Finalise implementing compositor behaviour using immediate mode UI

include/nodes.h

@@ -2,6 +2,7 @@
 #define NODES_H
 
 #include "aliases/aliases.h"
+#include "ui.h"
 #include "window.h"
 
 #define MAX_NODES 1024
@@ -24,6 +25,8 @@ union node_data {
 };
 
 struct node {
+  rect_t rect;
+  ui_elem_colours_t colours;
   node_type_t type;
   node_data_t data;
 };

include/ui.h

@@ -31,6 +31,12 @@ struct ui_elem {
   ui_elem_type_t type;
 };
 
+typedef struct ui_elem_colours ui_elem_colours_t;
+struct ui_elem_colours {
+  colour_t fill;
+  colour_t border;
+};
+
 struct ui_ctx {
   u64 count;
   i64 hovered;
@@ -49,7 +55,9 @@ void init_ui_ctx(ui_ctx_t *ctx);
 void reset_ui_ctx(ui_ctx_t *ctx);
 void handle_ui_events(const window_t *wnd, ui_ctx_t *ctx,
                       const SDL_Event *event);
-bool button(const window_t *wnd, ui_ctx_t *ctx, rect_t rect);
-rect_t node(const window_t *wnd, ui_ctx_t *ctx, rect_t rect);
+bool button(const window_t *wnd, ui_ctx_t *ctx, rect_t rect,
+            ui_elem_colours_t colours);
+rect_t node(const window_t *wnd, ui_ctx_t *ctx, rect_t rect,
+            ui_elem_colours_t colours);
 
 #endif // !UI_H

src/compositor.c

@@ -21,10 +21,6 @@ struct compositor {
   u32 active_window;
   SDL_Event event;
   bool running;
-  u64 mouse_x;
-  u64 mouse_y;
-  u64 last_clicked_mouse_x;
-  u64 last_clicked_mouse_y;
   i64 node_hovered;
   u64 count;
   node_t *nodes;
@@ -33,7 +29,7 @@ struct compositor {
 };
 
 void add_node(compositor_t *comp, node_type_t type, node_data_t data, i32 x,
-              i32 y);
+              i32 y, ui_elem_colours_t colours);
 
 i32 run_main_loop(void) {
   if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {
@@ -65,6 +61,20 @@ i32 run_main_loop(void) {
   SDL_EventState(SDL_DROPFILE, SDL_ENABLE);
 
   colour_t bg_colour = {.abgr = 0xffffffff};
+  ui_elem_colours_t button_colours = (ui_elem_colours_t){
+      .fill = (colour_t){.abgr = 0xff89a83c},
+      .border = (colour_t){.abgr = 0xff768432},
+  };
+  ui_elem_colours_t io_node_colours = (ui_elem_colours_t){
+      .fill = (colour_t){.abgr = 0xff2c84b7},
+      .border = (colour_t){.abgr = 0xff315c89},
+  };
+  ui_elem_colours_t op_node_colours = (ui_elem_colours_t){
+      .fill = (colour_t){.abgr = 0xffad6c3a},
+      .border = (colour_t){.abgr = 0xff8e4a33},
+  };
+
+  i32 toolbox_button_x = (toolbox->width - BUTTON_WIDTH) / 2;
 
   while (comp.running) {
     while (SDL_PollEvent(&(comp.event))) {
@@ -105,6 +115,15 @@ i32 run_main_loop(void) {
         }
 
         break;
+      case SDL_DROPFILE:
+        if (comp.event.drop.windowID == main_window->id) {
+          node_data_t data = (node_data_t){.path = comp.event.drop.file};
+
+          add_node(&comp, NODE_TYPE_IO, data, comp.ctx.mouse_x,
+                   comp.ctx.mouse_y, io_node_colours);
+
+          break;
+        }
       }
     }
 
@@ -112,6 +131,27 @@ i32 run_main_loop(void) {
       clear_window(&(comp.windows[i]), bg_colour);
     }
 
+    for (u64 i = 0; i < COUNT_COMP_OPS; ++i) {
+      rect_t rect = {
+          .topleft.x = toolbox_button_x,
+          .topleft.y = i * (BUTTON_HEIGHT + 20) + 30,
+          .w = BUTTON_WIDTH,
+          .h = BUTTON_HEIGHT,
+      };
+
+      if (button(toolbox, &(comp.ctx), rect, button_colours)) {
+        node_data_t data = (node_data_t){.func = ops[i]};
+
+        add_node(&comp, NODE_TYPE_OP, data, comp.ctx.mouse_x, comp.ctx.mouse_y,
+                 op_node_colours);
+      }
+    }
+
+    for (u64 i = 0; i < comp.count; ++i) {
+      comp.nodes[i].rect = node(main_window, &(comp.ctx), comp.nodes[i].rect,
+                                comp.nodes[i].colours);
+    }
+
     for (u64 i = 0; i < MAX_WINDOWS; ++i) {
       swap_buffers(&(comp.windows[i]));
     }
@@ -119,156 +159,6 @@ i32 run_main_loop(void) {
     reset_ui_ctx(&(comp.ctx));
   }
 
-#if 0
-  i32 button_x = (toolbox->width - BUTTON_WIDTH) / 2;
-  for (u64 i = 0; i < COUNT_COMP_OPS; ++i) {
-    comp.buttons[i] = (button_t){.rect = (rect_t){
-                                     .topleft.x = button_x,
-                                     .topleft.y = i * (BUTTON_HEIGHT + 20) + 30,
-                                     .w = BUTTON_WIDTH,
-                                     .h = BUTTON_HEIGHT,
-                                 }};
-  }
-
-  while (comp.running) {
-    while (SDL_PollEvent(&(comp.event))) {
-      switch (comp.event.type) {
-      case SDL_QUIT:
-        comp.running = false;
-        break;
-      case SDL_WINDOWEVENT:
-        switch (comp.event.window.event) {
-        case SDL_WINDOWEVENT_CLOSE:
-          comp.running = false;
-          break;
-        case SDL_WINDOWEVENT_ENTER: {
-          u32 id = comp.event.window.windowID;
-          window_t *wnd = NULL;
-
-          for (u64 i = 0; i < MAX_WINDOWS; ++i) {
-            window_t *window = &(comp.windows[i]);
-
-            if (id == window->id) {
-              wnd = window;
-              break;
-            }
-          }
-
-          if (!wnd) {
-            break;
-          }
-
-          SDL_RaiseWindow(wnd->window);
-
-          break;
-        }
-        }
-
-        break;
-      case SDL_MOUSEBUTTONDOWN:
-        if (comp.event.button.windowID == main_window->id) {
-          if (comp.node_hovered != -1) {
-            comp.move_node = true;
-          }
-
-          comp.last_clicked_mouse_x = comp.event.button.x;
-          comp.last_clicked_mouse_y = comp.event.button.y;
-
-          break;
-        } else if (comp.event.button.windowID == toolbox->id) {
-          if (comp.button_hovered != -1) {
-            comp.button_clicked = comp.button_hovered;
-          }
-
-          break;
-        }
-      case SDL_MOUSEBUTTONUP:
-        comp.move_node = false;
-
-        if (comp.event.button.windowID == toolbox->id) {
-          if (comp.button_hovered >= 0 &&
-              comp.button_hovered == comp.button_clicked) {
-            add_node(&comp, NODE_TYPE_OP,
-                     (node_data_t){.func = ops[comp.button_hovered]},
-                     comp.last_clicked_mouse_x, comp.last_clicked_mouse_y);
-          }
-
-          comp.button_clicked = -1;
-        }
-
-        break;
-      case SDL_MOUSEMOTION:
-        comp.button_hovered = -1;
-
-        if (comp.event.motion.windowID == main_window->id) {
-          comp.mouse_x = comp.event.motion.x;
-          comp.mouse_y = comp.event.motion.y;
-
-          if (comp.move_node) {
-            i32 dx = comp.event.motion.xrel;
-            i32 dy = comp.event.motion.yrel;
-
-            node_t *node = &(comp.nodes[comp.node_hovered]);
-
-            node->rect.topleft.x += dx;
-            node->rect.topleft.y += dy;
-          } else {
-            comp.node_hovered = -1;
-
-            for (u64 i = comp.count - 1; i >= 0; --i) {
-              rect_t *rect = &(comp.nodes[i].rect);
-
-              if (aabb(rect, comp.mouse_x, comp.mouse_y)) {
-                comp.node_hovered = i;
-                break;
-              }
-            }
-          }
-
-          break;
-        } else if (comp.event.motion.windowID == toolbox->id) {
-          for (u64 i = COUNT_COMP_OPS - 1; i >= 0; --i) {
-            rect_t *rect = &(comp.buttons[i].rect);
-
-            if (aabb(rect, comp.event.motion.x, comp.event.motion.y)) {
-              comp.button_hovered = i;
-              break;
-            }
-          }
-
-          break;
-        }
-      case SDL_DROPFILE:
-        if (comp.event.drop.windowID == main_window->id) {
-          node_data_t data = (node_data_t){.path = comp.event.drop.file};
-
-          add_node(&comp, NODE_TYPE_IO, data, comp.mouse_x, comp.mouse_y);
-
-          break;
-        }
-      }
-    }
-
-    for (u64 i = 0; i < MAX_WINDOWS; ++i) {
-      clear_window(&(comp.windows[i]), bg_colour);
-    }
-
-    for (u64 i = 0; i < comp.count; ++i) {
-      node_t *node = &(comp.nodes[i]);
-      draw_node(main_window, node);
-    }
-
-    for (u64 i = 0; i < COUNT_COMP_OPS; ++i) {
-      button_t *button = &(comp.buttons[i]);
-      draw_button(toolbox, button);
-    }
-
-    for (u64 i = 0; i < MAX_WINDOWS; ++i) {
-      swap_buffers(&(comp.windows[i]));
-    }
-  }
-#endif
-
   for (u64 i = 0; i < MAX_WINDOWS; ++i) {
     cleanup_window(&(comp.windows[i]));
   }
@@ -278,9 +168,8 @@ i32 run_main_loop(void) {
   return EXIT_SUCCESS;
 }
 
-#if 0
 void add_node(compositor_t *comp, node_type_t type, node_data_t data, i32 x,
-              i32 y) {
+              i32 y, ui_elem_colours_t colours) {
   if (comp->count + 1 >= MAX_NODES) {
     return;
   }
@@ -293,8 +182,8 @@ void add_node(compositor_t *comp, node_type_t type, node_data_t data, i32 x,
               .w = NODE_WIDTH,
               .h = NODE_HEIGHT,
           },
+      .colours = colours,
       .type = type,
       .data.path = data.path,
   };
 }
-#endif

src/nodes.c

@@ -1,4 +0,0 @@
-#include "nodes.h"
-#include "aliases/aliases.h"
-#include "window.h"
-#include <stdbool.h>

src/ui.c

@@ -3,25 +3,6 @@
 #include "aliases/aliases.h"
 #include "window.h"
 
-typedef struct ui_elem_colours ui_elem_colours_t;
-struct ui_elem_colours {
-  colour_t fill;
-  colour_t border;
-};
-
-INTERNAL ui_elem_colours_t colours[COUNT_UI_ELEM] = {
-    [UI_ELEM_NODE] =
-        (ui_elem_colours_t){
-            .fill = (colour_t){.abgr = 0xff2c84b7},
-            .border = (colour_t){.abgr = 0xff315c89},
-        },
-    [UI_ELEM_BUTTON] =
-        (ui_elem_colours_t){
-            .fill = (colour_t){.abgr = 0xff89a83c},
-            .border = (colour_t){.abgr = 0xff768432},
-        },
-};
-
 bool aabb(const ui_elem_t *elem, i32 x, i32 y) {
   return x > elem->rect.topleft.x && x <= elem->rect.topleft.x + elem->rect.w &&
          y > elem->rect.topleft.y && y <= elem->rect.topleft.y + elem->rect.h;
@@ -71,7 +52,8 @@ void handle_ui_events(const window_t *wnd, ui_ctx_t *ctx,
   }
 }
 
-bool button(const window_t *wnd, ui_ctx_t *ctx, rect_t rect) {
+bool button(const window_t *wnd, ui_ctx_t *ctx, rect_t rect,
+            ui_elem_colours_t colours) {
   if (ctx->count + 1 >= MAX_UI_ELEMENTS) {
     return false;
   }
@@ -82,8 +64,8 @@ bool button(const window_t *wnd, ui_ctx_t *ctx, rect_t rect) {
       .type = UI_ELEM_BUTTON,
   };
 
-  fill_rect(wnd, rect, colours[UI_ELEM_BUTTON].fill);
-  draw_rect(wnd, rect, colours[UI_ELEM_BUTTON].border);
+  fill_rect(wnd, rect, colours.fill);
+  draw_rect(wnd, rect, colours.border);
 
   if (wnd != ctx->wnd || (ctx->active >= 0 && ctx->active != elem.id)) {
     return false;
@@ -107,7 +89,8 @@ bool button(const window_t *wnd, ui_ctx_t *ctx, rect_t rect) {
   return false;
 }
 
-rect_t node(const window_t *wnd, ui_ctx_t *ctx, rect_t rect) {
+rect_t node(const window_t *wnd, ui_ctx_t *ctx, rect_t rect,
+            ui_elem_colours_t colours) {
   if (ctx->count + 1 >= MAX_UI_ELEMENTS) {
     return (rect_t){0};
   }
@@ -118,8 +101,8 @@ rect_t node(const window_t *wnd, ui_ctx_t *ctx, rect_t rect) {
       .type = UI_ELEM_NODE,
   };
 
-  fill_rect(wnd, rect, colours[UI_ELEM_NODE].fill);
-  draw_rect(wnd, rect, colours[UI_ELEM_NODE].border);
+  fill_rect(wnd, rect, colours.fill);
+  draw_rect(wnd, rect, colours.border);
 
   if (wnd != ctx->wnd || (ctx->active >= 0 && ctx->active != elem.id)) {
     return rect;