Full color support, rework the directory structure

firmware/Application/ScreenManager.cpp

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2019  Max Regan
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "ScreenManager.h"
+#include "ButtonManager.h"
+
+// TODO: Basically all of the error checking
+
+using Common::Schedule::Task;
+using Common::Schedule::NextTime;
+using Common::ReturnCode;
+
+ScreenManager::ScreenManager(Common::Schedule::TaskScheduler &scheduler,
+                             BSP::DisplayDriver &display,
+                             BSP::ButtonManager &buttons)
+    : m_scheduler(scheduler)
+    , m_screen_stack{nullptr}
+    , m_screen_stack_depth(0)
+    , m_display(display)
+    , m_buttons(buttons)
+{
+}
+
+ReturnCode ScreenManager::init()
+{
+    m_buttons.set_callback(
+        BSP::ButtonManager::Button::UP,
+        [this](BSP::ButtonManager::ButtonState state) {
+            if (state == BSP::ButtonManager::ButtonState::PRESSED) {
+                current_screen()->notify_up_button();
+            }});
+
+    m_buttons.set_callback(
+        BSP::ButtonManager::Button::MID,
+        [this](BSP::ButtonManager::ButtonState state) {
+            if (state == BSP::ButtonManager::ButtonState::PRESSED) {
+                return current_screen()->notify_middle_button();
+            }});
+
+    m_buttons.set_callback(
+        BSP::ButtonManager::Button::DOWN,
+        [this](BSP::ButtonManager::ButtonState state) {
+            if (state == BSP::ButtonManager::ButtonState::PRESSED) {
+                current_screen()->notify_down_button();
+            }});
+
+    m_display.clear();
+
+    return ReturnCode::OK;
+}
+
+NextTime ScreenManager::execute()
+{
+    return current_screen()->execute();
+}
+
+ReturnCode ScreenManager::set_root_screen(Screen &screen)
+{
+    m_screen_stack[m_screen_stack_depth] = &screen;
+    m_screen_stack_depth = 1;
+    current_screen()->enable();
+    m_scheduler.add_task(*this, NextTime::asap());
+
+    return ReturnCode::OK;
+}
+
+ReturnCode ScreenManager::push_screen(Screen &screen)
+{
+    if (m_screen_stack_depth == MAX_SCREEN_STACK) {
+        return ReturnCode::FAIL;
+    }
+
+    // TODO: "Lock" changes during this operation. Don't allow
+    // disable/enable to push/pop.
+
+    current_screen()->disable();
+    m_screen_stack[m_screen_stack_depth] = &screen;
+    m_screen_stack_depth++;
+    current_screen()->enable();
+    m_scheduler.add_task(*this, NextTime::asap());
+
+    return ReturnCode::OK;
+}
+
+ReturnCode ScreenManager::pop_screen() {
+    if (m_screen_stack_depth == 1) {
+        return ReturnCode::FAIL;
+    }
+
+    current_screen()->disable();
+    m_screen_stack_depth--;
+    m_screen_stack[m_screen_stack_depth] = nullptr;
+    current_screen()->enable();
+    m_scheduler.add_task(*this, NextTime::asap());
+
+    return ReturnCode::OK;
+}
+
+ReturnCode ScreenManager::set_screen(Screen &screen) {
+    if (m_screen_stack_depth == 1) {
+        return ReturnCode::FAIL;
+    }
+
+    current_screen()->disable();
+    m_screen_stack[m_screen_stack_depth - 1] = &screen;
+    current_screen()->enable();
+    m_scheduler.add_task(*this, NextTime::asap());
+
+    return ReturnCode::OK;
+}