layout

.gitignore

@@ -0,0 +1,2 @@
+microgui
+*.o

ugui.c

@@ -215,3 +215,24 @@ int ug_end(ug_ctx_t *ctx)
 	ctx->input_text[0]      = '\0';
 	return 0;
 }
+
+/*=============================================================================*
+ *                              UI ELEMENTS                                    *
+ *=============================================================================*/
+
+#undef TEST_CTX
+#define TEST_CTX(ctx) {                                                \
+	if (!ctx) {                                                    \
+		warn("__FUNCTION__:" "trying to use a null context");  \
+		return 0;                                              \
+	}                                                              \
+}
+
+// Slider element, a rectangle with some text and another rectangle inside
+// When used with a mouse the slider moves to the clicked area and stat gets
+// updated, in that case a non-zero value gets returned
+int ug_slider(ug_ctx_t *ctx, float *stat, float min, float max)
+{
+	TEST_CTX(ctx);
+	ug_draw_rect(ctx)
+}

ugui.h

@@ -262,5 +262,115 @@ void ug_input_text(ug_ctx_t *ctx, const char *text);
 int ug_begin(ug_ctx_t *ctx);
 int ug_end(ug_ctx_t *ctx);
 
+// layout control
+// Split the layout vertically and horizontally, n times each time with the
+// supplied width/height
+
+/* Window space
+ * +-----------------------------+
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * +-----------------------------+
+ * 
+ * ug_layout_vsplit(ctx, 2, (int[]){10, 20});
+ * create two vertical zones
+ * +-----------------------------+
+ * | } 10px                      |
+ * +-----------------------------+
+ * | |> 20px                     |
+ * | |                           |
+ * +-----------------------------+
+ * |                             |
+ * |                             |
+ * |          remainder          |
+ * |                             |
+ * |                             |
+ * |                             |
+ * +-----------------------------+
+ * 
+ * ug_layout_hsplit(ctx, 3, NULL);
+ * equally spaced divisions
+ * +-----------------------------+
+ * |        |          |         |
+ * +-----------------------------+
+ * | |> 20px                     |
+ * | |                           |
+ * +-----------------------------+
+ * |                             |
+ * |                             |
+ * |          remainder          |
+ * |                             |
+ * |                             |
+ * |                             |
+ * +-----------------------------+
+ *
+ * ug_button(ctx, "ciao");
+ * ug_layout_next(ctx);  // skip second square
+ * ug_button(ctx, "quit");
+ * float val = 0.3 
+ * ug_slider(ctx, &val, 0, 1);
+ * ug_text(ctx, "lorem ipsum\ndolor et");
+ *
+ * +-----------------------------+
+ * | ciao   |          |  quit   |
+ * +-----------------------------+
+ * |     #     0.3               |
+ * |     #                       |
+ * +-----------------------------+
+ * | lorem ipsum                 |
+ * | dolor et                    |
+ * |                             |
+ * |                             |
+ * |                             |
+ * |                             |
+ * +-----------------------------+
+ *
+ * ug_layout_popup(ctx, {100x50, centrato});
+ * ug_layout_vsplit(ctx, 1, NULL);
+ * ug_button(ctx, "btn1");
+ * ug_button(ctx, "btn2");
+ *
+ * +-----------------------------+
+ * | ciao   |          |  quit   |
+ * +-----------------------------+
+ * |     #     0.3               |
+ * |     #  +----------+         |
+ * +--------|   btn1   |---------+
+ * | lorem i|          |         |
+ * | dolor e+----------+         |
+ * |        |   btn2   |         |
+ * |        |          |         |
+ * |        +----------+         |
+ * |                             |
+ * |                             |
+ * +-----------------------------+
+ */
+int ug_layout_vsplit(ug_ctx_t *ctx, int n, const int *heights);
+int ug_layout_hsplit(ug_ctx_t *ctx, int n, const int *widths);
+// popup layout, create a rectangle that sits over the view and has a higher
+// z-index, this allows it to have any position and have focus priority
+// creating a popup selects it as current layout
+int ug_layout_popup(ug_ctx_t *ctx, ug_rect_t rect);
+// get the next rectangular region in the layout context
+ug_rect_t ug_layout_next(ug_ctx_t *ctx);
+// get the current layout rectangle area, but do not pop it (select the next)
+// this is useful to get information about the area's width height and position
+ug_rect_t ug_layout_get_current(ug_ctx_t *ctx);
+// set the unit of the dimensions, in the context all units are pixels but
+// when regions are defined units can be in pixels, millimiters, etc
+int ui_layout_set_mm(ug_ctx_t *ctx);
+int ui_layout_set_px(ug_ctx_t *ctx);
+
+// ui elements
+int ug_slider(ug_ctx_t *ctx, float *stat, float min, float max);
 
 #endif