Various changes

- Add "Pikachu Bed" and "Tentacool Doll" decoration unlock options for
  gen 2
- bugfix for unsafe behaviour
- attempt to make the RESET button work for cartridge switching. It
  failed though. (not reliable). Therefore I just added a warning
  message instead.
- Work on new ScrollWidget for Credits/About screen (Work In Progress)

include/core/Application.h

@@ -16,6 +16,8 @@ public:
     void init();
 
     void run();
+
+    void onResetInterrupt();
 protected:
 private:
     RDPQGraphics graphics_;

include/core/common.h

@@ -1,6 +1,21 @@
 #ifndef _CORE_COMMON_H
 #define _CORE_COMMON_H
 
+typedef struct Point
+{
+    int x;
+    int y;
+} Point;
+
+typedef struct FloatPoint
+{
+    float x;
+    float y;
+} FloatPoint;
+
+typedef Point Vector;
+typedef FloatPoint FloatVector;
+
 typedef struct Dimensions
 {
     int width;
@@ -27,6 +42,10 @@ bool isZeroSizeRectangle(const Rectangle& rect);
  */
 Rectangle addOffset(const Rectangle& a, const Rectangle& b);
 
+bool isPointInsideRectangle(const Rectangle& a, const Point& p);
+
+bool doRectanglesOverlap(const Rectangle& a, const Rectangle& b);
+
 /**
  * @brief Extract a Dimensions struct from a Rectangle that only contains the width and height
  */

include/menu/MenuFunctions.h

@@ -3,12 +3,17 @@
 
 #include "Moves.h"
 
+#include <cstdint>
+
 // these are used to pass as a pointer to the gen1PrepareToTeachPikachu
 extern const Move MOVE_SURF;
 extern const Move MOVE_FLY;
 
-void printMessage(void* context, const void* param);
+extern const uint16_t GEN2_EVENTFLAG_DECORATION_PIKACHU_BED;
+extern const uint16_t GEN2_EVENTFLAG_DECORATION_TENTACOOL_DOLL;
+
 void activateFrameLog(void* context, const void* param);
+void advanceDialog(void* context, const void* param);
 
 void goToTestScene(void* context, const void* param);
 
@@ -19,5 +24,7 @@ void goToGen2PCNYDistributionPokemonMenu(void* context, const void* param);
 void gen1PrepareToTeachPikachu(void* context, const void* param);
 void gen1TeachPikachu(void* context, const void* param);
 void gen2ReceiveGSBall(void* context, const void* param);
+void gen2SetEventFlag(void* context, const void* param);
+
 
 #endif

include/scenes/AbstractUIScene.h

@@ -49,6 +49,8 @@ typedef struct WidgetFocusChainSegment
 class AbstractUIScene : public IScene
 {
 public:
+    static const uint16_t MINIMUM_TIME_BETWEEN_INPUT_EVENTS;
+
     AbstractUIScene(SceneDependencies& deps);
     virtual ~AbstractUIScene();
 

include/scenes/MenuScene.h

@@ -13,6 +13,7 @@ typedef struct MenuSceneContext
 {
     MenuItemData* menuEntries;
     uint32_t numMenuEntries;
+    bool bButtonMeansUserWantsToSwitchCartridge;
 } MenuSceneContext;
 
 /**
@@ -38,7 +39,7 @@ public:
 
     SceneDependencies& getDependencies();
 
-    virtual void showDialog(DialogData* diagData);
+    void showDialog(DialogData* diagData) override;
 protected:
     virtual void setupMenu();
     void setupDialog(DialogWidgetStyle& style) override;

include/scenes/SceneManager.h

@@ -41,7 +41,7 @@ public:
      * WARNING: If you specify a sceneContext, you MUST also specify a deleteContextFunc callback function pointer.
      * This is needed because you can't call delete() on a void*. And we need to keep the context around in the sceneHistory for as long as it needs to
      */
-    void switchScene(SceneType sceneType, void (*deleteContextFunc)(void*) = nullptr, void* sceneContext = nullptr);
+    void switchScene(SceneType sceneType, void (*deleteContextFunc)(void*) = nullptr, void* sceneContext = nullptr, bool deleteHistory = false);
     
     /**
      * @brief Switch back to the previous scene in the history stack

include/scenes/SceneWithDialogWidget.h

@@ -16,6 +16,7 @@ public:
     void render(RDPQGraphics& gfx, const Rectangle& sceneBounds) override;
 
     void advanceDialog();
+    virtual void showDialog(DialogData* diagData);
 protected:
     virtual void setupFonts();
     virtual void setupDialog(DialogWidgetStyle& style);

include/transferpak/TransferPakManager.h

@@ -42,6 +42,7 @@ public:
     void setPort(joypad_port_t port);
 
     bool hasTransferPak();
+    bool isPoweredOn() const;
     bool setPower(bool on);
     uint8_t getStatus();
 
@@ -92,7 +93,7 @@ public:
 protected:
 private:
     joypad_port_t port_;
-    bool wasPoweredAtLeastOnce_;
+    bool isPoweredOn_;
     uint8_t currentSRAMBank_;
     uint16_t readBufferBankOffset_;
     uint16_t writeBufferSRAMBankOffset_;

include/widget/DialogWidget.h

@@ -3,8 +3,7 @@
 
 #include "widget/VerticalList.h"
 #include "widget/MenuItemWidget.h"
-#include "core/Sprite.h"
-#include "core/RDPQGraphics.h"
+#include "widget/ListItemFiller.h"
 
 #define DIALOG_TEXT_SIZE 512
 
@@ -117,6 +116,7 @@ private:
     bool isAdvanceAllowed() const;
 
     VerticalList dialogOptionList_;
+    ListItemFiller<VerticalList, MenuItemData, MenuItemWidget, MenuItemStyle> dialogOptionListFiller_;
     AnimationManager& animationManager_;
     Rectangle bounds_;
     DialogWidgetStyle style_;

include/widget/ListItemFiller.h

@@ -26,11 +26,7 @@ public:
 
     ~ListItemFiller()
     {
-        for(ListItemWidgetType* item : widgets_)
-        {
-            delete item;
-        }
-        widgets_.clear();
+        deleteWidgets();
     }
 
     void addItems(ListDataType* dataList, size_t dataListSize, const MenuItemStyle& itemStyle)
@@ -44,6 +40,15 @@ public:
             list_.addWidget(itemWidget);
         }
     }
+
+    void deleteWidgets()
+    {
+        for(ListItemWidgetType* item : widgets_)
+        {
+            delete item;
+        }
+        widgets_.clear();
+    }
 protected:
 private:
     ListType& list_;

include/widget/MenuItemWidget.h

@@ -115,7 +115,7 @@ protected:
     /**
      * Executes the onConfirmAction callback (if any)
      */
-    void execute();
+    bool execute();
 private:
     MenuItemData data_;
     MenuItemStyle style_;

include/widget/ScrollWidget.h

@@ -0,0 +1,115 @@
+#ifndef _SCROLLWIDGET_H
+#define _SCROLLWIDGET_H
+
+#include "widget/IWidget.h"
+#include "animations/IAnimation.h"
+#include <vector>
+
+typedef std::vector<IWidget*> WidgetList;
+
+class ScrollWidget;
+class AnimationManager;
+
+typedef struct ScrollWidgetStyle
+{
+    // it defines the amount of pixels we should scroll when the analog stick or dpad is used.
+    uint8_t scrollStep;
+} ScrollWidgetStyle;
+
+/**
+ * @brief This Animation implementation is used internal in ScrollWidget
+ * to move the "view window"'s x and y-coordinates.
+ * 
+ * It's specific to the ScrollWidget
+ */
+class MoveScrollWidgetWindowAnimation : public AbstractAnimation
+{
+public:
+    MoveScrollWidgetWindowAnimation(ScrollWidget* list);
+    virtual ~MoveScrollWidgetWindowAnimation();
+
+    AnimationDistanceTimeFunctionType getDistanceTimeFunctionType() const override;
+
+    uint32_t getDurationInMs() const override;
+
+    void start(const Point& startPoint, const Point& endPoint);
+protected:
+    void apply(float pos) override;
+private:
+    ScrollWidget* list_;
+    Point windowStartPoint_;
+    Point windowEndPoint_;
+};
+
+/**
+ * @brief This is a widget that contains other widgets and can scroll through it.
+ * It differs from VerticalList in that ScrollWidget manages "unstructured" widgets instead of just a list in a certain direction.
+ * 
+ * But this scroll widget does not allow you to select a widget and/or handle events on it. Every widget added will remain unfocused and won't handle keys
+ * display only.
+ * 
+ */
+class ScrollWidget : public IWidget
+{
+public:
+    ScrollWidget(AnimationManager& animManager);
+    virtual ~ScrollWidget();
+
+    bool isFocused() const override;
+    void setFocused(bool isFocused) override;
+
+    bool isVisible() const override;
+    void setVisible(bool visible) override;
+
+    Rectangle getBounds() const override;
+    void setBounds(const Rectangle& bounds) override;
+    Dimensions getSize() const override;
+
+    void setStyle(const ScrollWidgetStyle& style);
+
+    void addWidget(IWidget* widget);
+    void removeWidget(IWidget* widget);
+
+    bool handleUserInput(const joypad_inputs_t& userInput) override;
+    void render(RDPQGraphics& gfx, const Rectangle& parentBounds) override;
+
+    /**
+     * @brief Sets the view window start xy coords.
+     * This is used by MoveScrollWidgetWindowAnimation
+     */
+    void setWindowStart(const Point& windowStart);
+
+    /**
+     * @brief Indicates the percentage at which the current window position is at horizontally
+     *  in relation to the entire window
+     */
+    float getWindowProgressX() const;
+    /**
+     * @brief Indicates the percentage at which the current window position is at vertically
+     *  in relation to the entire window
+     */
+    float getWindowProgressY() const;
+protected:
+private:
+    /**
+     * @brief This function will grow the maximum dimensions of the window
+     * based on the specified IWidget
+     */
+    void growWindow(IWidget* widget);
+    /**
+     * @brief Recalculates the entire width and height of the view window
+     * This is necessary when removing a widget
+     */
+    void recalculateWindowSize();
+
+    MoveScrollWidgetWindowAnimation windowAnimation_;
+    WidgetList widgets_;
+    ScrollWidgetStyle style_;
+    AnimationManager& animManager_;
+    Rectangle bounds_;
+    Rectangle windowBounds_;
+    bool visible_;
+    bool focused_;
+};
+
+#endif

src/core/Application.cpp

@@ -1,6 +1,16 @@
 #include "core/Application.h"
 #include "scenes/IScene.h"
 
+static Application* appInstance = nullptr;
+static void resetInterruptHandler()
+{
+    if(!appInstance)
+    {
+        return;
+    }
+    appInstance->onResetInterrupt();
+}
+
 Application::Application()
     : graphics_()
     , animationManager_()
@@ -9,15 +19,21 @@ Application::Application()
     , sceneManager_(graphics_, animationManager_, fontManager_, tpakManager_)
     , sceneBounds_({0})
 {
+    appInstance = this;
 }
 
 Application::~Application()
 {
+    tpakManager_.setPower(false);
+    unregister_RESET_handler(resetInterruptHandler);
+
     graphics_.destroy();
 
     display_close();
     timer_close();
     joypad_close();
+
+    appInstance = nullptr;
 }
 
 void Application::init()
@@ -37,6 +53,8 @@ void Application::init()
     //display_init(RESOLUTION_320x240, DEPTH_16_BPP, 3, GAMMA_NONE, ANTIALIAS_RESAMPLE_FETCH_ALWAYS);
 
     sceneManager_.switchScene(SceneType::INIT_TRANSFERPAK);
+
+    register_RESET_handler(resetInterruptHandler);
 }
 
 void Application::run()
@@ -57,3 +75,8 @@ void Application::run()
         graphics_.finishAndShowFrame();
     }
 }
+
+void Application::onResetInterrupt()
+{
+    tpakManager_.setPower(false);
+}

src/core/common.cpp

@@ -10,6 +10,26 @@ Rectangle addOffset(const Rectangle &a, const Rectangle &b)
     return Rectangle{.x = a.x + b.x, .y = a.y + b.y, .width = a.width, .height = a.height};
 }
 
+bool isPointInsideRectangle(const Rectangle& a, const Point& p)
+{
+    const bool isInsideHorizontally = (p.x >= a.x) && (p.x < (a.x + a.width));
+    const bool isInsideVertically = (p.y >= a.y) && (p.y < (a.y + a.width));
+    return (isInsideHorizontally && isInsideVertically);
+}
+
+bool doRectanglesOverlap(const Rectangle& a, const Rectangle& b)
+{
+    if (a.x < (b.x + b.width) && (a.x + a.width) > b.x &&
+        a.y + a.height > b.y && a.y < (b.y + b.height) )
+    {
+        return true;
+    }
+    else
+    {
+        return false;
+    }
+}
+
 Dimensions getDimensions(const Rectangle &r)
 {
     return Dimensions{.width = r.width, .height = r.height};

src/menu/MenuEntries.cpp

@@ -28,6 +28,16 @@ MenuItemData gen2MenuEntries[] = {
     {
         .title = "PCNY Pokémon",
         .onConfirmAction = goToGen2PCNYDistributionPokemonMenu,
+    },
+    {
+        .title = "Unlock Pikachu Bed",
+        .onConfirmAction = gen2SetEventFlag,
+        .itemParam = &GEN2_EVENTFLAG_DECORATION_PIKACHU_BED
+    },
+    {
+        .title = "Unlock Tentacool Doll",
+        .onConfirmAction = gen2SetEventFlag,
+        .itemParam = &GEN2_EVENTFLAG_DECORATION_TENTACOOL_DOLL
     }
 };
 
@@ -45,6 +55,16 @@ MenuItemData gen2CrystalMenuEntries[] = {
     {
         .title = "Unlock GS Ball",
         .onConfirmAction = gen2ReceiveGSBall
+    },
+    {
+        .title = "Unlock Pikachu Bed",
+        .onConfirmAction = gen2SetEventFlag,
+        .itemParam = &GEN2_EVENTFLAG_DECORATION_PIKACHU_BED
+    },
+    {
+        .title = "Unlock Tentacool Doll",
+        .onConfirmAction = gen2SetEventFlag,
+        .itemParam = &GEN2_EVENTFLAG_DECORATION_TENTACOOL_DOLL
     }
 };
 

src/menu/MenuFunctions.cpp

@@ -13,6 +13,10 @@
 const Move MOVE_SURF = Move::SURF;
 const Move MOVE_FLY = Move::FLY;
 
+// based on https://github.com/kwsch/PKHeX/blob/master/PKHeX.Core/Resources/text/script/gen2/flags_c_en.txt
+const uint16_t GEN2_EVENTFLAG_DECORATION_PIKACHU_BED = 679;
+const uint16_t GEN2_EVENTFLAG_DECORATION_TENTACOOL_DOLL = 715;
+
 typedef struct Gen1TeachPikachuParams
 {
     Move moveType;
@@ -71,9 +75,17 @@ static uint8_t gen1FindPikachuInParty(Gen1Party& party)
     return foundIndex;
 }
 
-void printMessage(void* context, const void*)
+static const char* convertGen2EventFlagToString(uint16_t eventFlagIndex)
 {
-    debugf((const char*)context);
+    switch(eventFlagIndex)
+    {
+    case GEN2_EVENTFLAG_DECORATION_PIKACHU_BED:
+        return "Pikachu Bed";
+    case GEN2_EVENTFLAG_DECORATION_TENTACOOL_DOLL:
+        return "Tentacool doll";
+    default:
+        return "UNKNOWN";
+    }
 }
 
 void activateFrameLog(void* context, const void*)
@@ -84,6 +96,12 @@ void activateFrameLog(void* context, const void*)
     gfx.triggerDebugFrame();
 }
 
+void advanceDialog(void* context, const void*)
+{
+    MenuScene* scene = static_cast<MenuScene*>(context);
+    scene->advanceDialog();
+}
+
 void goToTestScene(void* context, const void* param)
 {
     MenuScene* scene = static_cast<MenuScene*>(context);
@@ -330,5 +348,37 @@ void gen2ReceiveGSBall(void* context, const void* param)
     
     setDialogDataText(*messageData, "GS Ball event unlocked! Please go to the Golden Rod Pokémon Center and try to leave!", trainerName);
 
+    scene->showDialog(messageData);
+}
+
+void gen2SetEventFlag(void* context, const void* param)
+{
+    MenuScene* scene = static_cast<MenuScene*>(context);
+    TransferPakManager& tpakManager = scene->getDependencies().tpakManager;
+    TransferPakRomReader romReader(tpakManager);
+    TransferPakSaveManager saveManager(tpakManager);
+    Gen2GameReader gameReader(romReader, saveManager, static_cast<Gen2GameType>(scene->getDependencies().specificGenVersion));
+    DialogData* messageData = new DialogData{
+        .shouldDeleteWhenDone = true
+    };
+    const uint16_t eventFlagIndex = *static_cast<const uint16_t*>(param);
+
+    tpakManager.setRAMEnabled(true);
+
+    const char* trainerName = gameReader.getTrainerName();
+    if(gameReader.getEventFlag(eventFlagIndex))
+    {
+        setDialogDataText(*messageData, "%s already has %s!", trainerName, convertGen2EventFlagToString(eventFlagIndex));
+    }
+    else
+    {
+        gameReader.setEventFlag(eventFlagIndex, true);
+        gameReader.finishSave();
+        tpakManager.finishWrites();
+
+        setDialogDataText(*messageData, "%s has unlocked %s!", trainerName, convertGen2EventFlagToString(eventFlagIndex));
+    }
+
+    tpakManager.setRAMEnabled(false);
     scene->showDialog(messageData);
 }

src/scenes/AbstractUIScene.cpp

@@ -2,7 +2,7 @@
 #include "core/DragonUtils.h"
 #include "widget/IWidget.h"
 
-static uint16_t minimumTimeBetweenInputEventsInMs = 150;
+const uint16_t AbstractUIScene::MINIMUM_TIME_BETWEEN_INPUT_EVENTS = 150;
 
 AbstractUIScene::AbstractUIScene(SceneDependencies& deps)
     : deps_(deps)
@@ -23,7 +23,7 @@ void AbstractUIScene::processUserInput()
     }
 
     const uint64_t now = get_ticks();
-    if(TICKS_TO_MS(now - lastInputHandleTime_) < minimumTimeBetweenInputEventsInMs)
+    if(TICKS_TO_MS(now - lastInputHandleTime_) < MINIMUM_TIME_BETWEEN_INPUT_EVENTS)
     {
         // not enough time has passed since last handled input event. Ignore
         return;

src/scenes/InitTransferPakScene.cpp

@@ -77,7 +77,8 @@ void InitTransferPakScene::onDialogDone()
     {
         menuContext = new MenuSceneContext({
             .menuEntries = gen1MenuEntries,
-            .numMenuEntries = static_cast<uint32_t>(gen1MenuEntriesSize / sizeof(gen1MenuEntries[0]))
+            .numMenuEntries = static_cast<uint32_t>(gen1MenuEntriesSize / sizeof(gen1MenuEntries[0])),
+            .bButtonMeansUserWantsToSwitchCartridge = true
         });
     }
     else if(gen2Type != Gen2GameType::INVALID)
@@ -86,14 +87,16 @@ void InitTransferPakScene::onDialogDone()
         {
             menuContext = new MenuSceneContext({
                 .menuEntries = gen2CrystalMenuEntries,
-                .numMenuEntries = static_cast<uint32_t>(gen2CrystalMenuEntriesSize / sizeof(gen2CrystalMenuEntries[0]))
+                .numMenuEntries = static_cast<uint32_t>(gen2CrystalMenuEntriesSize / sizeof(gen2CrystalMenuEntries[0])),
+                .bButtonMeansUserWantsToSwitchCartridge = true
             });
         }
         else
         {
             menuContext = new MenuSceneContext({
                 .menuEntries = gen2MenuEntries,
-                .numMenuEntries = static_cast<uint32_t>(gen2MenuEntriesSize / sizeof(gen2MenuEntries[0]))
+                .numMenuEntries = static_cast<uint32_t>(gen2MenuEntriesSize / sizeof(gen2MenuEntries[0])),
+                .bButtonMeansUserWantsToSwitchCartridge = true
             });
         }
     }

src/scenes/MenuScene.cpp

@@ -1,6 +1,8 @@
 #include "scenes/MenuScene.h"
 #include "core/FontManager.h"
 #include "scenes/SceneManager.h"
+#include "transferpak/TransferPakManager.h"
+#include "menu/MenuFunctions.h"
 
 #include <cstdio>
 
@@ -78,7 +80,7 @@ void MenuScene::render(RDPQGraphics& gfx, const Rectangle& sceneBounds)
         .fontId = arialId_,
         .fontStyleId = fontStyleWhiteId_
     };
-    gfx.drawText(Rectangle{40, 10, 280, 16}, "PokeMe64 by risingPhil. Very early version...", renderSettings);
+    gfx.drawText(Rectangle{40, 10, 280, 16}, "PokeMe64 by risingPhil. Version 0.1", renderSettings);
 }
 
 bool MenuScene::handleUserInput(joypad_port_t port, const joypad_inputs_t& inputs)
@@ -98,7 +100,22 @@ bool MenuScene::handleUserInput(joypad_port_t port, const joypad_inputs_t& input
     {
         // b button release occurred. Switch back to previous scene.
         bButtonPressed_ = false;
-        deps_.sceneManager.goBackToPreviousScene();
+
+        if(context_->bButtonMeansUserWantsToSwitchCartridge)
+        {
+            DialogData* diag = new DialogData{
+                .shouldDeleteWhenDone = true
+            };
+
+            setDialogDataText(*diag, "Please turn the console off to switch gameboy cartridges!");
+
+            showDialog(diag);
+        }
+        else
+        {
+            // now do the actual switch back to the previous scene
+            deps_.sceneManager.goBackToPreviousScene();
+        }
         return true;
     }
     return false;
@@ -199,10 +216,9 @@ void MenuScene::setupDialog(DialogWidgetStyle& style)
 
 void MenuScene::showDialog(DialogData* diagData)
 {
+    SceneWithDialogWidget::showDialog(diagData);
     menuList_.setVisible(false);
     cursorWidget_.setVisible(false);
-    dialogWidget_.setVisible(true);
-    dialogWidget_.setData(diagData);
     setFocusChain(&dialogFocusChainSegment_);
 }
 

src/scenes/SceneManager.cpp

@@ -29,11 +29,16 @@ SceneManager::~SceneManager()
     unloadScene(scene_);
 }
 
-void SceneManager::switchScene(SceneType type, void (*deleteContextFunc)(void*), void* sceneContext)
+void SceneManager::switchScene(SceneType type, void (*deleteContextFunc)(void*), void* sceneContext, bool deleteHistory)
 {
     newSceneType_ = type;
     newSceneContext_ = sceneContext;
 
+    if(deleteHistory)
+    {
+        clearHistory();
+    }
+
     sceneHistory_.push_back(SceneHistorySegment{
         .type = type,
         .context = sceneContext,

src/scenes/SceneWithDialogWidget.cpp

@@ -73,6 +73,12 @@ void SceneWithDialogWidget::advanceDialog()
     dialogWidget_.advanceDialog();
 }
 
+void SceneWithDialogWidget::showDialog(DialogData* diagData)
+{
+    dialogWidget_.setVisible(true);
+    dialogWidget_.setData(diagData);
+}
+
 void SceneWithDialogWidget::setupFonts()
 {
     arialId_ = deps_.fontManager.getFont("rom://Arial.font64");

src/transferpak/TransferPakManager.cpp

@@ -10,7 +10,7 @@ static const uint16_t sramBankStartGBAddress = 0xA000;
 
 TransferPakManager::TransferPakManager()
     : port_(JOYPAD_PORT_1)
-    , wasPoweredAtLeastOnce_(false)
+    , isPoweredOn_(false)
     , currentSRAMBank_(0)
     , readBufferBankOffset_(0xFFFF)
     , writeBufferSRAMBankOffset_(0xFFFF)
@@ -30,8 +30,11 @@ joypad_port_t TransferPakManager::getPort() const
 
 void TransferPakManager::setPort(joypad_port_t port)
 {
+    if(isPoweredOn_)
+    {
+        setPower(false);
+    }
     port_ = port;
-    wasPoweredAtLeastOnce_ = false;
 }
 
 bool TransferPakManager::hasTransferPak()
@@ -47,31 +50,48 @@ bool TransferPakManager::hasTransferPak()
     return (type == JOYPAD_ACCESSORY_TYPE_TRANSFER_PAK);
 }
 
+bool TransferPakManager::isPoweredOn() const
+{
+    return isPoweredOn_;
+}
+
 bool TransferPakManager::setPower(bool on)
 {
+    uint8_t status;
     int ret;
 
-    if(!wasPoweredAtLeastOnce_)
+    if(on)
     {
-        if(!on)
-        {
-            return true;
-        }
         ret = tpak_init(static_cast<int>(port_));
         if(ret)
         {
             debugf("[TransferPakManager]: %s: tpak_init got error %d\r\n", __FUNCTION__, ret);
         }
-        wasPoweredAtLeastOnce_ = true;
+
+        status = getStatus();
+        while(!(status | TPAK_STATUS_READY))
+        {
+            debugf("[TransferPakManager]: %s: ERROR: transfer pak not ready yet. Current status is %hu\r\n", __FUNCTION__, status);
+            status = getStatus();
+        }
+        isPoweredOn_ = true;
     }
     else
     {
-        ret = tpak_set_power(port_, on);
+        ret = tpak_set_access(port_, false);
         if(ret)
         {
-            debugf("[TransferPakManager]: %s: tpak_set_power got error %d\r\n", __FUNCTION__, ret);
+            debugf("[TransferPakManager]: %s: tpak_set_access got error %d\r\n", __FUNCTION__, ret);
         }
+
+        ret = tpak_set_power(port_, false);
+        if(ret)
+        {
+            debugf("[TransferPakManager]: %s: tpak_set_access got error %d\r\n", __FUNCTION__, ret);
+        }
+        isPoweredOn_ = false;
     }
+
     return (!ret);
 }
 

src/widget/DialogWidget.cpp

@@ -1,5 +1,4 @@
 #include "widget/DialogWidget.h"
-#include "widget/ListItemFiller.h"
 #include "core/RDPQGraphics.h"
 
 #include <cstdarg>
@@ -33,6 +32,7 @@ static void releaseEntry(DialogData* data, bool releaseAllEntries)
 
 DialogWidget::DialogWidget(AnimationManager& animationManager)
     : dialogOptionList_(animationManager)
+    , dialogOptionListFiller_(dialogOptionList_)
     , animationManager_(animationManager)
     , bounds_({0})
     , style_({0})
@@ -76,6 +76,8 @@ void DialogWidget::setStyle(const DialogWidgetStyle& style)
 void DialogWidget::setData(DialogData* data)
 {
     dialogOptionList_.clearWidgets();
+    // the filler is the owner of the widgets. They need to be properly destroyed
+    dialogOptionListFiller_.deleteWidgets();
     dialogOptionList_.setVisible(false);
     dialogOptionList_.setFocused(false);
     releaseEntry(data_, true);
@@ -84,9 +86,7 @@ void DialogWidget::setData(DialogData* data)
 
     if(data_ && data->options.items)
     {
-        ListItemFiller<VerticalList, MenuItemData, MenuItemWidget, MenuItemStyle> filler(dialogOptionList_);
-
-        filler.addItems(data->options.items, data->options.number, style_.dialogOptions.style);
+        dialogOptionListFiller_.addItems(data->options.items, data->options.number, style_.dialogOptions.style);
         dialogOptionList_.setVisible(true);
         dialogOptionList_.setFocused(focused_);
     }
@@ -171,13 +171,13 @@ void DialogWidget::advanceDialog()
     releaseEntry(oldEntry, false);
 
     dialogOptionList_.clearWidgets();
+    // the filler is the owner of the widgets. They need to be properly destroyed
+    dialogOptionListFiller_.deleteWidgets();
     dialogOptionList_.setFocused(false);
     dialogOptionList_.setVisible(false);
     if(data_->options.items)
     {
-        ListItemFiller<VerticalList, MenuItemData, MenuItemWidget, MenuItemStyle> filler(dialogOptionList_);
-
-        filler.addItems(data_->options.items, data_->options.number, style_.dialogOptions.style);
+        dialogOptionListFiller_.addItems(data_->options.items, data_->options.number, style_.dialogOptions.style);
         dialogOptionList_.setVisible(true);
         dialogOptionList_.setFocused(focused_);
     }

src/widget/MenuItemWidget.cpp

@@ -3,7 +3,7 @@
 
 MenuItemWidget::MenuItemWidget()
     : data_()
-    , style_()
+    , style_({0})
     , focused_(false)
     , visible_(true)
     , aButtonPressed_(false)
@@ -70,9 +70,8 @@ bool MenuItemWidget::handleUserInput(const joypad_inputs_t& userInput)
     }
     else if(aButtonPressed_)
     {
-        execute();
         aButtonPressed_ = false;
-        return true;
+        return execute();
     }
     return false;
 }
@@ -104,7 +103,12 @@ void MenuItemWidget::render(RDPQGraphics& gfx, const Rectangle& parentBounds)
     gfx.drawText(myBounds, data_.title, (focused_) ? style_.titleFocused : style_.titleNotFocused);
 }
 
-void MenuItemWidget::execute()
+bool MenuItemWidget::execute()
 {
-    data_.onConfirmAction(data_.context, data_.itemParam);
+    if(data_.onConfirmAction)
+    {
+        data_.onConfirmAction(data_.context, data_.itemParam);
+        return true;
+    }
+    return false;
 }

src/widget/ScrollWidget.cpp

@@ -0,0 +1,310 @@
+#include "widget/ScrollWidget.h"
+#include "core/common.h"
+#include "scenes/AbstractUIScene.h"
+#include "animations/AnimationManager.h"
+#include "core/RDPQGraphics.h"
+
+#include <algorithm>
+
+static uint8_t ANALOG_STICK_MIN_THRESHOLD = 30;
+static uint8_t ANALOG_STICK_MAX_THRESHOLD = 60;
+
+static FloatVector determineScrollDirection(const joypad_inputs_t& userInput)
+{
+    // this value should end up giving a semi-normalized vector when used for both x and y coords
+    const float DPAD_2_DIRECTIONS_PRESSED_COORD = 0.7071f;
+    const float STICK_RANGE_UNIT = 1.f / (ANALOG_STICK_MAX_THRESHOLD - ANALOG_STICK_MIN_THRESHOLD);
+
+    if(userInput.btn.d_left)
+    {
+        if(userInput.btn.d_up)
+        {
+            return FloatPoint{ -DPAD_2_DIRECTIONS_PRESSED_COORD, -DPAD_2_DIRECTIONS_PRESSED_COORD};
+        }
+        else if(userInput.btn.d_down)
+        {
+            return FloatPoint{ -DPAD_2_DIRECTIONS_PRESSED_COORD, DPAD_2_DIRECTIONS_PRESSED_COORD};
+        }
+        else
+        {
+            return FloatPoint{-1.f, 0.f};
+        }
+    }
+    else if(userInput.btn.d_right)
+    {
+         if(userInput.btn.d_up)
+        {
+            return FloatPoint{ DPAD_2_DIRECTIONS_PRESSED_COORD, -DPAD_2_DIRECTIONS_PRESSED_COORD};
+        }
+        else if(userInput.btn.d_down)
+        {
+            return FloatPoint{ DPAD_2_DIRECTIONS_PRESSED_COORD, DPAD_2_DIRECTIONS_PRESSED_COORD};
+        }
+        else
+        {
+            return FloatPoint{1.f, 0.f};
+        }       
+    }
+    else if(userInput.btn.d_up)
+    {
+        return FloatPoint{0.f, -1.f};
+    }
+    else if(userInput.btn.d_down)
+    {
+        return FloatPoint{0.f, 1.f};
+    }
+    else
+    {
+        // analog stick
+        int8_t absXVal = static_cast<int8_t>(abs(userInput.stick_x));
+        int8_t absYVal = static_cast<int8_t>(abs(userInput.stick_y));
+        if(absXVal < ANALOG_STICK_MIN_THRESHOLD && absYVal < ANALOG_STICK_MIN_THRESHOLD)
+        {
+            return FloatPoint{0.f, 0.f};
+        }
+
+        // clamp the x and y values to ANALOG_STICK_MAX_THRESHOLD
+        absXVal = (absXVal > ANALOG_STICK_MAX_THRESHOLD) ? ANALOG_STICK_MAX_THRESHOLD : absXVal;
+        absYVal = (absYVal > ANALOG_STICK_MAX_THRESHOLD) ? ANALOG_STICK_MAX_THRESHOLD : absYVal;
+
+        // remove the dead zone and map the resulting range to 0.f-1.f
+        float resultX = static_cast<float>(absXVal - ANALOG_STICK_MIN_THRESHOLD) * STICK_RANGE_UNIT;
+        float resultY = static_cast<float>(absYVal - ANALOG_STICK_MIN_THRESHOLD) * STICK_RANGE_UNIT;
+
+        if(userInput.stick_x < 0)
+        {
+            resultX = -resultX;
+        }
+        if(userInput.stick_y > 0)
+        {
+            // up in the UI means negative y values
+            resultY = -resultY;
+        }
+        return FloatPoint{resultX, resultY};
+    }
+
+    return FloatPoint{0.f, 0.f};
+}
+
+MoveScrollWidgetWindowAnimation::MoveScrollWidgetWindowAnimation(ScrollWidget* list)
+    : AbstractAnimation(1.f)
+    , list_(list)
+    , windowStartPoint_({0})
+    , windowEndPoint_({0})
+{
+}
+
+MoveScrollWidgetWindowAnimation::~MoveScrollWidgetWindowAnimation()
+{
+}
+
+AnimationDistanceTimeFunctionType MoveScrollWidgetWindowAnimation::getDistanceTimeFunctionType() const
+{
+    return AnimationDistanceTimeFunctionType::LINEAR;
+}
+
+uint32_t MoveScrollWidgetWindowAnimation::getDurationInMs() const
+{
+    return AbstractUIScene::MINIMUM_TIME_BETWEEN_INPUT_EVENTS;
+}
+
+void MoveScrollWidgetWindowAnimation::start(const Point& startPoint, const Point& endPoint)
+{
+    windowStartPoint_ = startPoint;
+    windowEndPoint_ = endPoint;
+}
+
+void MoveScrollWidgetWindowAnimation::apply(float pos)
+{
+    const int px = static_cast<int>(ceil(windowStartPoint_.x + (pos * (windowEndPoint_.x - windowStartPoint_.x))));
+    const int py = static_cast<int>(ceil(windowStartPoint_.y + (pos * (windowEndPoint_.y - windowStartPoint_.y))));
+    list_->setWindowStart(Point{px, py});
+}
+
+ScrollWidget::ScrollWidget(AnimationManager& animManager)
+    : windowAnimation_(this)
+    , widgets_()
+    , style_({0})
+    , animManager_(animManager)
+    , bounds_({0})
+    , windowBounds_({0})
+    , visible_(true)
+    , focused_(false)
+{
+    animManager_.add(&windowAnimation_);
+}
+
+ScrollWidget::~ScrollWidget()
+{
+    animManager_.remove(&windowAnimation_);
+}
+
+bool ScrollWidget::isFocused() const
+{
+    return focused_;
+}
+
+void ScrollWidget::setFocused(bool isFocused)
+{
+    focused_ = isFocused;
+}
+
+bool ScrollWidget::isVisible() const
+{
+    return visible_;
+}
+
+void ScrollWidget::setVisible(bool visible)
+{
+    visible_ = visible;
+}
+
+Rectangle ScrollWidget::getBounds() const
+{
+    return bounds_;
+}
+
+void ScrollWidget::setBounds(const Rectangle& bounds)
+{
+    bounds_ = bounds;
+}
+
+Dimensions ScrollWidget::getSize() const
+{
+    return Dimensions{.width = bounds_.width, .height = bounds_.height};
+}
+
+void ScrollWidget::setStyle(const ScrollWidgetStyle& style)
+{
+    style_ = style;
+}
+
+void ScrollWidget::addWidget(IWidget* widget)
+{
+    widgets_.push_back(widget);
+    growWindow(widget);
+}
+
+void ScrollWidget::removeWidget(IWidget* widget)
+{
+    auto it = std::find(widgets_.begin(), widgets_.end(), widget);
+    if(it != widgets_.end())
+    {
+        widgets_.erase(it);
+    }
+    recalculateWindowSize();
+}
+
+bool ScrollWidget::handleUserInput(const joypad_inputs_t& userInput)
+{
+    if(!focused_ || style_.scrollStep == 0)
+    {
+        return false;
+    }
+
+    const FloatVector scrollDirection = determineScrollDirection(userInput);
+    if(scrollDirection.x == 0.f && scrollDirection.y == 0.f)
+    {
+        return false;
+    }
+    if(!windowAnimation_.isFinished())
+    {
+        windowAnimation_.skipToEnd();
+    }
+
+    const Point windowStartPoint = {.x = windowBounds_.x, .y = windowBounds_.y};
+    Point windowEndPoint = {.x = windowBounds_.x, .y = windowBounds_.y};
+
+    windowEndPoint.x += static_cast<int>(ceil(scrollDirection.x * style_.scrollStep));
+    windowEndPoint.y += static_cast<int>(ceil(scrollDirection.y * style_.scrollStep));
+    windowAnimation_.start(windowStartPoint, windowEndPoint);
+
+    return true;
+}
+
+void ScrollWidget::render(RDPQGraphics& gfx, const Rectangle& parentBounds)
+{
+    if(!visible_)
+    {
+        return;
+    }
+    
+    const Rectangle myAbsoluteBounds = addOffset(bounds_, parentBounds);
+
+    // we "correct" the x/y coords here because the child widget
+    // will use addOffset() to apply its relative bounds (which may have higher xy coords than the width and height of the window) to the parentBounds
+    // by doing this correction, we compensate for the window start offset
+    const Rectangle absoluteWindowStartBounds = Rectangle{
+        .x = myAbsoluteBounds.x - windowBounds_.x, 
+        .y = myAbsoluteBounds.y - windowBounds_.y,
+        .width = myAbsoluteBounds.width,
+        .height = myAbsoluteBounds.height
+    };
+
+    // the bounds of the widget instances are all relative to the top of the scroll widget.
+    // so is the windowStart_
+    // so we need to define a rectangle to define the overlap in order to decide whether a widget needs to be rendered at all.
+    const Rectangle relativeWindowRect = {
+        .x = windowBounds_.x,
+        .y = windowBounds_.y,
+        .width = bounds_.width,
+        .height = bounds_.height
+    };
+
+    const Rectangle prevClip = gfx.getClippingRectangle();
+    gfx.setClippingRectangle(myAbsoluteBounds);
+
+    for(IWidget* widget : widgets_)
+    {
+        if(doRectanglesOverlap(relativeWindowRect, widget->getBounds()))
+        {
+            widget->render(gfx, absoluteWindowStartBounds);
+        }
+    }
+    gfx.setClippingRectangle(prevClip);
+}
+
+void ScrollWidget::setWindowStart(const Point& windowStart)
+{
+    windowBounds_.x = windowStart.x;
+    windowBounds_.y = windowStart.y;
+}
+
+float ScrollWidget::getWindowProgressX() const
+{
+    const float maxX = windowBounds_.width - bounds_.width;
+    return static_cast<float>(windowBounds_.x) / maxX;
+}
+
+float ScrollWidget::getWindowProgressY() const
+{
+    const double maxY = windowBounds_.height - bounds_.height;
+    return static_cast<float>(windowBounds_.y) / maxY;
+}
+
+void ScrollWidget::growWindow(IWidget* widget)
+{
+    const Rectangle widgetBounds = widget->getBounds();
+
+    const int widgetMaxX = widgetBounds.x + widgetBounds.width;
+    const int widgetMaxY = widgetBounds.y + widgetBounds.height;
+
+    if(widgetMaxX > windowBounds_.width)
+    {
+        windowBounds_.width = widgetMaxX;
+    }
+    if(widgetMaxY > windowBounds_.height)
+    {
+        windowBounds_.height = widgetMaxY;
+    }
+}
+
+void ScrollWidget::recalculateWindowSize()
+{
+    windowBounds_.width = 0;
+    windowBounds_.height = 0;
+    for(IWidget* widget : widgets_)
+    {
+        growWindow(widget);
+    }
+}