From c6dd35f03dd58a5712d38a3ce535723cdf0ffb30 Mon Sep 17 00:00:00 2001
From: "Wladimir J. van der Laan" <laanwj@gmail.com>
Date: Wed, 1 Jun 2011 09:33:48 +0200
Subject: [PATCH] Apply button

---
 gui/include/optionsdialog.h |  7 +++++++
 gui/src/optionsdialog.cpp   | 33 ++++++++++++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 1 deletion(-)

diff --git a/gui/include/optionsdialog.h b/gui/include/optionsdialog.h
index c064b0a9..ff8542d4 100644
--- a/gui/include/optionsdialog.h
+++ b/gui/include/optionsdialog.h
@@ -8,6 +8,7 @@ class QStackedWidget;
 class QListWidget;
 class QListWidgetItem;
 class QDataWidgetMapper;
+class QPushButton;
 QT_END_NAMESPACE
 class OptionsModel;
 class MainOptionsPage;
@@ -24,12 +25,18 @@ signals:
 
 public slots:
     void changePage(QListWidgetItem *current, QListWidgetItem *previous);
+private slots:
+    void okClicked();
+    void cancelClicked();
+    void applyClicked();
+    void enableApply();
 private:
     QListWidget *contents_widget;
     QStackedWidget *pages_widget;
     MainOptionsPage *main_options_page;
     OptionsModel *model;
     QDataWidgetMapper *mapper;
+    QPushButton *apply_button;
 
     void setupMainPage();
 };
diff --git a/gui/src/optionsdialog.cpp b/gui/src/optionsdialog.cpp
index e1f3d67d..4d0493a2 100644
--- a/gui/src/optionsdialog.cpp
+++ b/gui/src/optionsdialog.cpp
@@ -8,6 +8,7 @@
 #include <QListWidget>
 #include <QStackedWidget>
 #include <QDataWidgetMapper>
+#include <QDebug>
 
 OptionsDialog::OptionsDialog(QWidget *parent):
     QDialog(parent), contents_widget(0), pages_widget(0),
@@ -39,7 +40,8 @@ OptionsDialog::OptionsDialog(QWidget *parent):
     buttons->addWidget(ok_button);
     QPushButton *cancel_button = new QPushButton(tr("Cancel"));
     buttons->addWidget(cancel_button);
-    QPushButton *apply_button = new QPushButton(tr("Apply"));
+    apply_button = new QPushButton(tr("Apply"));
+    apply_button->setEnabled(false);
     buttons->addWidget(apply_button);
 
     layout->addLayout(buttons);
@@ -47,9 +49,16 @@ OptionsDialog::OptionsDialog(QWidget *parent):
     setLayout(layout);
     setWindowTitle(tr("Options"));
 
+    /* Widget-to-option mapper */
     mapper = new QDataWidgetMapper();
     mapper->setSubmitPolicy(QDataWidgetMapper::ManualSubmit);
     mapper->setOrientation(Qt::Vertical);
+    connect(mapper->itemDelegate(), SIGNAL(commitData(QWidget*)), this, SLOT(enableApply()));
+
+    /* Event bindings */
+    connect(ok_button, SIGNAL(clicked()), this, SLOT(okClicked()));
+    connect(cancel_button, SIGNAL(clicked()), this, SLOT(cancelClicked()));
+    connect(apply_button, SIGNAL(clicked()), this, SLOT(applyClicked()));
 }
 
 void OptionsDialog::setModel(OptionsModel *model)
@@ -70,3 +79,25 @@ void OptionsDialog::changePage(QListWidgetItem *current, QListWidgetItem *previo
         pages_widget->setCurrentIndex(contents_widget->row(current));
     }
 }
+
+void OptionsDialog::okClicked()
+{
+    mapper->submit();
+    accept();
+}
+
+void OptionsDialog::cancelClicked()
+{
+    reject();
+}
+
+void OptionsDialog::applyClicked()
+{
+    mapper->submit();
+    apply_button->setEnabled(false);
+}
+
+void OptionsDialog::enableApply()
+{
+    apply_button->setEnabled(true);
+}