{

GtkWidget *vbox;

GtkWidget *checkShowEnv, *checkShowLeaves, *checkShowBark, *checkShowGrass;

Parameters *params;

#define UNROLL_CALLBACK(paramname)\

static void paramname##Clicked( GtkWidget *widget, gpointer data){\

Parameters *params = (Parameters *)data;\

params->rp->paramname = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(widget));\

DrawMethods::render();\

}

UNROLL_CALLBACK(showEnvelopes);

UNROLL_CALLBACK(showLeaves);

UNROLL_CALLBACK(showBark);

UNROLL_CALLBACK(showGrass);

#undef UNROLL_CALLBACK

RenderingParametersPanel(Parameters *p) {

params=p;

}

GtkWidget *createPanel()

{

GtkWidget *paramsWidget;

paramsWidget=gtk_frame_new("Rendering");

GtkTooltips *tooltips=gtk_tooltips_new();

vbox = gtk_vbox_new(FALSE,1);

gtk_container_add (GTK_CONTAINER (paramsWidget), vbox);

#define PACK_CHECKBOX(var_name, paramname,label,hint)\

var_name = gtk_check_button_new_with_label(label);\

gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(var_name),params->rp->paramname);\

g_signal_connect(var_name,"clicked",G_CALLBACK(this->paramname##Clicked),params);\

gtk_box_pack_start(GTK_BOX(vbox),var_name,FALSE,FALSE,0);\

gtk_tooltips_set_tip(tooltips,var_name,hint,NULL);\

gtk_widget_show(var_name);

PACK_CHECKBOX(checkShowEnv,showEnvelopes,"Show envelopes","Shows tree crown envelopes");

PACK_CHECKBOX(checkShowLeaves,showLeaves,"Show leaves","Shows leaves on tree model");

PACK_CHECKBOX(checkShowBark,showBark,"Show bark","Shows bark texture on the trunk");

PACK_CHECKBOX(checkShowGrass,showGrass,"Show grass","Shows grass texture on the ground");

#undef PACK_CHECKBOX

gtk_widget_show(paramsWidget);

gtk_widget_show(vbox);

return paramsWidget;

}

void updatePanel()

{

gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkShowEnv), params->rp->showEnvelopes);

gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkShowLeaves), params->rp->showLeaves);

gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkShowBark), params->rp->showBark);

gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(checkShowGrass), params->rp->showGrass);

}