text clears with dialog box

7 files changed, 91 insertions, 21 deletions

diff --git a/Scripts/init.lua b/Scripts/init.lua
index 7ac9160..370fc0e 100644
--- a/Scripts/init.lua
+++ b/Scripts/init.lua
@@ -1,4 +1,5 @@
 game.loadFont("default", "Assets/FreePixel.ttf", 16)
+game.loadFont("dialog", "Assets/FreePixel.ttf", 16)
 
 player = {
     Player = 0,
@@ -7,6 +8,7 @@ player = {
             self.Velocity.x = self.Velocity.x - 3.0
             --self.Velocity.y = self.Velocity.y - 1.0
             self.Render.flipx = true;
+            game.dialogClear()
         end,
         MoveLeftReleased = function(self)
             self.Velocity.x = self.Velocity.x + 3.0
@@ -29,7 +31,7 @@ player = {
         end,
         JumpKeyReleased = function(self)
             game.dialog(30, 150, 400, 100)
-            game.puts("default", 36, 52, "Hey. Hag?")
+            game.puts("dialog", 36, 52, "Hey. Hag?")
         end
     },
     Position = {
diff --git a/src/engine.cpp b/src/engine.cpp
index 02598d4..40f6e62 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -74,6 +74,8 @@ int Engine::init(void)
     script->addToGameNamespace("dialog",
         bindInstance(&UISystem::createDialogBox,
                      systems.system<UISystem>().get()));
+    script->addToGameNamespace("dialogClear",
+        [this] { events.emit<HideDialog>(); });
     script->init();
     
 
diff --git a/src/events/ui.hpp b/src/events/ui.hpp
new file mode 100644
index 0000000..7d4ad5c
--- /dev/null
+++ b/src/events/ui.hpp
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2022  Clyne Sullivan <clyne@bitgloo.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef EVENTS_UI_HPP_
+#define EVENTS_UI_HPP_
+
+struct HideDialog
+{
+    char unused;
+};
+
+#endif // EVENTS_UI_HPP
+
diff --git a/src/text.cpp b/src/text.cpp
index 5490224..83b881c 100644
--- a/src/text.cpp
+++ b/src/text.cpp
@@ -1,6 +1,7 @@
 #include "text.hpp"
 
 #include "events/render.hpp"
+#include "events/ui.hpp"
 
 #include <iostream>
 
@@ -18,6 +19,7 @@ void TextSystem::configure([[maybe_unused]] entityx::EntityManager& entities,
     shouldUpdateVBOs = false;
 
     events.subscribe<ShowTextEvent>(*this);
+    events.subscribe<HideDialog>(*this);
 
     if (FT_Init_FreeType(&freetype) != 0) {
         // TODO handle error
@@ -36,7 +38,9 @@ void TextSystem::update([[maybe_unused]] entityx::EntityManager& entites,
         updateVBOs();
 
         for (auto& [name, font] : fontData) {
-            if (font.text.size() != 0) {
+            if (font.changed) {
+                font.changed = false;
+
                 events.emit<NewRenderEvent>(font.vbo, font.tex, 0,
                                             font.buffer.size());
             }
@@ -49,6 +53,18 @@ void TextSystem::receive(const ShowTextEvent& ste)
     put(ste.font, ste.x, ste.y, ste.text);
 }
 
+void TextSystem::receive(const HideDialog&)
+{
+    auto fd = fontData.find("dialog");
+
+    if (fd != fontData.end()) {
+        auto& font = fd->second;
+
+        font.text.clear();
+        font.changed = true;
+    }
+}
+
 void TextSystem::loadFont(const std::string& name,
                           const std::string& file,
                           int size)
@@ -98,12 +114,6 @@ void TextSystem::loadFont(const std::string& name,
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
     glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 
-    //    // convert red-on-black to RGBA
-    //    auto& g = face->glyph;
-    //    std::vector<uint32_t> buf (g->bitmap.width * g->bitmap.rows, 0xFFFFFF);
-    //    for (auto j = buf.size(); j--;)
-    //        buf[j] |= g->bitmap.buffer[j] << 24;
-
     // Load each character and add it to the texture
     //
 
@@ -137,16 +147,19 @@ void TextSystem::loadFont(const std::string& name,
               << font.tex << ")" << std::endl;
 }
 
-void TextSystem::put(const std::string& font,
+void TextSystem::put(const std::string& fname,
                      float x,
                      float y,
                      const std::string& text)
 {
-    if (fontData.find(font) == fontData.end())
+    auto fd = fontData.find(fname);
+    if (fd == fontData.end())
         return;
-    auto& vector = fontData[font].text;
+    auto& font = fd->second;
+
+    auto& vector = font.text;
 
-    y = -(y + fontData[font].fontSize);
+    y = -(y + font.fontSize);
 
     const auto it = std::find_if(vector.begin(), vector.end(),
         [&x, &y](const Text& t) {
@@ -156,9 +169,10 @@ void TextSystem::put(const std::string& font,
         *it = Text(text, x, y);
     } else {
         // Invert y axis so positive grows south.
-        fontData[font].text.emplace_back(text, x, y);
+        vector.emplace_back(text, x, y);
     }
 
+    font.changed = true;
     shouldUpdateVBOs = true;
 }
 
diff --git a/src/text.hpp b/src/text.hpp
index 0f98688..de25459 100644
--- a/src/text.hpp
+++ b/src/text.hpp
@@ -23,6 +23,8 @@
 #ifndef SYSTEM_TEXT_HPP_
 #define SYSTEM_TEXT_HPP_
 
+#include "events/ui.hpp"
+
 #include <entityx/entityx.h>
 #include <ft2build.h>
 #include <freetype/freetype.h>
@@ -67,6 +69,7 @@ struct Font {
 
     float width;
     float height;
+    bool changed = false;
 
     std::array<FT_Info, 96> data;
     // Stores currently shown text at given index into VBO?
@@ -106,6 +109,7 @@ public:
                 entityx::TimeDelta dt) final;
 
     void receive(const ShowTextEvent&);
+    void receive(const HideDialog&);
 
     void put(const std::string& font, float x, float y, const std::string& text);
 
diff --git a/src/ui.cpp b/src/ui.cpp
index 1754686..009d6ff 100644
--- a/src/ui.cpp
+++ b/src/ui.cpp
@@ -8,8 +8,9 @@
 
 static const unsigned int NRE_TEX_DATA = 0xBBBBBBBB;
 
-void UISystem::configure(entityx::EntityManager&, entityx::EventManager&)
+void UISystem::configure(entityx::EntityManager&, entityx::EventManager &events)
 {
+    events.subscribe<HideDialog>(*this);
 }
 
 void UISystem::createDialogBox(float x, float y, float w, float h)
@@ -22,14 +23,31 @@ void UISystem::update(entityx::EntityManager&,
     entityx::EventManager& events,
     entityx::TimeDelta)
 {
-    for (auto& b : m_boxes) {
-        if (b.vbo == 0) {
-            auto nre = generateDialogBox(b);
-            events.emit<NewRenderEvent>(nre);
+    if (m_clear_boxes) {
+        m_clear_boxes = false;
+
+        for (const auto& b : m_boxes) {
+            if (b.vbo != 0) {
+                events.emit<DelRenderEvent>(b.vbo);
+            }
+        }
+
+        m_boxes.clear();
+    } else {
+        for (auto& b : m_boxes) {
+            if (b.vbo == 0) {
+                auto nre = generateDialogBox(b);
+                events.emit<NewRenderEvent>(nre);
+            }
         }
     }
 }
 
+void UISystem::receive(const HideDialog&)
+{
+    m_clear_boxes = true;
+}
+
 NewRenderEvent UISystem::generateDialogBox(Box& box)
 {
     NewRenderEvent nre;
diff --git a/src/ui.hpp b/src/ui.hpp
index 1986c8f..e6e1c09 100644
--- a/src/ui.hpp
+++ b/src/ui.hpp
@@ -22,15 +22,15 @@
 #define SYSTEM_UI_HPP_
 
 #include "events/render.hpp"
+#include "events/ui.hpp"
 
 #include <entityx/entityx.h>
 #include <GL/glew.h>
-#include <SDL2/SDL.h>
-#include <SDL2/SDL_opengl.h>
 
 #include <vector>
 
-class UISystem : public entityx::System<UISystem>
+class UISystem : public entityx::System<UISystem>,
+                 public entityx::Receiver<UISystem>
 {
 public:
     void configure(entityx::EntityManager&, entityx::EventManager&) final;
@@ -39,6 +39,8 @@ public:
                 entityx::EventManager&,
                 entityx::TimeDelta) final;
 
+    void receive(const HideDialog &hd);
+
     void createDialogBox(float x, float y, float w, float h);
 
 private:
@@ -48,6 +50,7 @@ private:
     };
 
     std::vector<Box> m_boxes;
+    bool m_clear_boxes = false;
 
     NewRenderEvent generateDialogBox(Box& box);
 };