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authorDavid Robillard <d@drobilla.net>2012-04-13 19:53:15 +0000
committerDavid Robillard <d@drobilla.net>2012-04-13 19:53:15 +0000
commit42a71dbe65d93821c5f1b6adedd0e7435ca8b004 (patch)
tree11a5ec7c0f6e035ad17ace3bd3af57d66bdb4d3c /src/jalv_gtk2.c
parent5695a60ef02918f3fe6183085908de71b6e024da (diff)
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Logarithmic slider support from Nick Lanham.
git-svn-id: http://svn.drobilla.net/lad/trunk/jalv@4182 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/jalv_gtk2.c')
-rw-r--r--src/jalv_gtk2.c52
1 files changed, 45 insertions, 7 deletions
diff --git a/src/jalv_gtk2.c b/src/jalv_gtk2.c
index eee16ac..5e2da3f 100644
--- a/src/jalv_gtk2.c
+++ b/src/jalv_gtk2.c
@@ -18,6 +18,8 @@
#include <gtk/gtk.h>
+#include "lv2/lv2plug.in/ns/ext/port-props/port-props.h"
+
#include "jalv_internal.h"
static void
@@ -248,6 +250,13 @@ slider_changed(GtkRange* range, gpointer data)
return FALSE;
}
+static gboolean
+log_slider_changed(GtkRange* range, gpointer data)
+{
+ ((struct Port*)data)->control = expf(gtk_range_get_value(range));
+ return FALSE;
+}
+
static void
combo_changed(GtkComboBox* box, gpointer data)
{
@@ -280,6 +289,12 @@ scale_format(GtkScale* scale, gdouble value, gpointer user_data)
g_strdup_printf("%0.*f", gtk_scale_get_digits(scale), value);
}
+static gchar*
+log_scale_format(GtkScale* scale, gdouble value, gpointer user_data)
+{
+ return g_strdup_printf("%0.6g", exp(gtk_range_get_value(GTK_RANGE(scale))));
+}
+
static gint
dcmp(gconstpointer a, gconstpointer b)
{
@@ -319,6 +334,24 @@ make_combo(struct Port* port, GHashTable* points, int deft)
}
static GtkWidget*
+make_log_slider(struct Port* port, GHashTable* points,
+ float min, float max, float deft)
+{
+ float lmin = logf(min);
+ float lmax = logf(max);
+ float ldft = logf(deft);
+ GtkWidget* slider = gtk_hscale_new_with_range(lmin, lmax, 0.001);
+ gtk_scale_set_digits(GTK_SCALE(slider), 6);
+ gtk_range_set_value(GTK_RANGE(slider), ldft);
+ g_signal_connect(G_OBJECT(slider),
+ "format-value", G_CALLBACK(log_scale_format), points);
+ g_signal_connect(G_OBJECT(slider),
+ "value-changed", G_CALLBACK(log_slider_changed), port);
+
+ return slider;
+}
+
+static GtkWidget*
make_slider(struct Port* port, GHashTable* points,
bool is_int, float min, float max, float deft)
{
@@ -354,6 +387,7 @@ build_control_widget(Jalv* jalv, GtkWidget* window)
LilvNode* lv2_integer = lilv_new_uri(jalv->world, LV2_CORE__integer);
LilvNode* lv2_toggled = lilv_new_uri(jalv->world, LV2_CORE__toggled);
LilvNode* lv2_enum = lilv_new_uri(jalv->world, LV2_CORE__enumeration);
+ LilvNode* lv2_log = lilv_new_uri(jalv->world, LV2_PORT_PROPS__logarithmic);
LilvNode* rdfs_comment = lilv_new_uri(jalv->world, LILV_NS_RDFS "comment");
GtkWidget* port_table = gtk_table_new(jalv->num_ports, 2, false);
float* defaults = calloc(jalv->num_ports, sizeof(float));
@@ -389,18 +423,22 @@ build_control_widget(Jalv* jalv, GtkWidget* window)
}
/* Make control */
- GtkWidget* control = NULL;
+ GtkWidget* control = NULL;
+ bool is_integer = lilv_port_has_property(
+ jalv->plugin, port, lv2_integer);
if (lilv_port_has_property(jalv->plugin, port, lv2_toggled)) {
control = make_toggle(&jalv->ports[i], defaults[i]);
} else if (lilv_port_has_property(jalv->plugin, port, lv2_enum)
- || (lilv_port_has_property(jalv->plugin, port, lv2_integer)
- && points)) {
+ || (is_integer && points &&
+ (g_hash_table_size(points)
+ == (unsigned)(maxs[i] - mins[i] + 1)))) {
control = make_combo(&jalv->ports[i], points, defaults[i]);
+ } else if (lilv_port_has_property(jalv->plugin, port, lv2_log)) {
+ control = make_log_slider(&jalv->ports[i], points,
+ mins[i], maxs[i], defaults[i]);
} else {
- control = make_slider(
- &jalv->ports[i], points,
- lilv_port_has_property(jalv->plugin, port, lv2_integer),
- mins[i], maxs[i], defaults[i]);
+ control = make_slider(&jalv->ports[i], points, is_integer,
+ mins[i], maxs[i], defaults[i]);
}
jalv->ports[i].widget = control;