playlist_popup.c

xmms-1.2.10.tar.gz学习使用的就下吧

/*  XMMS - Cross-platform multimedia player
 *  Copyright (C) 1998-2001  Peter Alm, Mikael Alm, Olle Hallnas,
 *                           Thomas Nilsson and 4Front Technologies
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
#include "xmms.h"

typedef struct
{
	GtkWidget *window;
	GdkGC *gc;
	gint num_items;
	gint *nx, *ny;
	gint *sx, *sy;
	gint barx, bary;
	gint active, base;
	void (*handler) (gint item);
}
PlaylistPopup;

static PlaylistPopup *popup = NULL;

static void playlist_popup_draw(PlaylistPopup * popup)
{
	gint i;

	skin_draw_pixmap(popup->window->window, popup->gc, SKIN_PLEDIT,
			 popup->barx, popup->bary, 0, 0, 3, popup->num_items * 18);
	for (i = 0; i < popup->num_items; i++)
	{
		if (i == popup->active)
			skin_draw_pixmap(popup->window->window, popup->gc,
					 SKIN_PLEDIT, popup->sx[i], popup->sy[i],
					 3, i * 18, 22, 18);
		else
			skin_draw_pixmap(popup->window->window, popup->gc,
					 SKIN_PLEDIT, popup->nx[i], popup->ny[i],
					 3, i * 18, 22, 18);
	}
	/* FIXME: What is this flush doing here? */
	gdk_flush();
}

void playlist_popup_destroy(void)
{
	if (popup)
	{
		gdk_pointer_ungrab(GDK_CURRENT_TIME);
		gdk_flush();
		gtk_widget_destroy(popup->window);
		gdk_gc_unref(popup->gc);
		g_free(popup->nx);
		g_free(popup->ny);
		g_free(popup->sx);
		g_free(popup->sy);
		if (popup->handler && popup->active != -1)
			popup->handler(popup->active + popup->base);
		g_free(popup);
		popup = NULL;
	}
}

static void playlist_popup_expose(GtkWidget * widget, GdkEvent * event, gpointer callback_data)
{
	playlist_popup_draw(popup);
}

static void playlist_popup_motion(GtkWidget * widget, GdkEventMotion * event, gpointer callback_data)
{
	gint active;

	if (event->x >= 0 && event->x < 25 && event->y >= 0 && event->y < popup->num_items * 18)
	{
		active = event->y / 18;
		if (popup->active != active)
		{
			popup->active = active;
			playlist_popup_draw(popup);
		}
	}
	else if (popup->active != -1)
	{
		popup->active = -1;
		playlist_popup_draw(popup);
	}
}

static void playlist_popup_release(GtkWidget * widget, GdkEventButton * event, gpointer callback_data)
{
	playlist_popup_destroy();
}

void playlist_popup(gint x, gint y, gint num_items, gint * nx, gint * ny, gint * sx, gint * sy,
		    gint barx, gint bary, gint base, void (*handler) (gint item))
{
	if (popup)
		playlist_popup_destroy();
	popup = g_malloc0(sizeof (PlaylistPopup));
	popup->num_items = num_items;
	popup->nx = g_malloc0(sizeof (gint) * num_items);
	memcpy(popup->nx, nx, sizeof (gint) * num_items);
	popup->ny = g_malloc0(sizeof (gint) * num_items);
	memcpy(popup->ny, ny, sizeof (gint) * num_items);
	popup->sx = g_malloc0(sizeof (gint) * num_items);
	memcpy(popup->sx, sx, sizeof (gint) * num_items);
	popup->sy = g_malloc0(sizeof (gint) * num_items);
	memcpy(popup->sy, sy, sizeof (gint) * num_items);
	popup->barx = barx;
	popup->bary = bary;
	popup->handler = handler;
	popup->active = num_items - 1;
	popup->base = base;
	popup->window = gtk_window_new(GTK_WINDOW_POPUP);
	gtk_widget_set_app_paintable(popup->window, TRUE);
	gtk_widget_set_events(popup->window, GDK_BUTTON_MOTION_MASK | GDK_BUTTON_RELEASE_MASK | GDK_EXPOSURE_MASK);
	gtk_widget_realize(popup->window);

	gtk_widget_set_usize(popup->window, 25, num_items * 18);
	popup->gc = gdk_gc_new(popup->window->window);
	gtk_signal_connect(GTK_OBJECT(popup->window), "expose_event", GTK_SIGNAL_FUNC(playlist_popup_expose), NULL);
	gtk_signal_connect(GTK_OBJECT(popup->window), "motion_notify_event", GTK_SIGNAL_FUNC(playlist_popup_motion), NULL);
	gtk_signal_connect(GTK_OBJECT(popup->window), "button_release_event", GTK_SIGNAL_FUNC(playlist_popup_release), NULL);
	util_set_cursor(popup->window);
	gdk_window_move(popup->window->window, x - 1, y - 1);
	gtk_widget_show(popup->window);
	gdk_window_raise(popup->window->window);
	gdk_flush();
	playlist_popup_draw(popup);
	gdk_pointer_grab(popup->window->window, FALSE, GDK_BUTTON_MOTION_MASK | GDK_BUTTON_RELEASE_MASK, GDK_NONE, GDK_NONE, GDK_CURRENT_TIME);
	gdk_flush();
}