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Support showing tooltip of value.

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minor re-formatting
This commit is contained in:
Nick Lanham 2012-02-22 11:39:17 +01:00
parent 771fd5b528
commit 3da6249e55
1 changed files with 39 additions and 32 deletions
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71
nknob.c
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@ -113,11 +113,27 @@ static void n_knob_class_init (NKnobClass *klass) {
widget_class->scroll_event = n_knob_scroll; widget_class->scroll_event = n_knob_scroll;
} }
static gboolean tooltip_callback(GtkWidget *widget,
gint x,
gint y,
gboolean keyboard_mode,
GtkTooltip *tooltip,
gpointer user_data) {
if (gtk_widget_get_has_tooltip(widget)) {
gchar buf[16];
snprintf(buf,16,"%.2f",gtk_range_get_value(GTK_RANGE(widget)));
gtk_tooltip_set_text(tooltip,buf);
return TRUE;
}
return FALSE;
}
static void n_knob_init (NKnob *knob) { static void n_knob_init (NKnob *knob) {
knob->state = STATE_IDLE; knob->state = STATE_IDLE;
knob->saved_x = knob->saved_y = 0; knob->saved_x = knob->saved_y = 0;
knob->size = KNOB_SIZE; knob->size = KNOB_SIZE;
knob->pixbuf = NULL; knob->pixbuf = NULL;
g_signal_connect(G_OBJECT(knob),"query-tooltip",G_CALLBACK(tooltip_callback),NULL);
} }
@ -203,12 +219,6 @@ static void n_knob_realize(GtkWidget *widget) {
knob = N_KNOB(widget); knob = N_KNOB(widget);
/* FIXME keeps khagan from drawing knob */
if(widget->allocation.height > 1)
{
knob->size = widget->allocation.height;
}
/* init first pixbuf */ /* init first pixbuf */
if(pixbuf == NULL){ if(pixbuf == NULL){
pixbuf = g_malloc0(sizeof(GdkPixbuf *)); pixbuf = g_malloc0(sizeof(GdkPixbuf *));
@ -253,7 +263,7 @@ static inline gdouble get_adj_value(NKnob *knob, gdouble val) {
static gint n_knob_expose(GtkWidget *widget, GdkEventExpose *event) static gint n_knob_expose(GtkWidget *widget, GdkEventExpose *event)
{ {
NKnob *knob; NKnob *knob;
int dx; gint dx;
g_return_val_if_fail(widget != NULL, FALSE); g_return_val_if_fail(widget != NULL, FALSE);
g_return_val_if_fail(N_IS_KNOB(widget), FALSE); g_return_val_if_fail(N_IS_KNOB(widget), FALSE);
@ -264,48 +274,45 @@ static gint n_knob_expose(GtkWidget *widget, GdkEventExpose *event)
knob = N_KNOB(widget); knob = N_KNOB(widget);
dx = (int)(51 * get_zero_one_value(knob)) * knob->size; //xoff = widget->allocation.width/2 - knob->size/2;
dx = (gint)(51 * get_zero_one_value(knob)) * knob->size;
gdk_pixbuf_render_to_drawable_alpha( knob->pixbuf, widget->window, gdk_pixbuf_render_to_drawable_alpha( knob->pixbuf, widget->window,
dx, 0, widget->allocation.x, widget->allocation.y, dx, 0, widget->allocation.x, widget->allocation.y,
knob->size, knob->size, GDK_PIXBUF_ALPHA_FULL, 0, 0,0,0 ); knob->size, knob->size, GDK_PIXBUF_ALPHA_FULL, 0, 0,0,0 );
// gdk_draw_pixbuf(widget->window, knob->mask_gc, knob->pixbuf, return FALSE;
// dx, 0, 0, 0, knob->size, knob->size,GDK_RGB_DITHER_NONE,0,0);
return FALSE;
} }
static gint n_knob_button_press(GtkWidget *widget, GdkEventButton *event) { static gint n_knob_button_press(GtkWidget *widget, GdkEventButton *event) {
NKnob *knob; NKnob *knob;
g_return_val_if_fail(widget != NULL, FALSE); g_return_val_if_fail(widget != NULL, FALSE);
g_return_val_if_fail(N_IS_KNOB(widget), FALSE); g_return_val_if_fail(N_IS_KNOB(widget), FALSE);
g_return_val_if_fail(event != NULL, FALSE); g_return_val_if_fail(event != NULL, FALSE);
knob = N_KNOB(widget); knob = N_KNOB(widget);
switch (knob->state) { switch (knob->state) {
case STATE_IDLE: case STATE_IDLE:
switch (event->button) { switch (event->button) {
case 1: case 1:
case 2: case 2:
gtk_grab_add(widget); gtk_grab_add(widget);
knob->state = STATE_PRESSED; knob->state = STATE_PRESSED;
knob->saved_x = event->x; knob->saved_x = event->x;
knob->saved_y = event->y; knob->saved_y = event->y;
break;
default:
break;
}
break; break;
default: default:
break; break;
} }
break;
default:
break;
}
return FALSE; return FALSE;
} }
static gint n_knob_button_release(GtkWidget *widget, GdkEventButton *event) { static gint n_knob_button_release(GtkWidget *widget, GdkEventButton *event) {