static int
ol_scroll_window_compute_line_count (OlScrollWindow *scroll)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (scroll), 0);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
int font_height = ol_scroll_window_get_font_height (scroll) + priv->line_margin;
gint width, height;
gtk_window_get_size (GTK_WINDOW (scroll), &width, &height);
int line_count = height - priv->padding_y * 2 / font_height;
return line_count;
}
void
ol_scroll_window_set_text (OlScrollWindow *scroll,
const char *text)
{
ol_assert (OL_IS_SCROLL_WINDOW (scroll));
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
if (priv->text != NULL)
g_free (priv->text);
priv->text = g_strdup (text);
gtk_widget_queue_draw (GTK_WIDGET (scroll));
}
void
ol_scroll_window_set_can_seek (OlScrollWindow *scroll,
gboolean can_seek)
{
ol_assert (OL_IS_SCROLL_WINDOW (scroll));
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
if (can_seek != priv->can_seek)
{
priv->can_seek = can_seek;
ol_scroll_window_update_tooltip (scroll);
}
}
static PangoLayout*
_get_pango (OlScrollWindow *scroll, cairo_t *cr)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (scroll), NULL);
ol_assert_ret (cr != NULL, NULL);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
PangoLayout *layout = pango_cairo_create_layout (cr);
PangoFontDescription *desc = pango_font_description_from_string (priv->font_name);
pango_layout_set_font_description (layout, desc);
pango_font_description_free (desc);
return layout;
}
static cairo_t*
_get_cairo (OlScrollWindow *scroll, GtkWidget *widget)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (scroll), NULL);
ol_assert_ret (GTK_IS_WIDGET (widget), NULL);
cairo_t *cr;
cr = gdk_cairo_create (gtk_widget_get_window (widget));
cairo_save (cr);
cairo_set_operator(cr, CAIRO_OPERATOR_CLEAR);
cairo_paint(cr);
cairo_restore (cr);
return cr;
}
void
ol_scroll_window_set_progress (OlScrollWindow *scroll,
int lyric_id,
double percentage)
{
ol_assert (OL_IS_SCROLL_WINDOW (scroll));
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
gint saved_lyric_id = scroll->current_lyric_id;
scroll->current_lyric_id = lyric_id;
scroll->percentage = percentage;
if (saved_lyric_id != lyric_id ||
priv->saved_lrc_y != _calc_lrc_ypos (scroll, percentage))
gtk_widget_queue_draw (GTK_WIDGET (scroll));
}
static gboolean
ol_scroll_window_expose (GtkWidget *widget,
GdkEventExpose *event,
gpointer userdata)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (userdata), FALSE);
OlScrollWindow *scroll = OL_SCROLL_WINDOW (userdata);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
cairo_t *cr = _get_cairo (scroll, widget);
_paint_bg (scroll, cr);
if (scroll->whole_lyrics != NULL)
_paint_lyrics (scroll, cr);
else if (priv->text != NULL)
_paint_text (scroll, cr);
cairo_destroy (cr);
return FALSE;
}
static void
_paint_bg (OlScrollWindow *scroll, cairo_t *cr)
{
ol_assert (OL_IS_SCROLL_WINDOW (scroll));
ol_assert (cr != NULL);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
gint width, height;
gdk_drawable_get_size (gtk_widget_get_window (GTK_WIDGET (scroll)),
&width, &height);
cairo_save (cr);
cairo_new_path (cr);
/* Top-left */
cairo_arc (cr,
priv->corner_radius, priv->corner_radius,
priv->corner_radius,
M_PI, M_PI * 1.5);
cairo_line_to (cr, width - priv->corner_radius, 0);
/* Top-right */
cairo_arc (cr,
width - priv->corner_radius, priv->corner_radius,
priv->corner_radius,
M_PI * 1.5, M_PI * 2);
cairo_line_to (cr, width, height - priv->corner_radius);
/* Bottom-right */
cairo_arc (cr,
width - priv->corner_radius, height - priv->corner_radius,
priv->corner_radius,
0, M_PI * 0.5);
cairo_line_to (cr, priv->corner_radius, height);
/* Bottom-left */
cairo_arc (cr,
priv->corner_radius, height - priv->corner_radius,
priv->corner_radius,
M_PI * 0.5, M_PI);
cairo_close_path (cr);
cairo_set_source_rgba (cr,
priv->bg_color.r,
priv->bg_color.g,
priv->bg_color.b,
priv->bg_opacity);
cairo_fill (cr);
/* cairo_stroke (cr); */
cairo_restore (cr);
}
static gint
_calc_lrc_ypos (OlScrollWindow *scroll, double percentage)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (scroll), -1);
GtkWidget *widget = GTK_WIDGET (scroll);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
if (!GTK_WIDGET_REALIZED (widget))
return -1;
gint line_height;
line_height = ol_scroll_window_get_font_height (scroll) + priv->line_margin;
if (priv->scroll_mode == OL_SCROLL_WINDOW_BY_LINES)
{
if (percentage < 0.15)
percentage = percentage / 0.15;
else
percentage = 1;
}
return line_height * percentage;
}
static gboolean
ol_scroll_window_button_press (GtkWidget *widget,
GdkEventButton *event)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (widget), FALSE);
OlScrollWindow *scroll = OL_SCROLL_WINDOW (widget);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
if (event->button == 1) {
if (event->state & GDK_CONTROL_MASK && scroll->whole_lyrics != NULL &&
priv->can_seek)
{
ol_scroll_window_begin_seek (OL_SCROLL_WINDOW (widget), event);
}
else
{
ol_scroll_window_begin_move_resize (widget, event);
}
}
return FALSE;
}
static gboolean
ol_scroll_window_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (widget), FALSE);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (widget);
if (priv->seeking)
{
ol_scroll_window_seek (OL_SCROLL_WINDOW (widget),
event);
}
else if (event->state & GDK_CONTROL_MASK)
{
gdk_window_set_cursor (widget->window,
NULL);
}
else
{
ol_scroll_window_update_cursor (widget, event);
}
return FALSE;
}
static gboolean
ol_scroll_window_button_release (GtkWidget *widget,
GdkEventButton *event)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (widget), FALSE);
OlScrollWindow *scroll = OL_SCROLL_WINDOW (widget);
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (widget);
if (priv->seeking)
{
gint current_lyric_id, lrc_y;
gint line_height = ol_scroll_window_get_font_height (scroll) + priv->line_margin;
_calc_paint_pos (scroll, ¤t_lyric_id, &lrc_y);
gdouble percentage = (gdouble) lrc_y / (gdouble) line_height;
ol_scroll_window_end_seek (scroll);
g_signal_emit (scroll,
_signals[SEEK_SIGNAL],
0, /* detail */
(guint)current_lyric_id,
percentage);
}
return FALSE;
}
int
ol_scroll_window_get_current_lyric_id (OlScrollWindow *scroll)
{
ol_assert_ret (OL_IS_SCROLL_WINDOW (scroll), -1);
return scroll->current_lyric_id;
}
static void
_paint_lyrics (OlScrollWindow *scroll, cairo_t *cr)
{
ol_assert (OL_IS_SCROLL_WINDOW (scroll));
GtkWidget *widget = GTK_WIDGET (scroll);
ol_assert (GTK_WIDGET_REALIZED (widget));
OlScrollWindowPrivate *priv = OL_SCROLL_WINDOW_GET_PRIVATE (scroll);
int line_height = ol_scroll_window_get_font_height (scroll) + priv->line_margin;
int count = ol_scroll_window_compute_line_count (scroll);
gint width, height;
gdk_drawable_get_size (gtk_widget_get_window (GTK_WIDGET (scroll)),
&width, &height);
/* set the font */
PangoLayout *layout = _get_pango (scroll, cr);
/* paint the lyrics*/
cairo_save (cr);
cairo_new_path (cr);
cairo_rectangle (cr,
priv->padding_x, 0,
width - priv->padding_x * 2,
height - priv->padding_y * 2);
cairo_close_path (cr);
cairo_clip (cr);
int i;
gint current_lyric_id;
gint lrc_y;
_calc_paint_pos (scroll,
¤t_lyric_id,
&lrc_y);
int begin = current_lyric_id - count / 2;
int end = current_lyric_id + count / 2 + 1;
int ypos = height / 2 - lrc_y - (count / 2 + 1) * line_height;
cairo_set_source_rgb(cr,
priv->inactive_color.r,
priv->inactive_color.g,
priv->inactive_color.b);
if (scroll->whole_lyrics != NULL) {
for (i = begin; i < end; i++) {
ypos += line_height;
if (i < 0) continue;
if (i >= scroll->whole_lyrics->len)
break;
pango_layout_set_text (layout,
g_ptr_array_index (scroll->whole_lyrics, i),
-1);
cairo_save (cr);
double ratio = _get_active_color_ratio (scroll, i);
double alpha = 1.0;
if (ypos < line_height / 2.0 + priv->padding_y)
alpha = 1.0 - (line_height / 2.0 + priv->padding_y - ypos) * 1.0 / line_height * 2;
else if (ypos > height - line_height * 1.5 - priv->padding_y)
alpha = (height - line_height - priv->padding_y - ypos) * 1.0 / line_height * 2;
if (alpha < 0.0) alpha = 0.0;
cairo_set_source_rgba (cr,
priv->active_color.r * ratio +
priv->inactive_color.r * (1 - ratio),
priv->active_color.g * ratio +
priv->inactive_color.g * (1 - ratio),
priv->active_color.b * ratio +
priv->inactive_color.b * (1 - ratio),
alpha);
cairo_move_to (cr, priv->padding_x, ypos);
pango_cairo_update_layout (cr, layout);
pango_cairo_show_layout (cr, layout);
cairo_restore (cr);
}
}
g_object_unref (layout);
cairo_reset_clip (cr);
cairo_restore (cr);
}
