#62, #63 graphics primatives and added display boxes to renderer

coordinator/renderer.lua

@@ -1,36 +1,58 @@
-local log = require("scada-common.log")
+local log  = require("scada-common.log")
 local util = require("scada-common.util")
 
+local displaybox = require("graphics.elements.displaybox")
+local structs    = require("graphics.structs")
+
 local renderer = {}
 
+local gconf = {
+    -- root boxes
+    root = {
+        fgd = colors.black,
+        bkg = colors.lightGray
+    }
+}
+
+-- render engine
 local engine = {
     monitors = nil,
     dmesg_window = nil
 }
 
+-- UI elements
+local ui = {
+    main_box = nil,
+    unit_boxes = {}
+}
+
+-- reset a display to the "default", but set text scale to 0.5
+local function _reset_display(monitor)
+    monitor.setTextScale(0.5)
+    monitor.setTextColor(colors.white)
+    monitor.setBackgroundColor(colors.black)
+    monitor.clear()
+    monitor.setCursorPos(1, 1)
+end
+
+-- link to the monitor peripherals
 ---@param monitors monitors_struct
 function renderer.set_displays(monitors)
     engine.monitors = monitors
 end
 
+-- reset all displays in use by the renderer
 function renderer.reset()
     -- reset primary monitor
-    engine.monitors.primary.setTextScale(0.5)
-    engine.monitors.primary.setTextColor(colors.white)
-    engine.monitors.primary.setBackgroundColor(colors.black)
-    engine.monitors.primary.clear()
-    engine.monitors.primary.setCursorPos(1, 1)
+    _reset_display(engine.monitors.primary)
 
     -- reset unit displays
     for _, monitor in pairs(engine.monitors.unit_displays) do
-        monitor.setTextScale(0.5)
-        monitor.setTextColor(colors.white)
-        monitor.setBackgroundColor(colors.black)
-        monitor.clear()
-        monitor.setCursorPos(1, 1)
+        _reset_display(monitor)
     end
 end
 
+-- initialize the dmesg output window
 function renderer.init_dmesg()
     local disp_x, disp_y = engine.monitors.primary.getSize()
     engine.dmesg_window = window.create(engine.monitors.primary, 1, 1, disp_x, disp_y)
@@ -38,4 +60,22 @@ function renderer.init_dmesg()
     log.direct_dmesg(engine.dmesg_window)
 end
 
+-- start the coordinator GUI
+function renderer.start_ui()
+    local palette = structs.graphics.cpair(gconf.root.fgd, gconf.root.bkg)
+
+    ui.main_box = displaybox{window = engine.monitors.primary, fg_bg = palette}
+
+    for _, monitor in pairs(engine.monitors.unit_displays) do
+        table.insert(ui.unit_boxes, displaybox{window = engine.monitors.primary, fg_bg = palette})
+    end
+end
+
+-- close out the UI
+function renderer.close_ui()
+    -- clear root UI elements
+    ui.main_box = nil
+    ui.unit_boxes = {}
+end
+
 return renderer