From 257aa3c3d2b5e700baa99ff999740a3c395073bf Mon Sep 17 00:00:00 2001
From: John McCardle <mccardle.john@gmail.com>
Date: Sat, 4 Mar 2023 23:04:16 -0500
Subject: [PATCH] Fully python-driven scene. Lots of interaction needs testing
 but the broad strokes are there for mouse pan/zoom on multiple grids and any
 number of UIs

---
 src/GameEngine.cpp  |   6 +-
 src/Grid.cpp        |   2 +-
 src/Grid.h          |   2 +
 src/McRFPy_API.cpp  |   1 +
 src/McRFPy_API.h    |   2 +-
 src/PythonScene.cpp | 159 ++++++++++++++++++++++++++++++++++++++++++++
 src/PythonScene.h   |  21 ++++++
 src/Scene.h         |   1 +
 8 files changed, 191 insertions(+), 3 deletions(-)
 create mode 100644 src/PythonScene.cpp
 create mode 100644 src/PythonScene.h

diff --git a/src/GameEngine.cpp b/src/GameEngine.cpp
index 1599438..ea28547 100644
--- a/src/GameEngine.cpp
+++ b/src/GameEngine.cpp
@@ -3,6 +3,7 @@
 #include "UITestScene.h"
 #include "ActionCode.h"
 #include "McRFPy_API.h"
+#include "PythonScene.h"
 
 GameEngine::GameEngine()
 {
@@ -10,18 +11,21 @@ GameEngine::GameEngine()
     window.create(sf::VideoMode(1024, 768), "McRogueFace Engine by John McCardle");
     visible = window.getDefaultView();
     window.setFramerateLimit(30);
-    scene = "menu";
+    scene = "py";
     //std::cout << "Constructing MenuScene" << std::endl;
     scenes["menu"] = new MenuScene(this);
     //std::cout << "Constructed MenuScene" <<std::endl;
     scenes["play"] = new UITestScene(this);
     //api = new McRFPy_API(this);
+    
     McRFPy_API::game = this;
     McRFPy_API::api_init();
     McRFPy_API::executePyString("import mcrfpy");
     McRFPy_API::executePyString("from UIMenu import *");
     McRFPy_API::executePyString("from Grid import *");
 
+    scenes["py"] = new PythonScene(this, "TestScene");
+
     IndexSprite::game = this;
 }
 
diff --git a/src/Grid.cpp b/src/Grid.cpp
index 4a420b7..f63baa9 100644
--- a/src/Grid.cpp
+++ b/src/Grid.cpp
@@ -15,7 +15,7 @@ Grid::Grid(int gx, int gy, int gs, int _x, int _y, int _w, int _h):
     grid_size(gs),
     grid_x(gx), grid_y(gy), 
     zoom(1.0f), center_x((gx/2) * gs), center_y((gy/2) * gs),
-    texture_width(12), texture_height(11)
+    texture_width(12), texture_height(11), visible(false)
 {
     //grid_size = gs;
     //zoom = 1.0f;
diff --git a/src/Grid.h b/src/Grid.h
index 3e718aa..283d0aa 100644
--- a/src/Grid.h
+++ b/src/Grid.h
@@ -20,11 +20,13 @@ private:
 public:
     Grid();
     sf::RectangleShape box; // view on window
+    bool visible;
     sf::Texture texture;
     sf::Sprite sprite, output;
     sf::RenderTexture renderTexture;
     void setSprite(int);
     const int texture_width, texture_height;
+    auto contains(sf::Vector2i p) { return box.getGlobalBounds().contains(p.x, p.y); }
 
     Grid(int gx, int gy, int gs, int _x, int _y, int _w, int _h);
     int grid_x, grid_y; // rectangle map size (integer - sprites)
diff --git a/src/McRFPy_API.cpp b/src/McRFPy_API.cpp
index 26dc815..b5bdd19 100644
--- a/src/McRFPy_API.cpp
+++ b/src/McRFPy_API.cpp
@@ -7,6 +7,7 @@
 std::map<std::string, UIMenu*> McRFPy_API::menus;
 std::map<std::string, Grid*> McRFPy_API::grids;
 std::map<std::string, PyObject*> McRFPy_API::callbacks;
+EntityManager McRFPy_API::entities;
 
 static PyMethodDef mcrfpyMethods[] = {
     {"drawSprite", McRFPy_API::_drawSprite, METH_VARARGS,
diff --git a/src/McRFPy_API.h b/src/McRFPy_API.h
index dc558f3..c6c896d 100644
--- a/src/McRFPy_API.h
+++ b/src/McRFPy_API.h
@@ -42,7 +42,7 @@ public:
 
     // Jank mode engage: let the API hold data for Python to hack on
     static std::map<std::string, UIMenu*> menus;
-    EntityManager entities; // this is also kinda good, entities not on the current grid can still act (like monsters following you through doors??)
+    static EntityManager entities; // this is also kinda good, entities not on the current grid can still act (like monsters following you through doors??)
     static std::map<std::string, Grid*> grids;
 
     static std::map<std::string, PyObject*> callbacks;
diff --git a/src/PythonScene.cpp b/src/PythonScene.cpp
new file mode 100644
index 0000000..73edcaa
--- /dev/null
+++ b/src/PythonScene.cpp
@@ -0,0 +1,159 @@
+#include "PythonScene.h"
+#include "ActionCode.h"
+#include "McRFPy_API.h"
+
+PythonScene::PythonScene(GameEngine* g, std::string pymodule)
+: Scene(g) {
+    // mouse events
+    registerAction(ActionCode::MOUSEBUTTON + sf::Mouse::Left, "click");
+    registerAction(ActionCode::MOUSEBUTTON + sf::Mouse::Left, "rclick");
+    registerAction(ActionCode::MOUSEWHEEL + ActionCode::WHEEL_DEL, "wheel_up");
+    registerAction(ActionCode::MOUSEWHEEL + ActionCode::WHEEL_NEG + ActionCode::WHEEL_DEL, "wheel_down");
+
+    // keyboard events
+    registerAction(ActionCode::KEY + sf::Keyboard::Q, "upleft");
+    registerAction(ActionCode::KEY + sf::Keyboard::W, "up");
+    registerAction(ActionCode::KEY + sf::Keyboard::E, "upright");
+    registerAction(ActionCode::KEY + sf::Keyboard::A, "left");
+    registerAction(ActionCode::KEY + sf::Keyboard::S, "down");
+    registerAction(ActionCode::KEY + sf::Keyboard::D, "right");
+    registerAction(ActionCode::KEY + sf::Keyboard::Z, "downleft");
+    registerAction(ActionCode::KEY + sf::Keyboard::X, "wait");
+    registerAction(ActionCode::KEY + sf::Keyboard::C, "downright");
+
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad7, "upleft");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad8, "up");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad9, "upright");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad4, "left");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad5, "wait");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad6, "right");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad1, "downleft");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad2, "down");
+    registerAction(ActionCode::KEY + sf::Keyboard::Numpad3, "downright");
+
+    // window resize
+    registerAction(0, "event");
+
+    dragging = false;
+    
+    // import pymodule and call start()
+    McRFPy_API::executePyString("import " + pymodule);
+    McRFPy_API::executePyString(pymodule + ".start()");
+}
+
+void PythonScene::update() {
+    McRFPy_API::entities.update();
+
+    // check if left click is still down & mouse has moved
+    // continue the drag motion
+    if (dragging && drag_grid) {
+        auto mousepos = sf::Mouse::getPosition(game->getWindow());
+        auto dx = mousepos.x - mouseprev.x,
+             dy = mousepos.y - mouseprev.y;
+        drag_grid->center_x += (dx / drag_grid->zoom);
+        drag_grid->center_y += (dy / drag_grid->zoom);
+    }
+
+}
+
+void PythonScene::doLClick(sf::Vector2i mousepos) {
+    // UI buttons get first chance
+    for (auto pair : McRFPy_API::menus) {
+        if (!pair.second->visible) continue;
+        for (auto b : pair.second->buttons) {
+            if (b.contains(mousepos)) {
+                McRFPy_API::doAction(b.getAction());
+                return;
+            }
+        }
+    }
+    // left clicking a grid to select a square
+    for (auto pair : McRFPy_API::grids) {
+        if (!pair.second->visible) continue;
+        if (pair.second->contains(mousepos)) {
+            // grid was clicked
+            return;
+        }
+    }
+}
+
+void PythonScene::doRClick(sf::Vector2i mousepos) {
+    // just grids for right click
+    for (auto pair : McRFPy_API::grids) {
+        if (!pair.second->visible) continue;
+        if (pair.second->contains(mousepos)) {
+            // grid was clicked
+            return;
+        }
+    }
+}
+
+void PythonScene::doZoom(sf::Vector2i mousepos, int value) {
+    // just grids for right click
+    for (auto pair : McRFPy_API::grids) {
+        if (!pair.second->visible) continue;
+        if (pair.second->contains(mousepos)) {
+            // grid was zoomed
+            float new_zoom = pair.second->zoom + (value * 0.25);
+            if (new_zoom >= 0.5 && new_zoom <= 5.0) {
+                pair.second->zoom = new_zoom;
+            }
+        }
+    }
+}
+
+void PythonScene::doAction(std::string name, std::string type) {
+    auto mousepos = sf::Mouse::getPosition(game->getWindow());
+    if (ACTIONONCE("click")) {
+        // left click start
+        dragstart = mousepos;
+        mouseprev = mousepos;
+        dragging = true;
+        // determine the grid that contains the cursor
+        for (auto pair : McRFPy_API::grids) {
+            if (!pair.second->visible) continue;
+            if (pair.second->contains(mousepos)) {
+                // grid was clicked
+                drag_grid = pair.second;
+            }
+        }
+    }
+    else if (ACTIONAFTER("click")) {
+        // left click end
+        // if click ended without starting a drag event, try lclick?
+        if (dragstart == mousepos) {
+            // mouse did not move, do click
+            doLClick(mousepos);
+        }
+        dragging = false;
+        drag_grid = NULL;
+    }
+    else if (ACTIONONCE("rclick")) {
+        // not going to test for right click drag - just rclick
+        doRClick(mousepos);
+    }
+    else if (ACTIONONCE("wheel_up")) {
+        // try zoom in
+        doZoom(mousepos, 1);
+    }
+    else if (ACTIONONCE("wheel_down")) {
+        // try zoom out
+        doZoom(mousepos, -1);
+    }
+}
+
+void PythonScene::sRender() {
+    game->getWindow().clear();
+
+    for (auto pair: McRFPy_API::grids) {
+        if (!pair.second->visible) continue;
+        pair.second->render(game->getWindow());
+    }
+
+    for (auto pair: McRFPy_API::menus) {
+        if (!pair.second->visible) continue;
+        pair.second->render(game->getWindow());
+    }
+
+    game->getWindow().display();
+}
diff --git a/src/PythonScene.h b/src/PythonScene.h
new file mode 100644
index 0000000..7bf236d
--- /dev/null
+++ b/src/PythonScene.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include "Common.h"
+#include "Scene.h"
+#include "GameEngine.h"
+#include "Grid.h"
+
+class PythonScene: public Scene
+{
+    sf::Vector2i dragstart, mouseprev;
+    bool dragging;
+    Grid* drag_grid;
+    void doLClick(sf::Vector2i);
+    void doRClick(sf::Vector2i);
+    void doZoom(sf::Vector2i, int);
+public:
+    PythonScene(GameEngine*, std::string);
+    void update() override final;
+    void doAction(std::string, std::string) override final;
+    void sRender() override final;
+};
diff --git a/src/Scene.h b/src/Scene.h
index 0eec797..19a663f 100644
--- a/src/Scene.h
+++ b/src/Scene.h
@@ -3,6 +3,7 @@
 // macros for scene input
 #define ACTION(X, Y) (name.compare(X) == 0 && type.compare(Y) == 0)
 #define ACTIONONCE(X) ((name.compare(X) == 0 && type.compare("start") == 0 && !actionState[name]))
+#define ACTIONAFTER(X) ((name.compare(X) == 0 && type.compare("end") == 0 && actionState[name]))
 
 #include "Common.h"
 //#include "GameEngine.h"