Don't use hard coded path for knob image, use bundle-path from lv2 host

CMakeLists.txt

@@ -50,11 +50,6 @@ target_link_libraries(drmr_ui ${LV2_LIBRARIES} ${GTK2_LIBRARIES} ${SNDFILE_LIBRA
 
 add_definitions ( -DPIC )
 
-set_target_properties (drmr_ui 
-  PROPERTIES 
-  DEFINE_SYMBOL "INSTALL_DIR=\"${CMAKE_INSTALL_PREFIX}/${LV2_INSTALL_DIR}\""
-)
-
 if (NOT USE_NKNOB)
   set_target_properties (drmr_ui
     PROPERTIES
@@ -82,7 +77,7 @@ set_target_properties ( htest
 target_link_libraries(knobt ${LV2_LIBRARIES} ${GTK2_LIBRARIES} ${SNDFILE_LIBRARIES} ${SAMPLERATE_LIBRARIES} ${EXPAT_LIBRARIES} m)
 set_target_properties ( knobt
   PROPERTIES
-  COMPILE_FLAGS "-D_TEST_N_KNOB -DINSTALL_DIR=\\\"${CMAKE_INSTALL_PREFIX}/${LV2_INSTALL_DIR}\\\""
+  COMPILE_FLAGS "-D_TEST_N_KNOB"
 )
 
 # config install

drmr_ui.c

@@ -40,6 +40,8 @@ typedef struct {
   GtkWidget** pan_sliders;
   float *gain_vals,*pan_vals;
 
+  gchar *bundle_path;
+
   int cols;
 
   int samples;
@@ -101,6 +103,7 @@ static void fill_sample_table(DrMrUi* ui, int samples, char** names,GtkWidget**
     slide_expand = true;
 #else
     gain_slider = n_knob_new_with_range(0.0,GAIN_MIN,6.0,1.0);
+    n_knob_set_load_prefix(N_KNOB(gain_slider),ui->bundle_path);
     gtk_widget_set_has_tooltip(gain_slider,TRUE);
     slide_expand = false;
 #endif
@@ -119,6 +122,7 @@ static void fill_sample_table(DrMrUi* ui, int samples, char** names,GtkWidget**
     gtk_scale_add_mark(GTK_SCALE(pan_slider),0.0,GTK_POS_TOP,NULL);
 #else
     pan_slider = n_knob_new_with_range(0.0,-1.0,1.0,0.1);
+    n_knob_set_load_prefix(N_KNOB(pan_slider),ui->bundle_path);
     gtk_widget_set_has_tooltip(pan_slider,TRUE);
 #endif
     if (pan_sliders) pan_sliders[si] = pan_slider;
@@ -326,6 +330,7 @@ instantiate(const LV2UI_Descriptor*   descriptor,
   ui->drmr_widget = NULL;
   ui->curKit = -1;
   ui->samples = 0;
+  ui->bundle_path = g_strdup(bundle_path);
   *widget = NULL;
 
   build_drmr_ui(ui);
@@ -359,6 +364,7 @@ static void cleanup(LV2UI_Handle handle) {
     gtk_widget_destroy(ui->drmr_widget);
   if (ui->gain_sliders) free(ui->gain_sliders);
   if (ui->pan_sliders) free(ui->pan_sliders);
+  g_free(ui->bundle_path);
   free_kits(ui->kits);
   free(ui);
 }

nknob.c

@@ -158,6 +158,7 @@ static void n_knob_init (NKnob *knob) {
   knob->saved_x = knob->saved_y = 0;
   knob->size = KNOB_SIZE;
   knob->pixbuf = NULL;
+  knob->load_prefix = NULL;
   g_signal_connect(G_OBJECT(knob),"query-tooltip",G_CALLBACK(tooltip_callback),NULL);
 }
 
@@ -204,6 +205,14 @@ GtkWidget* n_knob_new_with_range (gdouble value, gdouble lower,
   return n_knob_new (adj);
 }
 
+void   n_knob_set_load_prefix(NKnob* knob, gchar* prefix) {
+  knob->load_prefix = g_strdup(prefix);
+}
+gchar* n_knob_get_load_prefix(NKnob* knob) {
+  return knob->load_prefix;
+}
+
+
 static void n_knob_destroy(GtkObject *object) {
   NKnob *knob;
 
@@ -213,6 +222,9 @@ static void n_knob_destroy(GtkObject *object) {
   knob = N_KNOB(object);
   knob->pixbuf = NULL;
 
+  if (knob->load_prefix) g_free(knob->load_prefix);
+  knob->load_prefix = NULL;
+
   if (GTK_OBJECT_CLASS(parent_class)->destroy)
     (*GTK_OBJECT_CLASS(parent_class)->destroy)(object);
 }
@@ -244,8 +256,16 @@ static void n_knob_realize(GtkWidget *widget) {
    * set local pixbuf pointer to global
    * set last pixbuf pointer to NULL */
   if(pixbuf[i] == NULL){
-    pixbuf[i] = gdk_pixbuf_new_from_file_at_size(INSTALL_DIR"/drmr.lv2/knob.png",
-						 52*knob->size,knob->size,&gerror);
+    gchar* path;
+    if (knob->load_prefix)
+      path = g_build_path("/",knob->load_prefix,"knob.png",NULL);
+    else {
+      g_warning("Trying to show knob with no load prefix, looking only in cwd\n");
+      path = "knob.png";
+    }
+    pixbuf[i] = gdk_pixbuf_new_from_file_at_size(path,52*knob->size,knob->size,&gerror);
+    if (knob->load_prefix)
+      g_free(path);
     knob->pixbuf = pixbuf[i];
     pixbuf=g_realloc(pixbuf,sizeof(GdkPixbuf *) * (i+2));
     pixbuf[i+1] = NULL;                                                 
@@ -558,6 +578,7 @@ int main(int argc, char* argv[]) {
 
   /*  knob */
   knob = n_knob_new_with_range (-90, -90, 0, 1);
+  n_knob_set_load_prefix(N_KNOB(knob),"../");
   gtk_box_pack_start (GTK_BOX (vbox), knob, TRUE, FALSE, 0);
   g_signal_connect (G_OBJECT (knob), "change-value",
                     G_CALLBACK (changed_callback), NULL);

nknob.h

@@ -52,6 +52,9 @@ typedef struct _NKnobClass   NKnobClass;
 struct _NKnob {
   GtkRange range;
 
+  /* image prefix */
+  gchar *load_prefix;
+
   /* State of widget (to do with user interaction) */
   guint8 state;
   gint saved_x, saved_y;
@@ -76,6 +79,9 @@ GtkWidget* n_knob_new_with_range (double value,
 				  double upper,
 				  double step);
 
+void   n_knob_set_load_prefix(NKnob* knob, gchar* prefix);
+gchar* n_knob_get_load_prefix(NKnob* knob);
+
 G_END_DECLS
 
 #endif