Hi,
I have strange problem with gtk+. I create 3 boxes with a label and
an image for 3 buttons(and save their pointers in a Gui class to
retrieve later if needed) absolutely equally but only the first one
(Start button) is really displayed the rest 2 are not, I have checked
their pointers and they are 0 in the third file(where the boxes are
attached to the buttons, but in the second where the boxes are
created(in constructor) the boxes' pointers are correct), so I get
errors like:
(crysotherm:6727): Gtk-CRITICAL **: gtk_widget_show: assertion
`GTK_IS_WIDGET (widget)' failed
(crysotherm:6727): Gtk-CRITICAL **: gtk_container_add: assertion
`GTK_IS_WIDGET (widget)' failed
while trying to attached those boxes to the newly created buttons
(see: //simulation_page.cpp). I did use g_object_ref(); to keep the
pointers to the boxes after creation, since they are not immidietly
attached to a container, but only the first of them seems to remain...
What do I do wrong?
// gui.h
#ifndef GUI_H
#define GUI_H
#include <gtk/gtk.h>
class Gui {
public:
Gui();
~Gui();
void buildGui(void *sPtr);
GtkWidget *getRecordButtonBox();
GtkWidget *getStartButtonBox();
GtkWidget *getStopButtonBox();
GtkWidget *getScreenshotButtonBox();
private:
GtkWidget *start_button_box;
GtkWidget *stop_button_box;
GtkWidget *record_button_box;
GtkWidget *screenshot_button_box;
GtkWidget *png_label_box(gchar *png_filename, gchar *label_text);
};
#endif // GUI_H
// gui.cpp:
static gboolean delete_callback(GtkWidget *widget, GtkWidget *event,
gpointer data)
{
gtk_main_quit ();
return FALSE;
}
Gui::Gui() {
start_button_box = png_label_box("gui/icons/player_play.png", "Start");
g_object_ref(start_button_box);
stop_button_box = png_label_box("gui/icons/player_stop.png", "Stop");
g_object_ref(stop_button_box);
record_button_box =
png_label_box("gui/icons/player_record.png", "Record");
g_object_ref(record_button_box);
screenshot_button_box =
png_label_box("gui/icons/applets-screenshooter.png", "Screenshot");
g_object_ref(screenshot_button_box);
}
Gui::~Gui() {
gtk_widget_destroy(start_button_box);
gtk_widget_destroy(stop_button_box);
gtk_widget_destroy(record_button_box);
gtk_widget_destroy(screenshot_button_box);
}
void Gui::buildGui(void *sPtr) {
Surgery *s = (Surgery *) sPtr;
GtkWidget *window;
GtkWidget *notebook;
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(G_OBJECT(window), "delete_event",
G_CALLBACK(delete_callback), NULL);
gtk_container_set_border_width(GTK_CONTAINER(window), 10);
notebook = gtk_notebook_new();
gtk_notebook_set_tab_pos(GTK_NOTEBOOK(notebook), GTK_POS_TOP);
gtk_container_add(GTK_CONTAINER (window), notebook);
createSimulationPage(notebook, s);
createParametersPage(notebook, s);
createRecordPage(notebook, s);
createAboutPage(notebook);
gtk_widget_show (notebook);
gtk_widget_show(window);
gtk_main();
}
GtkWidget *Gui::getStartButtonBox() {return start_button_box;}
GtkWidget *Gui::getStopButtonBox() {return stop_button_box;}
GtkWidget *Gui::getRecordButtonBox() {return record_button_box;}
GtkWidget *Gui::getScreenshotButtonBox() {return screenshot_button_box;}
GtkWidget *Gui::png_label_box(gchar *png_filename, gchar *label_text) {
GtkWidget *box;
GtkWidget *label;
GtkWidget *image;
/* Create box for image and label */
box = gtk_hbox_new (FALSE, 0);
gtk_container_set_border_width (GTK_CONTAINER (box), 2);
/* Now on to the image stuff */
image = gtk_image_new_from_file (png_filename);
/* Create a label for the button */
label = gtk_label_new (label_text);
/* Pack the image and label into the box */
gtk_box_pack_start (GTK_BOX (box), image, FALSE, FALSE, 3);
gtk_box_pack_start (GTK_BOX (box), label, FALSE, FALSE, 3);
gtk_widget_show (image);
gtk_widget_show (label);
return box;
}
// simulation_page.cpp, displaying buttons:
// this one works
toggle_button = gtk_toggle_button_new();
gtk_widget_show (s->getGui()->getStartButtonBox());
gtk_container_add (GTK_CONTAINER (toggle_button),
s->getGui()->getStartButtonBox());
gtk_widget_show (toggle_button);
gtk_box_pack_start (GTK_BOX (boxV), toggle_button, TRUE, FALSE, 20);
g_signal_connect (G_OBJECT (toggle_button), "clicked", G_CALLBACK
(start_button_callback), (gpointer) s);
// this one doesn't work
toggle_button = gtk_toggle_button_new();
gtk_widget_show (s->getGui()->getRecordButtonBox());
gtk_container_add (GTK_CONTAINER (toggle_button),
s->getGui()->getRecordButtonBox());
gtk_widget_show (toggle_button);
gtk_box_pack_start (GTK_BOX (boxV), toggle_button, TRUE, FALSE, 0);
g_signal_connect (G_OBJECT (toggle_button), "clicked", G_CALLBACK
(record_button_callback), (gpointer) s);
// this one doesn't work
button = gtk_button_new();
gtk_widget_show(s->getGui()->getScreenshotButtonBox());
gtk_container_add(GTK_CONTAINER (button),
s->getGui()->getScreenshotButtonBox());
gtk_widget_show(button);
gtk_box_pack_start(GTK_BOX (boxV), button, TRUE, FALSE, 0);
_______________________________________________
gtk-list mailing list
gtk-list@xxxxxxxxx
http://mail.gnome.org/mailman/listinfo/gtk-list
