Adding some ammenities so that we can have better layout support

src/UIComponent.cpp

@@ -8,6 +8,9 @@
 
 #define DEBUG 1
 
+UIElement::UIElement()
+    : display(nullptr), dims(UIDimensions(0, 0, 0, 0)), decor(nullptr), title(nullptr) {}
+
 UIElement::UIElement(Arduino_GFX *d, UIDimensions dims, UIDecorations *decor,
                      char *title)
     : display(d), dims(dims), decor(decor), title(title) {}
@@ -82,7 +85,7 @@ void UIElement::replaceString(char *oldVal, char *newVal) {
   if (oldValLen > newValLen) {
     // If the old value is longer than the new value, we have to delete the
     // extra of the old value, which is whatever starts at the new value len
-    for (size_t start = newValLen; start < oldValLen; start++) {
+    for (std::size_t start = newValLen; start < oldValLen; start++) {
       this->display->setCursor(x0 + start * (CHR_WIDTH(this->decor->textSize)),
                                y0);
       this->display->setTextColor(this->decor->bgColor);
@@ -90,7 +93,7 @@ void UIElement::replaceString(char *oldVal, char *newVal) {
     }
   }
 
-  for (size_t k = 0; k < newValLen; k++) {
+  for (std::size_t k = 0; k < newValLen; k++) {
     if (k <= oldValLen) {
       if (oldVal[k] != newVal[k]) {
         this->display->setCursor(x0 + k * (CHR_WIDTH(this->decor->textSize)),
@@ -106,3 +109,39 @@ void UIElement::replaceString(char *oldVal, char *newVal) {
     this->display->print(newVal[k]);
   }
 }
+
+UIElement* UIElement::AddChild() {
+  if (childrenCount >= MAX_CHILDREN) {
+    return nullptr;
+  }
+
+  UIElement* newElem = WindowPool::Allocate();
+  if (!newElem) {
+    return newElem;
+  }
+
+  this->children[this->curChildIndex] = newElem;
+  this->childrenCount++;
+  this->curChildIndex++;
+
+  return newElem;
+}
+
+std::uint8_t UIElement::ChildrenCount() {
+  return this->childrenCount;
+}
+
+namespace WindowPool {
+  UIElement pool[MAX_WINDOWS];
+  uint16_t poolIndex = 0;
+
+  UIElement* Allocate() {
+    if (poolIndex >= MAX_WINDOWS) {
+      return nullptr;
+    }
+
+    return &pool[poolIndex];
+    poolIndex++;
+  }
+}
+

src/UIComponent.h

@@ -3,21 +3,24 @@
 
 #include "Arduino_GFX.h"
 #include "UIDecorations.h"
+#include "UIDimensions.h"
+#include <cstdint>
 #include <stdint.h>
 
+#define MAX_WINDOWS 512
+#define MAX_CHILDREN 32
+
 enum ComponentType {
   STRING,
   TABLE,
 };
 
-struct UIDimensions {
-  uint16_t x = 0, y = 0;
-  uint16_t width = 0, height = 0;
+class UIElement {
+private:
+  uint8_t childrenCount = 0;
+  int8_t curChildIndex = -1; // Start at -1, have no children
 
-  UIDimensions(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
-};
-
-struct UIElement {
+public:
   Arduino_GFX *display;
   UIDimensions dims;
   UIDecorations *decor;
@@ -26,9 +29,17 @@ struct UIElement {
   uint16_t refreshRate = 0;
   ComponentType type;
 
+  UIElement();
   UIElement(Arduino_GFX *d, UIDimensions dims, UIDecorations *decor,
             char *Title);
 
+  // Children
+  UIElement* children[MAX_CHILDREN];
+
+  // Children Handling
+  UIElement* AddChild();
+  uint8_t ChildrenCount();
+
   // Getters
   int16_t getContentAreaX0();
   int16_t getContentAreaY0();
@@ -52,4 +63,11 @@ struct UIElement {
   void replaceString(char *oldVal, char *newVal);
 };
 
+namespace WindowPool {
+  extern UIElement pool[MAX_WINDOWS];
+  extern uint16_t poolIndex;
+
+  UIElement* Allocate();
+};
+
 #endif

src/UIDecorations.cpp

@@ -1,5 +1,8 @@
 #include "UIDecorations.h"
 
+namespace Curses {
+};
+
 UIDecorations::UIDecorations() {}
 UIDecorations::UIDecorations(uint16_t bg, uint16_t fg, uint16_t title,
                              uint16_t border, uint8_t titleSize,

src/UIDimensions.h

@@ -0,0 +1,13 @@
+#ifndef __UI_DIMENSIONS__
+#define __UI_DIMENSIONS__
+
+#include <stdint.h>
+
+struct UIDimensions {
+  uint16_t x = 0, y = 0;
+  uint16_t width = 0, height = 0;
+
+  UIDimensions(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
+};
+
+#endif

src/UIDrawing.cpp

@@ -50,6 +50,7 @@ void UIElement::placeLeft(UIElement *ref) {
 }
 
 void UIElement::drawBox() {
+  Serial2.println("Drawing box!");
   // This is the border rectangle
   if (this->decor->hasBorder) {
     for (int k = 0; k < DEFAULT_BORDER_THICKNESS; k++) {
@@ -59,15 +60,18 @@ void UIElement::drawBox() {
     }
   }
 
+  Serial2.println("Debug1");
   // For debugging purpouses
   // title area
   int16_t x = 0, y = 0;
   uint16_t w = 0, h = 0;
 
+  Serial2.println("Debug2");
   // U8G2 u8g2;  // No display pin setup needed since we're only using font data
   // u8g2.setFont(u8g2_font_9x18_tf);
   // int ascent = u8g2.getAscent();
 
+  Serial2.println("Debug3");
   h = this->getTitleAreaHeight();
   uint16_t titleAreaWidth = this->getTitleAreaWidth();
   int16_t titleTopLeftX = this->getTitleAreaX0();
@@ -77,6 +81,7 @@ void UIElement::drawBox() {
                           h, GREEN);
 #endif
 
+  Serial2.println("Debug4");
   // content area
   x = this->getContentAreaX0();
   y = this->getContentAreaY0();
@@ -88,17 +93,21 @@ void UIElement::drawBox() {
   this->display->drawRect(x, y, w, h, BLUE);
 #endif
 
+  Serial2.println("Debug5");
   if (this->decor->hasBorder) {
     // Remove the border line behind the title
     this->display->fillRect(titleTopLeftX - DEFAULT_MARGIN, this->dims.y,
                             titleAreaWidth + DEFAULT_MARGIN,
                             DEFAULT_BORDER_THICKNESS, MAIN_BG_COLOR);
 
+    Serial2.println("Debug6");
     // Render the title
     this->display->setCursor(titleTopLeftX, this->dims.y);
     this->display->print(this->title);
   }
 
+  Serial2.println("Debug7");
+
 #ifdef DEBUG
   // Element bounds
   this->display->drawRect(this->dims.x, this->dims.y, this->dims.width,

src/UIScreen.cpp

@@ -0,0 +1,6 @@
+#include "UIScreen.h"
+#include "UIDecorations.h"
+#include "UIDimensions.h"
+
+Curses::Screen::Screen(Arduino_GFX *d, UIDimensions dims, UIDecorations decor) 
+  : display(d), dims(dims), decor(decor) {};

src/UIScreen.h

@@ -0,0 +1,20 @@
+#ifndef __UI_SCREEN__
+#define __UI_SCREEN__
+
+#include "UIComponent.h"
+#include "UIDecorations.h"
+#include "UIDimensions.h"
+
+namespace Curses {
+// Entrypoint for our UI. We will have a single screen and this screen can
+// have some windows and whatnot
+class Screen {
+public:
+  UIDimensions dims;
+  UIDecorations decor;
+  Arduino_GFX *display;
+  Screen(Arduino_GFX *d, UIDimensions dims, UIDecorations decor);
+};
+}; // namespace Curses
+
+#endif