hxstatuspositionslider.cpp

linux下的一款播放器

#ifdef HELIX_FEATURE_EMBEDDED_PLAYER
        hxembedded_window_start_seeking(position_status->embedded_window);
#endif
    }
    else
    {
        hx_player_start_seeking(HX_PLAYER(status->player));
    }
}

static void
hxstatus_display_position_slider_seek_stop(HXStatusDisplayPositionSlider* position_status)
{
    guint pos;
    HXStatusDisplay* status;
    status = HX_STATUS_DISPLAY(position_status);

    pos = (guint)gtk_range_get_value(GTK_RANGE(position_status->position_scale));

    if(position_status->embedded_window)
    {
#ifdef HELIX_FEATURE_EMBEDDED_PLAYER
        hxembedded_window_stop_seeking(position_status->embedded_window, pos);
#endif
    }        
    else
    {            
        hx_player_stop_seeking(HX_PLAYER(status->player));
    }

    hxstatus_display_start_timer(status);    
}


/* Function to hook up status display to player:
 * ============================================
 */

void
hxstatus_display_position_slider_set_player(HXStatusDisplay* status, HXPlayer* player)
{
    guint i;
    guint signal; 
    HXStatusDisplayPositionSlider* status_position_slider = HX_STATUS_DISPLAY_POSITION_SLIDER(status);    

    static const struct
    {
        const gchar* name;
        GCallback callback;
    } signal_map[] = 
    {
        { "play",           G_CALLBACK(hsdp_play)           },
        { "pause",          G_CALLBACK(hsdp_pause)          },
        { "stop",           G_CALLBACK(hsdp_stop)           },
        { "seek",           G_CALLBACK(hsdp_seek)           },
        { "length_changed", G_CALLBACK(hsdp_length_changed) }        
    };

    /* Disconnect from the old player, if any */    
    if(status->player)
    {
        for(i = 0; i < status_position_slider->player_signal_handlers_array_len; i++)
        {
            signal = g_array_index(status_position_slider->player_signal_handlers_array, gint, i);
            g_signal_handler_disconnect(G_OBJECT(status->player), signal);
                                        
        }
    }        

    status_position_slider->player_signal_handlers_array_len = 0;

    if(player)
    {
        /* Connect the new player */
        for(i = 0; i < sizeof(signal_map) / sizeof(*signal_map); i++)
        {    
            /* Hook up to the new player */
            signal = g_signal_connect_swapped(G_OBJECT(player),
                                              signal_map[i].name,
                                              signal_map[i].callback,
                                              status);

            g_array_insert_val(status_position_slider->player_signal_handlers_array,
                               status_position_slider->player_signal_handlers_array_len,
                               signal);
            status_position_slider->player_signal_handlers_array_len++;
        }
    }

    HX_STATUS_DISPLAY_CLASS(g_parent_class)->set_player(status, player);

    if(player)
    {
        guint interval;
        interval = hxstatus_display_position_slider_get_update_interval(status_position_slider);
        
        hxstatus_display_set_timer(status,
                                   interval,
                                   hxstatus_display_position_slider_update,
                                   status,
                                   TRUE,
                                   TRUE);
    }
}

static gboolean
hsdp_button_press(HXStatusDisplayPositionSlider* position_status,
                  GdkEvent *event)
{
    GdkEventButton* button_event = &event->button;
    
    if(button_event->button == 1)
    {    
        position_status->button_1_is_pressed = TRUE;

        /* propagate this to the slider as a button 2 press,
           as that is the behavior we want to emulate. */
        GdkEvent fake_button_press = *event;
        fake_button_press.button.button = 2;

        GtkHScaleClass* klass;
        klass = GTK_HSCALE_GET_CLASS(position_status->position_scale);
        GTK_WIDGET_CLASS(klass)->button_press_event(position_status->position_scale, &fake_button_press.button);        

        return TRUE;            
    }
    else if(button_event->button == 2)
    {
        return TRUE; // block button 2 presses
    }
    
    return FALSE; // propagate
}

static gboolean
hsdp_button_release(HXStatusDisplayPositionSlider* position_status,
                    GdkEvent *event)
{
    GdkEventButton* button_event = &event->button;

    if(button_event->button == 1)
    {
        GdkEvent fake_button_press = *event;
        fake_button_press.button.button = 2;

        /* Propagate as a button 2 release to match above */
        GtkHScaleClass* klass;
        klass = GTK_HSCALE_GET_CLASS(position_status->position_scale);
        GTK_WIDGET_CLASS(klass)->button_release_event(position_status->position_scale,
                                                      &fake_button_press.button);
        return TRUE;
    }
    else if(button_event->button == 2)
    {
        return TRUE; // block button 2 releases
    }

    return FALSE; // propagate
}

static void
hsdp_event_after(HXStatusDisplayPositionSlider* position_status,
                 GdkEvent *event)
{
    if(event->type == GDK_BUTTON_RELEASE)
    {
        GdkEventButton* button_event;
        button_event = (GdkEventButton*)event;
        
        if(button_event->button == 1)
        {    
            position_status->button_1_is_pressed = FALSE;

            if(position_status->seek_started)
            {
                hxstatus_display_position_slider_seek_stop(position_status);
                position_status->seek_started = FALSE;
            }
        }    
    }
}

static void
hsdp_value_changed(HXStatusDisplayPositionSlider* position_status)
{
    HXStatusDisplay* status = HX_STATUS_DISPLAY(position_status);
    
    if(position_status->button_1_is_pressed &&
       !position_status->seek_started)
    {
        hxstatus_display_position_slider_seek_start(position_status);
        position_status->seek_started = TRUE;
    }

    if(position_status->seek_started)
    {
        guint pos;
        pos = (guint)gtk_range_get_value(GTK_RANGE(position_status->position_scale));
        hx_player_set_position(HX_PLAYER(status->player), pos);
    }
}

static void
hsdp_play(HXStatusDisplayPositionSlider* position_status)
{
    HXStatusDisplay* status;
    gboolean is_live_or_infinite;

    status = HX_STATUS_DISPLAY(position_status);

    is_live_or_infinite = hx_player_is_live(status->player) ||
                          hx_player_is_indefinite_duration(status->player);
        
    gtk_widget_set_sensitive(position_status->position_scale, !is_live_or_infinite);
}

static void
hsdp_pause(HXStatusDisplayPositionSlider* position_status)
{
    HXStatusDisplay* status;
    gboolean is_live_or_infinite;

    status = HX_STATUS_DISPLAY(position_status);

    is_live_or_infinite = hx_player_is_live(status->player) ||
                          hx_player_is_indefinite_duration(status->player);
    
    gtk_widget_set_sensitive(position_status->position_scale, !is_live_or_infinite);
}

static void
hsdp_stop(HXStatusDisplayPositionSlider* position_status)
{
    HXStatusDisplay* status;

    status = HX_STATUS_DISPLAY(position_status);
    
    gtk_widget_set_sensitive(position_status->position_scale, FALSE);
}

static void
hsdp_seek(HXStatusDisplayPositionSlider* status, guint pos)
{
    gtk_range_set_value(GTK_RANGE(status->position_scale), (gdouble)pos);
}

void
hsdp_length_changed(HXStatusDisplayPositionSlider* status, guint /*len*/)
{
    /* Update the timer interval */
    guint interval;
    interval = hxstatus_display_position_slider_get_update_interval(status);
    hxstatus_display_change_timer_interval(HX_STATUS_DISPLAY(status), interval);
}