number field widget

1 files changed, 28 insertions, 0 deletions

diff --git a/widget.c b/widget.c
new file mode 100644
index 0000000..8a77b8f
--- /dev/null
+++ b/widget.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+
+#include "microui.h"
+#include "widget.h"
+
+void
+init_field(Field *f) {
+	f->buf[0] = '\0';
+	f->value = 0.0;
+}
+
+/* field draws a Field widget and updates its value.
+ * It returns MU_RES_CHANGE if the value has changed. */
+int
+field(mu_Context *ctx, Field *f) {
+	double value;
+	int changed = 0;
+	if (mu_textbox(ctx, f->buf, sizeof(f->buf)) & MU_RES_CHANGE) {
+		if (sscanf(f->buf, "%lf", &value) == 1) {
+			f->value = value;
+			changed = 1;
+		} else if (f->buf[0] == '\0') {
+			f->value = 0.0;
+			changed = 1;
+		}
+	}
+	return changed ? MU_RES_CHANGE : 0;
+}