Settings update from zoom now happens on rendering.

Updating of the render settings will now not happen until the render
button is pressed. This will allow the user to redefine the area an
infinite number of times until the render button is pushed.

client/main_window.cpp

@@ -124,6 +124,9 @@ void main_window::send_img_render()
     if (!socket)
         return;
 
+    // Update the render settings.
+    render_settings = new_render_settings;
+
     QByteArray settings;
     QDataStream stream(&settings, QIODevice::ReadWrite);
 
@@ -176,15 +179,16 @@ void main_window::handle_mouse_press(QMouseEvent* event)
                                                                       rect->y() + 
                                                                       rect->rect().height());
 
-        render_settings.re_max = real(lower_right);
-        render_settings.re_min = real(upper_left);
-        render_settings.im_max = imag(lower_right);
-        render_settings.im_min = imag(upper_left);
+        new_render_settings = render_settings;
+        new_render_settings.re_max = real(lower_right);
+        new_render_settings.re_min = real(upper_left);
+        new_render_settings.im_max = imag(lower_right);
+        new_render_settings.im_min = imag(upper_left);
 
-        field_list[0]->setText(QString("%1").arg(render_settings.re_max));
-        field_list[1]->setText(QString("%1").arg(render_settings.re_min));
-        field_list[2]->setText(QString("%1").arg(render_settings.im_max));
-        field_list[3]->setText(QString("%1").arg(render_settings.im_min));
+        field_list[0]->setText(QString("%1").arg(new_render_settings.re_max));
+        field_list[1]->setText(QString("%1").arg(new_render_settings.re_min));
+        field_list[2]->setText(QString("%1").arg(new_render_settings.im_max));
+        field_list[3]->setText(QString("%1").arg(new_render_settings.im_min));
     }
 }
 

client/main_window.h

@@ -37,6 +37,7 @@ class main_window : public QWidget
         // Contains user set settings.
         std::vector<QLineEdit*> field_list;
         mandel_settings render_settings;
+        mandel_settings new_render_settings;
 
         bool drawing_rect;
         QGraphicsRectItem* rect;