Update gtk116

Gtkmm3/gtk116_imagedata/src/MyWin.cc

@@ -1,8 +1,11 @@
 #include "MyWin.hh"
 #include <iostream>
+#include "image_types.hh"
 #include "winpe.xpm"
 
-MyWin::MyWin(){
+MyWin::MyWin()
+:btn_back("Background")
+{
     set_icon_name("org.gtk.daleclack");
     background.set_size_request(640,360);
     
@@ -10,10 +13,17 @@ MyWin::MyWin(){
     pixbuf = Gdk::Pixbuf::create_from_xpm_data(winpe);
     sized = pixbuf->scale_simple(640,360,Gdk::INTERP_BILINEAR);
 
+    //Add Button
+    btn_back.set_halign(Gtk::ALIGN_CENTER);
+    btn_back.set_valign(Gtk::ALIGN_CENTER);
+    m_overlay.add_overlay(btn_back);
+    btn_back.signal_clicked().connect(sigc::mem_fun(*this,&MyWin::btnback_clicked));
+
     //Set image
     gtk_image_set_from_pixbuf(background.gobj(),sized->gobj());
     get_pixel_color(320,180);
-    add(background);
+    m_overlay.add(background);
+    add(m_overlay);
     show_all_children();
     pixbuf.reset();
 }
@@ -50,3 +60,47 @@ void MyWin::get_pixel_color(int x,int y){
         std::cout<<red<<" "<<green<<" "<<blue<<" "<<alpha<<std::endl;
     }
 }
+
+void MyWin::btnback_clicked(){
+    //Initalize Dialog
+    dialog = Gtk::FileChooserNative::create("Open a image file",*this,Gtk::FILE_CHOOSER_ACTION_OPEN,
+                                            "OK","Cancel");
+    
+    //Add filter for Image files
+    auto filter_image = Gtk::FileFilter::create();
+    filter_image->set_name("Image Files");
+    if(mime_type_supported()){
+        //For systems that supports mime type, add a mime type
+        filter_image->add_mime_type("image/*");
+    }else{
+        //For Systems that not support mime type, use a supported globs
+        for(int i=0; supported_globs!=NULL && supported_globs[i]!=NULL; i++){
+            const char * glob = supported_globs[i];
+            filter_image->add_pattern(glob);
+        }
+    }
+    dialog->add_filter(filter_image);
+
+    //Filter for any files
+    auto filter_any = Gtk::FileFilter::create();
+    filter_any->set_name("Any Files");
+    filter_any->add_pattern("*");
+    dialog->add_filter(filter_any);
+
+    //Link the "reponse" signal of dialog and show dialog
+    dialog->signal_response().connect(sigc::mem_fun(*this,&MyWin::set_background));
+    dialog->show();
+}
+
+void MyWin::set_background(int response_id){
+    if(response_id == Gtk::RESPONSE_ACCEPT){
+        Glib::ustring filename = dialog->get_filename();
+        pixbuf = Gdk::Pixbuf::create_from_file(filename);
+        //Release memory of pixbuf "sized"
+        sized.reset();
+        sized = pixbuf->scale_simple(640,360,Gdk::INTERP_BILINEAR);
+        gtk_image_set_from_pixbuf(background.gobj(),sized->gobj());
+        get_pixel_color(320,180);
+    }
+    dialog.reset();
+}

Gtkmm3/gtk116_imagedata/src/MyWin.hh

@@ -7,9 +7,16 @@ class MyWin : public Gtk::Window{
         MyWin();
     private:
         //Child Widgets
+        Gtk::Overlay m_overlay;
+        Gtk::Button btn_back;
         Gtk::Image background;
         Glib::RefPtr<Gdk::Pixbuf> pixbuf;
         Glib::RefPtr<Gdk::Pixbuf> sized;
+        //Get Mouse Position
+        Glib::RefPtr<Gtk::Gesture> gesture;
         //Signal Handlers
+        Glib::RefPtr<Gtk::FileChooserNative> dialog;
         void get_pixel_color(int x,int y);
+        void btnback_clicked();
+        void set_background(int reponse_id);
 };