Draw method implemented for all Window subpackages

1 files changed, 47 insertions, 5 deletions

diff --git a/src/c_fl_double_window.cpp b/src/c_fl_double_window.cpp
index 7f29af8..ff9a596 100644
--- a/src/c_fl_double_window.cpp
+++ b/src/c_fl_double_window.cpp
@@ -4,29 +4,71 @@
 #include "c_fl_double_window.h"
 
 
+typedef void (hook)(void*);
+typedef hook* hook_p;
+
+
+
+
+class My_Double_Window : public Fl_Double_Window {
+    public:
+        using Fl_Double_Window::Fl_Double_Window;
+        friend void double_window_set_draw_hook(DOUBLEWINDOW n, void * d);
+        friend void fl_double_window_draw(DOUBLEWINDOW n);
+    protected:
+        void draw();
+        void real_draw();
+        hook_p draw_hook;
+};
+
+
+void My_Double_Window::draw() {
+    (*draw_hook)(this->user_data());
+}
+
+
+void My_Double_Window::real_draw() {
+    Fl_Double_Window::draw();
+}
+
+
+void double_window_set_draw_hook(DOUBLEWINDOW n, void * d) {
+    reinterpret_cast<My_Double_Window*>(n)->draw_hook = reinterpret_cast<hook_p>(d);
+}
+
+
+void fl_double_window_draw(DOUBLEWINDOW n) {
+    reinterpret_cast<My_Double_Window*>(n)->real_draw();
+}
+
+
+
+
 DOUBLEWINDOW new_fl_double_window(int x, int y, int w, int h, char* label) {
-    Fl_Double_Window *d = new Fl_Double_Window(x, y, w, h, label);
+    My_Double_Window *d = new My_Double_Window(x, y, w, h, label);
     return d;
 }
 
 
 DOUBLEWINDOW new_fl_double_window2(int w, int h) {
-    Fl_Double_Window *d = new Fl_Double_Window(w, h);
+    My_Double_Window *d = new My_Double_Window(w, h);
     return d;
 }
 
 
 void free_fl_double_window(DOUBLEWINDOW d) {
-    delete reinterpret_cast<Fl_Double_Window*>(d);
+    delete reinterpret_cast<My_Double_Window*>(d);
 }
 
 
+
+
 void fl_double_window_show(DOUBLEWINDOW d) {
-    reinterpret_cast<Fl_Double_Window*>(d)->show();
+    reinterpret_cast<My_Double_Window*>(d)->show();
 }
 
 
 void fl_double_window_hide(DOUBLEWINDOW d) {
-    reinterpret_cast<Fl_Double_Window*>(d)->hide();
+    reinterpret_cast<My_Double_Window*>(d)->hide();
 }