学习Gtkmm系列之五

程序客户区的创建可谓仁者见仁，智者见智了。比较常用的就是使用hpaned控件来完成，左边为sidepane，右边位mainpane，这样将来可以根据实际应用的需要来采用不同的控件。我这里使用两个Button来演示。该控件采用属性来与菜单中的选项的使能状态一一对应。由于不太熟悉gtkmm，其资料也比较少，用了点时间来研究属性的用法（gtkmm源码都是对gtk的封装，不太适合）。

头文件代码如下：（特别注意构造函数的用法）

class ClientRoot : public Gtk::HPaned                                              {  public:  ClientRoot();  virtual ~ClientRoot();  Glib::PropertyProxy<bool> property_can_save();  Glib::PropertyProxy<bool> property_can_save_as();  Glib::PropertyProxy<bool> property_can_undo();  Glib::PropertyProxy<bool> property_can_redo();  Glib::PropertyProxy<bool> property_can_cut();  Glib::PropertyProxy<bool> property_can_copy();  Glib::PropertyProxy<bool> property_can_paste();  Glib::PropertyProxy<bool> property_can_delete();  Glib::PropertyProxy<bool> property_can_select_all(); protected:  void onTestProperties(); private:  Glib::Property<bool> prop_can_save;  Glib::Property<bool> prop_can_save_as;  Glib::Property<bool> prop_can_undo;  Glib::Property<bool> prop_can_redo;  Glib::Property<bool> prop_can_cut;  Glib::Property<bool> prop_can_copy;  Glib::Property<bool> prop_can_paste;  Glib::Property<bool> prop_can_delete;  Glib::Property<bool> prop_can_select_all;  Gtk::Button m_SidePane;  Gtk::Button m_MainPane;};

实现文件关键代码如下：

ClientRoot::ClientRoot()   : Glib::ObjectBase (typeid (ClientRoot)),    prop_can_save(*this, "can-save"),    prop_can_save_as(*this, "can-save-as"),    prop_can_undo(*this, "can-undo"),    prop_can_redo(*this, "can-redo"),    prop_can_cut(*this, "can-cut"),    prop_can_copy(*this, "can-copy"),    prop_can_paste(*this, "can-paste"),    prop_can_delete(*this, "can-delete"),    prop_can_select_all(*this, "can-select-all"),    m_SidePane("SidePane"),    m_MainPane("MainPane"){   pack1(m_SidePane, true, false);  pack2(m_MainPane, true, false);  m_MainPane.signal_clicked().connect(sigc::mem_fun(*this, &ClientRoot::onTestProperties));} void ClientRoot::onTestProperties(){   static bool sState = false;  sState = ! sState;    prop_can_save = sState;  prop_can_save_as = sState;  prop_can_undo = sState;  prop_can_redo = sState;  prop_can_cut = sState;  prop_can_copy = sState;  prop_can_paste = sState;  prop_can_delete = sState;  prop_can_select_all = sState;} Glib::PropertyProxy<bool>ClientRoot::property_can_save(){   return prop_can_save.get_proxy();}Glib::PropertyProxy<bool>ClientRoot::property_can_save_as(){  return prop_can_save_as.get_proxy();}...

信号连接方法如下：

m_ClientRoot.property_can_save().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanSaveChanged));  m_ClientRoot.property_can_save_as().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanSaveAsChanged));  m_ClientRoot.property_can_undo().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanUndoChanged));  m_ClientRoot.property_can_redo().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanRedoChanged));  m_ClientRoot.property_can_cut().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanCutChanged));  m_ClientRoot.property_can_copy().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanCopyChanged));  m_ClientRoot.property_can_paste().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanPasteChanged));  m_ClientRoot.property_can_delete().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanDeleteChanged));                   m_ClientRoot.property_can_select_all().signal_changed().connect(      sigc::mem_fun(*this, &SampleWindow::onCanSelectAllChanged));

回调函数只是简单的更改action的sensitivity，如下：

void SampleWindow::onCanSaveChanged(){       Glib::RefPtr<Gtk::Action> action = m_refNormalActionGroup->get_action("FileSave");  g_assert(action != 0);  action->set_sensitive(m_ClientRoot.property_can_save().get_value());}

效果图如下