Re: How to make the toolbar button flashing

["Miroslav Rajcic" <rajcic sokrates hr>]

Hi James,
your example uses ordinary GtkButton, not the GtkToolItem and I couldn't 
make it work in my example (although I did try to fetch underlying 
GtkButton). I've now figured how to change the icon, the key is to use 
gtk_tool_button_set_icon_widget method:

img1 = gtk_image_new_from_stock( GTK_STOCK_MEDIA_PLAY, 
GTK_ICON_SIZE_SMALL_TOOLBAR);
gtk_widget_show(img1);
gtk_tool_button_set_icon_widget(GTK_TOOL_BUTTON(tool_pause), img1);

Thank you for your help.

Regards,
 Miroslav

----- Original Message ----- 
From: "James Morris" <jwm art net gmail com>
To: "Miroslav Rajcic" <rajcic sokrates hr>
Cc: <gtk-app-devel-list gnome org>
Sent: Tuesday, March 01, 2011 10:24 AM
Subject: Re: How to make the toolbar button flashing


On 1 March 2011 08:20, Miroslav Rajcic <rajcic sokrates hr> wrote:
> I am trying to make the "Pause" button flash (or show any similar 
> behaviour
> similar to that) when the pause state is active.
> So far I tried many things, but none of these seem to work:
> - changing the button background color
> - changing the button stock icon


Alternating between two different stock items is quite easy when you
know how, but I had to ask here for help.
If you have two images,

--8<---
img1 = gtk_image_new_from_stock( GTK_STOCK_MEDIA_PLAY,
GTK_ICON_SIZE_SMALL_TOOLBAR);
img2 = gtk_image_new_from_stock( GTK_STOCK_MEDIA_STOP,
GTK_ICON_SIZE_SMALL_TOOLBAR);

/* convert img1 and img2 from floating references which
are deleted when no longer in use, to a normal reference.
this prevents either of the images being deleted when we
swap the play/stop button images. unref'd after gtk_main.
*/
g_object_ref_sink(img1);
g_object_ref_sink(img2);
--8<---

then in your idle callback simply use gtk_button_set_image,
alternating between the two images every time the function is called
(ie you could use a static gboolean to track which button to show each
time).

then once gtk_main returns:
--8<---
gtk_main();

/* free the play & stop images */
g_object_unref(img1);
g_object_unref(img2);
--8<---




http://github.com/jwm-art-net/BoxySeq/blob/master/boxyseq_gui/gui_main.c









> - changing the button relief style
>
> Relevant code is following:
>
> //start timer to alternate the button state
> nBlinkButtonTimerID = g_timeout_add (900, flash_pause_button_timer, NULL);
>
> gboolean flash_pause_button_timer(gpointer data)
> {
> static bool bFlipFlop = false;
> bFlipFlop = !bFlipFlop;
>
> //get pointers to the relevant buttons
> GtkToolbar *toolbar2 = (GtkToolbar *)lookup_widget(window1, "toolbar2");
> GtkWidget *tool_pause = (GtkWidget *)gtk_toolbar_get_nth_item(toolbar2, 
> 2);
> GList *children1 = gtk_container_get_children(GTK_CONTAINER(tool_pause));
> GtkButton *button = (GtkButton *)g_list_nth_data (children1, 0);
> g_list_free(children1);
> GtkWidget *tool_stop = (GtkWidget *)gtk_toolbar_get_nth_item(toolbar2, 1);
>
> //create two alternating colors (standard bkg and black bkg)
> GtkStyle* style = gtk_rc_get_style(tool_stop);
> GdkColor rgbStart = style->bg[GTK_STATE_NORMAL];
> GdkColor rgbEnd = { 0, 0, 0, 0 };
>
> //modify color
> gtk_widget_modify_bg (GTK_WIDGET(button), GTK_STATE_NORMAL, (bFlipFlop)?
> &rgbEnd : &rgbStart);
> gtk_widget_modify_bg (GTK_WIDGET(button), GTK_STATE_ACTIVE, (bFlipFlop)?
> &rgbEnd : &rgbStart);
> gtk_widget_modify_base (GTK_WIDGET(button), GTK_STATE_NORMAL, (bFlipFlop)?
> &rgbEnd : &rgbStart);
> gtk_widget_modify_base (GTK_WIDGET(button), GTK_STATE_ACTIVE, (bFlipFlop)?
> &rgbEnd : &rgbStart);
> gtk_widget_queue_draw (GTK_WIDGET(button));
> #if GTK_CHECK_VERSION(2,18,0)
> gdk_window_process_updates (gtk_widget_get_window(GTK_WIDGET(button)),
> TRUE);
> #else
> gdk_window_process_updates (GTK_WIDGET(button)->window, TRUE);
> #endif
>
> /*
> GtkWidget *w1 =
> gtk_tool_button_get_icon_widget(GTK_TOOL_BUTTON(tool_pause));
> gtk_widget_modify_bg (w1, GTK_STATE_NORMAL, (bFlipFlop)? &rgbEnd :
> &rgbStart);
> gtk_widget_modify_bg (w1, GTK_STATE_ACTIVE, (bFlipFlop)? &rgbEnd :
> &rgbStart);
> gtk_widget_modify_base (w1, GTK_STATE_NORMAL, (bFlipFlop)? &rgbEnd :
> &rgbStart);
> gtk_widget_modify_base (w1, GTK_STATE_ACTIVE, (bFlipFlop)? &rgbEnd :
> &rgbStart);
> */
>
> //modify relief style
> gtk_button_set_relief(button, (bFlipFlop)?
> GTK_RELIEF_NORMAL:GTK_RELIEF_NONE);
>
> //modify stock icon
> gtk_tool_button_set_stock_id(GTK_TOOL_BUTTON(tool_pause), (bFlipFlop)?
> GTK_STOCK_MEDIA_PAUSE : GTK_STOCK_MEDIA_RECORD);
>
> gtk_tool_item_toolbar_reconfigured (GTK_TOOL_ITEM(tool_pause));
>
> return TRUE;
> }
>
> Why doesn't any of these work ? Any tips ?
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list gnome org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list



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