(QPushButton *button)
+{
     int id = button->property("id").toInt();
     QPushButton *button_down;
     if (id > 12) {
@@ -352,3 +370,15 @@ void Tile::keyDown(QPushButton *button) {
         button_down->setFocus();
     }
 }
+
+bool Tile::isSolved()
+{
+    QPushButton *button;
+    for (int i = 1; i < 17; i++) {
+        button = idtoButton(i);
+        if (button->text() != button->property("id")) {
+            return 0;
+        }
+    }
+    return 1;
+}

Tile/src/tile.h

@@ -8,6 +8,8 @@
 #include <QMessageBox>
 #include <QKeyEvent>
 
+extern bool isRunning;
+
 namespace Ui {
     class Tile;
 }
@@ -32,6 +34,7 @@ public slots:
     bool eventFilter(QObject *obj, QEvent *event);
     void keyUp(QPushButton *button);
     void keyDown(QPushButton *button);
+    bool isSolved();
 
 protected:
     void changeEvent(QEvent *e);