Cleaned up the grid code.

include/dawn/dawn.h

@@ -70,6 +70,8 @@
 
 
 // User Interface Objects
+#include "ui/grid.h"
+
 #include "ui/frame.h"
 #include "ui/image.h"
 #include "ui/label.h"

include/dawn/ui/grid.h

@@ -0,0 +1,72 @@
+/**
+ * Copyright (c) 2021 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#pragma once
+#include "../libs.h"
+
+/** Maximum number of breakpoints a grid can support */
+#define GRID_BREAKPOINT_COUNT 4
+
+/** Max number of children that a grid can support */
+#define GRID_CHILD_COUNT 32
+
+/** Definition of a breakpoint */
+typedef struct {
+  float width;
+} breakpointsize_t;
+
+/** Definition of a grid breakpoint */
+typedef struct {
+  uint8_t rows;
+  uint8_t columns;
+  float gutterX;
+  float gutterY;
+} gridbreakpoint_t;
+
+/** Callback to receive when a grid child is to be resized */
+typedef void gridchildresizecallback_t(
+  void *user, int32_t i,
+  float screenWidth, float screenHeight,
+  float x, float y,
+  float width, float height
+);
+
+/** Definition of a grid child's breakpoint */
+typedef struct {
+  uint8_t columns;
+  uint8_t rows;
+  uint8_t x;
+  uint8_t y;
+} gridchildbreakpoint_t;
+
+/** Definition of a grid child */
+typedef struct {
+  gridchildbreakpoint_t breakpoints[GRID_BREAKPOINT_COUNT];
+  uint8_t breakpointCount;
+  gridchildresizecallback_t *onResize;
+} gridchild_t;
+
+/** Definitio of a grid */
+typedef struct {
+  /** Breakpoints */
+  gridbreakpoint_t breakpoints[GRID_BREAKPOINT_COUNT];
+  breakpointsize_t breakpointSizes[GRID_BREAKPOINT_COUNT];
+  uint8_t breakpointCount;
+
+  /** Child items of the grid */
+  gridchild_t children[GRID_CHILD_COUNT];
+  uint8_t childCount;
+
+  /** Internal size reference, used for caching resize events */
+  float width;
+  float height;
+  float x;
+  float y;
+
+  /** Pointer to any custom user data */
+  void *user;
+} grid_t;