1 files changed, 77 insertions, 0 deletions
diff --git a/src/gs-review-bar.c b/src/gs-review-bar.c
new file mode 100644
index 0000000..4f58c83
--- /dev/null
+++ b/src/gs-review-bar.c
@@ -0,0 +1,77 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+ * vi:set noexpandtab tabstop=8 shiftwidth=8:
+ *
+ * Copyright (C) 2016 Canonical Ltd.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include "config.h"
+
+#include <math.h>
+
+#include "gs-review-bar.h"
+
+struct _GsReviewBar
+{
+	GtkBin		 parent_instance;
+	gdouble		 fraction;
+};
+
+G_DEFINE_TYPE (GsReviewBar, gs_review_bar, GTK_TYPE_BIN)
+
+void
+gs_review_bar_set_fraction (GsReviewBar *bar, gdouble fraction)
+{
+	g_return_if_fail (GS_IS_REVIEW_BAR (bar));
+	bar->fraction = fraction;
+}
+
+static void
+gs_review_bar_init (GsReviewBar *bar)
+{
+}
+
+static gboolean
+gs_review_bar_draw (GtkWidget *widget, cairo_t *cr)
+{
+	GtkStyleContext *context;
+	gdouble y_offset, bar_height;
+	GdkRGBA color;
+
+	context = gtk_widget_get_style_context (widget);
+
+	/* don't fill the complete height (too heavy beside GtkLabel of that height) */
+	y_offset = floor (0.15 * gtk_widget_get_allocated_height (widget));
+	bar_height = gtk_widget_get_allocated_height (widget) - (y_offset * 2);
+
+	gtk_render_background (context, cr,
+			       0, y_offset,
+			       gtk_widget_get_allocated_width (widget),
+			       bar_height);
+
+	cairo_rectangle (cr,
+			 0, y_offset,
+			 round (GS_REVIEW_BAR (widget)->fraction * gtk_widget_get_allocated_width (widget)),
+			 bar_height);
+	gtk_style_context_get_color (context, gtk_widget_get_state_flags (widget), &color);
+	cairo_set_source_rgba (cr, color.red, color.green, color.blue, color.alpha);
+	cairo_fill (cr);
+
+	return GTK_WIDGET_CLASS (gs_review_bar_parent_class)->draw (widget, cr);
+}
+
+static void
+gs_review_bar_class_init (GsReviewBarClass *klass)
+{
+	GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+	widget_class->draw = gs_review_bar_draw;
+}
+
+GtkWidget *
+gs_review_bar_new (void)
+{
+	GsReviewBar *bar;
+	bar = g_object_new (GS_TYPE_REVIEW_BAR, NULL);
+	return GTK_WIDGET (bar);
+}