move sources to src/; add Moc builder

.gitignore

@@ -1,2 +1,3 @@
-/app
 /.rsconscache
+/app
+/build/

Rsconsfile

@@ -1,5 +1,19 @@
+class Moc < Rscons::Builder
+  def run(target, sources, cache, env, vars)
+    command = %W[moc -o #{target} #{sources.first}]
+    standard_build("Moc #{target}", target, command, sources, env, cache)
+  end
+end
+
 Rscons::Environment.new do |env|
-  sources = Dir["**/*.cc"]
+  env.add_builder(Moc.new)
+  sources = Dir["src/*.cc"]
+  env.build_dir("src", "build")
+  Dir["src/**/*.h"].each do |h_file|
+    moc_fname = env.get_build_fname(h_file, "_moc.cc")
+    env.Moc(moc_fname, h_file)
+    sources << moc_fname
+  end
   env.parse_flags!("!pkg-config --cflags --libs Qt5Core Qt5Gui Qt5Widgets")
   env.parse_flags!("-fPIE")
   env.Program("app", sources)

main.cc

@@ -1,23 +0,0 @@
-#include <QtGui>
-#include <QApplication>
-#include <QtWidgets>
-
-int main(int argc, char * argv[])
-{
-    QApplication app(argc, argv);
-
-    QHBoxLayout * layout = new QHBoxLayout();
-
-    QPushButton * button = new QPushButton("Press me");
-    layout->addWidget(button);
-
-    QLabel * label = new QLabel("Label");
-    layout->addWidget(label);
-
-    QWidget window;
-    window.setLayout(layout);
-    window.setWindowTitle("My Qt Application!");
-    window.show();
-
-    return app.exec();
-}

src/MyWindow.cc

@@ -0,0 +1,24 @@
+#include "MyWindow.h"
+#include <iostream>
+
+using namespace std;
+
+MyWindow::MyWindow(QWidget * parent)
+    : QWidget(parent)
+{
+    QHBoxLayout * layout = new QHBoxLayout();
+
+    QPushButton * button = new QPushButton("Press me");
+    layout->addWidget(button);
+
+    QLabel * label = new QLabel("Label");
+    layout->addWidget(label);
+
+    setLayout(layout);
+    setWindowTitle("My Qt Application!");
+}
+
+void MyWindow::handleButton()
+{
+    cerr << "got a button press" << endl;
+}

src/MyWindow.h

@@ -0,0 +1,19 @@
+#ifndef MYWINDOW_H
+#define MYWINDOW_H
+
+#include <QtGui>
+#include <QApplication>
+#include <QtWidgets>
+
+class MyWindow : public QWidget
+{
+    Q_OBJECT
+
+public:
+    MyWindow(QWidget * parent = 0);
+
+private slots:
+    void handleButton();
+};
+
+#endif

src/main.cc

@@ -0,0 +1,15 @@
+#include <QtGui>
+#include <QApplication>
+#include <QtWidgets>
+
+#include "MyWindow.h"
+
+int main(int argc, char * argv[])
+{
+    QApplication app(argc, argv);
+
+    MyWindow window;
+    window.show();
+
+    return app.exec();
+}