/*
 * Common callbacks for spinbuttons
 *
 * Authors:
 *   bulia byak <bulia@users.sourceforge.net>
 *   Jon A. Cruz <jon@joncruz.org>
 *
 * Copyright (C) 2013 authors
 * Copyright (C) 2003 authors
 *
 * Released under GNU GPL, read the file 'COPYING' for more information
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>

#include "ui/tools/tool-base.h"

#include "sp-widget.h"
#include "spinbutton-events.h"

gboolean spinbutton_focus_in(GtkWidget *w, GdkEventKey * /*event*/, gpointer /*data*/)
{
    gdouble *ini = static_cast<gdouble *>(g_object_get_data(G_OBJECT(w), "ini"));
    if (ini) {
        g_free(ini); // free the old value if any
    }

    // retrieve the value
    ini = g_new(gdouble, 1);
    *ini = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));

    // remember it
    g_object_set_data(G_OBJECT(w), "ini", ini);

    return FALSE; // I didn't consume the event
}

void spinbutton_undo(GtkWidget *w)
{
    gdouble *ini = static_cast<gdouble *>(g_object_get_data(G_OBJECT(w), "ini"));
    if (ini) {
        gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), *ini);
    }
}

void spinbutton_defocus(GtkWidget *container)
{
    // defocus spinbuttons by moving focus to the canvas, unless "stay" is on
    gboolean stay = GPOINTER_TO_INT(g_object_get_data(G_OBJECT(container), "stay"));
    if (stay) {
        g_object_set_data(G_OBJECT(container), "stay", GINT_TO_POINTER(FALSE));
    } else {
        GtkWidget *canvas = GTK_WIDGET(g_object_get_data(G_OBJECT(container), "dtw"));
        if (canvas) {
            gtk_widget_grab_focus(GTK_WIDGET(canvas));
        }
    }
}

gboolean spinbutton_keypress(GtkWidget *w, GdkEventKey *event, gpointer /*data*/)
{
    gboolean result = FALSE; // I didn't consume the event

    switch (Inkscape::UI::Tools::get_latin_keyval(event)) {
	case GDK_KEY_Escape: // defocus
            spinbutton_undo(w);
            spinbutton_defocus(w);
            result = TRUE; // I consumed the event
            break;
	case GDK_KEY_Return: // defocus
	case GDK_KEY_KP_Enter:
            spinbutton_defocus(w);
            result = TRUE; // I consumed the event
            break;
	case GDK_KEY_Tab:
	case GDK_KEY_ISO_Left_Tab:
            // set the flag meaning "do not leave toolbar when changing value"
            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
            result = FALSE; // I didn't consume the event
            break;

            // The following keys are processed manually because GTK implements them in strange ways
            // (increments start with double step value and seem to grow as you press the key continuously)

	case GDK_KEY_Up:
	case GDK_KEY_KP_Up:
        {
            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
            gdouble step = 0;
            gdouble page = 0;
            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
            v += step;
            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
            result = TRUE; // I consumed the event
            break;
        }
	case GDK_KEY_Down:
	case GDK_KEY_KP_Down:
        {
            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
            gdouble step = 0;
            gdouble page = 0;
            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
            v -= step;
            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
            result = TRUE; // I consumed the event
            break;
        }
	case GDK_KEY_Page_Up:
	case GDK_KEY_KP_Page_Up:
        {
            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
            gdouble step = 0;
            gdouble page = 0;
            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
            v += page;
            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
            result = TRUE; // I consumed the event
            break;
        }
	case GDK_KEY_Page_Down:
	case GDK_KEY_KP_Page_Down:
        {
            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
            gdouble v = gtk_spin_button_get_value(GTK_SPIN_BUTTON(w));
            gdouble step = 0;
            gdouble page = 0;
            gtk_spin_button_get_increments(GTK_SPIN_BUTTON(w), &step, &page);
            v -= page;
            gtk_spin_button_set_value(GTK_SPIN_BUTTON(w), v);
            result = TRUE; // I consumed the event
            break;
        }
	case GDK_KEY_z:
	case GDK_KEY_Z:
            g_object_set_data(G_OBJECT(w), "stay", GINT_TO_POINTER(TRUE));
            if (event->state & GDK_CONTROL_MASK) {
                spinbutton_undo(w);
                result = TRUE; // I consumed the event
            }
            break;
	default:
            result = FALSE;
            break;
    }

    return result;
}

/*
  Local Variables:
  mode:c++
  c-file-style:"stroustrup"
  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
  indent-tabs-mode:nil
  fill-column:99
  End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :
