From fec7e08c2b5b0b9e745a0df0bdc6f090f6d9c6be Mon Sep 17 00:00:00 2001
From: Ariari04 <anime.beksultan@gmail.com>
Date: Wed, 10 Dec 2025 20:39:09 +0600
Subject: [PATCH] added dragging scroll button for music volume

---
 Game.cpp | 70 ++++++++++++++++++++++++++++++++++++++++++++++++--------
 Game.h   | 12 ++++++++++
 2 files changed, 72 insertions(+), 10 deletions(-)

diff --git a/Game.cpp b/Game.cpp
index d0f3956..33602a0 100755
--- a/Game.cpp
+++ b/Game.cpp
@@ -233,9 +233,7 @@ void Game::setup() {
 
     musicVolumeBarButtonTexture = std::make_unique<Texture>(CreateTextureDataFromPng("./resources/musicVolumeBarButton.png", CONST_ZIP_FILE));
 
-    float musicVolumeBarButtonButtonCenterX = 1195.0f;
     float musicVolumeBarButtonButtonCenterY = 350.0f;
-    float musicVolumeBarButtonButtonRadius = 25.0f;
 
     musicVolumeBarButton.data.PositionData.push_back({ musicVolumeBarButtonButtonCenterX - musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY - musicVolumeBarButtonButtonRadius, 0 });
     musicVolumeBarButton.data.PositionData.push_back({ musicVolumeBarButtonButtonCenterX - musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY + musicVolumeBarButtonButtonRadius, 0 });
@@ -366,7 +364,37 @@ void Game::drawBoxes()
     renderer.shaderManager.PopShader();
     CheckGlError();
 }
+void Game::UpdateVolumeKnob() {
+    float musicVolumeBarButtonButtonCenterY = volumeBarMinY + musicVolume * (volumeBarMaxY - volumeBarMinY);
 
+    auto& pos = musicVolumeBarButton.data.PositionData;
+
+    pos[0] = { musicVolumeBarButtonButtonCenterX - musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY - musicVolumeBarButtonButtonRadius, 0 };
+    pos[1] = { musicVolumeBarButtonButtonCenterX - musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY + musicVolumeBarButtonButtonRadius, 0 };
+    pos[2] = { musicVolumeBarButtonButtonCenterX + musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY + musicVolumeBarButtonButtonRadius, 0 };
+    pos[3] = { musicVolumeBarButtonButtonCenterX - musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY - musicVolumeBarButtonButtonRadius, 0 };
+    pos[4] = { musicVolumeBarButtonButtonCenterX + musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY + musicVolumeBarButtonButtonRadius, 0 };
+    pos[5] = { musicVolumeBarButtonButtonCenterX + musicVolumeBarButtonButtonRadius, musicVolumeBarButtonButtonCenterY - musicVolumeBarButtonButtonRadius, 0 };
+
+    musicVolumeBarButton.RefreshVBO();
+
+}
+
+void Game::UpdateVolumeFromMouse(int mouseX, int mouseY) {
+
+    int uiX = mouseX;
+    int uiY = Environment::height - mouseY;
+    if (uiY < volumeBarMinY || uiY > volumeBarMaxY)
+    {
+        return;
+    }
+
+    float t = (uiY - volumeBarMinY) / (volumeBarMaxY - volumeBarMinY);
+    if (t < 0.0f) t = 0.0f;
+    if (t > 1.0f) t = 1.0f;
+    musicVolume = t;
+    UpdateVolumeKnob();
+}
 void Game::drawUI()
 {
     static const std::string defaultShaderName = "default";
@@ -510,21 +538,43 @@ void Game::update() {
         }
         else if (event.type == SDL_MOUSEBUTTONDOWN) {
             // 1. Обработка нажатия кнопки мыши
-            std::cout << event.button.x << " " << event.button.y << '\n';
-            Environment::tapDownHold = true;
-            // Координаты начального нажатия
-            Environment::tapDownStartPos.v[0] = event.button.x;
-            Environment::tapDownStartPos.v[1] = event.button.y;
-            // Начальная позиция также становится текущей
-            Environment::tapDownCurrentPos.v[0] = event.button.x;
-            Environment::tapDownCurrentPos.v[1] = event.button.y;
+
+            int mx = event.button.x;
+            int my = event.button.y;
+
+            std::cout << mx << " " << my << '\n'; 
+            int uiX = mx;
+            int uiY = Environment::height - my;
+            if (uiX >= volumeBarMinX && uiX <= volumeBarMaxX &&
+                uiY >= volumeBarMinY && uiY <= volumeBarMaxY) {
+                isDraggingVolume = true;
+                UpdateVolumeFromMouse(mx, my);
+            }
+            else {
+                Environment::tapDownHold = true;
+                // Координаты начального нажатия
+                Environment::tapDownStartPos.v[0] = event.button.x;
+                Environment::tapDownStartPos.v[1] = event.button.y;
+                // Начальная позиция также становится текущей
+                Environment::tapDownCurrentPos.v[0] = event.button.x;
+                Environment::tapDownCurrentPos.v[1] = event.button.y;
+            }
+            
         }
         else if (event.type == SDL_MOUSEBUTTONUP) {
             // 2. Обработка отпускания кнопки мыши
+            isDraggingVolume = false;
             Environment::tapDownHold = false;
         }
         else if (event.type == SDL_MOUSEMOTION) {
             // 3. Обработка перемещения мыши
+            int mx = event.motion.x;
+            int my = event.motion.y;
+            
+            if (isDraggingVolume) {
+                // Двигаем мышь по слайдеру — меняем громкость и позицию кружка
+                UpdateVolumeFromMouse(mx, my);
+            }
             if (Environment::tapDownHold) {
                 // Обновление текущей позиции, если кнопка удерживается
                 Environment::tapDownCurrentPos.v[0] = event.motion.x;
diff --git a/Game.h b/Game.h
index 852df0c..34b608a 100755
--- a/Game.h
+++ b/Game.h
@@ -66,6 +66,18 @@ private:
 
     std::shared_ptr<Texture> musicVolumeBarButtonTexture;
     VertexRenderStruct musicVolumeBarButton;
+
+
+    bool isDraggingVolume = false;
+    float musicVolume = 1.0f;
+    float volumeBarMinX = 1190.0f;
+    float volumeBarMaxX = 1200.0f;
+    float volumeBarMinY = 100.0f;
+    float volumeBarMaxY = 600.0f;
+    float musicVolumeBarButtonButtonCenterX = 1195.0f;
+    float musicVolumeBarButtonButtonRadius = 25.0f;
+    void UpdateVolumeFromMouse(int mouseX, int mouseY);
+    void UpdateVolumeKnob();
 };
 
 } // namespace ZL
\ No newline at end of file