3 files changed, 16 insertions, 1 deletions
diff --git a/main.c b/main.c
index cc1620f..220abe6 100644
--- a/main.c
+++ b/main.c
@@ -12,6 +12,7 @@
 #include "engine.h"
 #include "ui.h"
 #include "color.h"
+#include "eprintf.h"
 
 
 /* Macros. */
@@ -386,8 +387,14 @@ mass_flow_rate_corrected_row(mu_Context *ctx, UI *ui) {
 
 static void
 comp_select(mu_Context *ctx, UI *ui) {
+	const Compressor *comp;
+
 	if (w_select_compressor(ctx, &ui->comp_select) & MU_RES_CHANGE) {
-		/* TODO */
+		comp = &ui->comps[ui->comp_select.idx];
+		if (w_canvas_set_bg(&ui->comp_img, comp->imgfile) != 0) {
+			weprintf("failed to set compressor image: %s", comp->imgfile);
+		}
+		compute_all(ui);
 	}
 }
 
diff --git a/widget.c b/widget.c
index cca3415..613d834 100644
--- a/widget.c
+++ b/widget.c
@@ -396,3 +396,10 @@ w_clear_canvas(w_Canvas *canvas) {
 	r_clear_canvas(canvas->id);
 	canvas->dirty = 1;
 }
+
+/* Set the background image of the canvas. Returns non-zero on error. */
+int
+w_canvas_set_bg(w_Canvas *canvas, const char *path) {
+	r_remove_canvas(canvas->id);
+	return w_init_canvas(canvas, path);
+}
diff --git a/widget.h b/widget.h
index 98f592c..802e8ba 100644
--- a/widget.h
+++ b/widget.h
@@ -87,3 +87,4 @@ void w_free_canvas(w_Canvas *c);
 void w_canvas(mu_Context *ctx, w_Canvas *canvas);
 void w_canvas_draw_circle(w_Canvas *canvas, int x, int y, int r, mu_Color color);
 void w_clear_canvas(w_Canvas *canvas);
+int w_canvas_set_bg(w_Canvas *canvas, const char *path);