From 1945b04e69031adcf1b710204a761f1969d64c00 Mon Sep 17 00:00:00 2001
From: Yousef Khadadeh <erroratline0@gmail.com>
Date: Fri, 3 Oct 2025 09:11:22 +0300
Subject: [PATCH] Added a flip zoom tool direction option

---
 src/DrawCamera.cpp | 2 +-
 src/Toolbar.cpp    | 3 +++
 src/Toolbar.hpp    | 2 ++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/DrawCamera.cpp b/src/DrawCamera.cpp
index 92e4b8f..de8e818 100755
--- a/src/DrawCamera.cpp
+++ b/src/DrawCamera.cpp
@@ -123,7 +123,7 @@ void DrawCamera::update_main(World& w) {
         }
         isAccurateZooming = newIsAccurateZooming;
         if(isAccurateZooming) {
-            WorldScalar zoomFactor(std::pow(1.0 + w.main.toolbar.dragZoomSpeed, -w.main.input.mouse.move.y()));
+            WorldScalar zoomFactor(std::pow(1.0 + w.main.toolbar.dragZoomSpeed, w.main.toolbar.flipZoomToolDirection ? w.main.input.mouse.move.y() : -w.main.input.mouse.move.y()));
             c.scale(zoomFactor);
             WorldVec mVec = startZoomCameraPos - startZoomMousePos;
             WorldScalar mX = c.inverseScale / startZoomVal;
diff --git a/src/Toolbar.cpp b/src/Toolbar.cpp
index d370296..d544771 100644
--- a/src/Toolbar.cpp
+++ b/src/Toolbar.cpp
@@ -226,6 +226,7 @@ nlohmann::json Toolbar::get_config_json() {
     toRet["velocityAffectsBrushWidth"] = velocityAffectsBrushWidth;
     toRet["jumpTransitionEasing"] = jumpTransitionEasing;
     toRet["defaultCanvasBackgroundColor"] = main.defaultCanvasBackgroundColor;
+    toRet["flipZoomToolDirection"] = flipZoomToolDirection;
 #ifndef __EMSCRIPTEN__
     toRet["checkForUpdates"] = updateCheckerData.checkForUpdates;
 #endif
@@ -278,6 +279,7 @@ void Toolbar::set_config_json(const nlohmann::json& j) {
     j.at("velocityAffectsBrushWidth").get_to(velocityAffectsBrushWidth);
     j.at("jumpTransitionEasing").get_to(jumpTransitionEasing);
     j.at("defaultCanvasBackgroundColor").get_to(main.defaultCanvasBackgroundColor);
+    j.at("flipZoomToolDirection").get_to(flipZoomToolDirection);
 #ifndef __EMSCRIPTEN__
     j.at("checkForUpdates").get_to(updateCheckerData.checkForUpdates);
 #endif
@@ -1381,6 +1383,7 @@ void Toolbar::options_menu() {
                                         #endif
                                         gui.slider_scalar_field("drag zoom slider", "Drag zoom speed", &dragZoomSpeed, 0.0, 1.0, 3);
                                         gui.slider_scalar_field("scroll zoom slider", "Scroll zoom speed", &scrollZoomSpeed, 0.0, 1.0, 3);
+                                        gui.checkbox_field("flip zoom tool direction", "Flip zoom tool direction", &flipZoomToolDirection);
                                         gui.input_scalar_field("jump transition time", "Jump transition time", &jumpTransitionTime, 0.01f, 1000.0f, 2);
                                         gui.checkbox_field("changebrushwidthwithspeed", "Change brush size with mouse speed", &velocityAffectsBrushWidth);
                                         gui.pop_id();
diff --git a/src/Toolbar.hpp b/src/Toolbar.hpp
index 493ae4f..9d92e27 100644
--- a/src/Toolbar.hpp
+++ b/src/Toolbar.hpp
@@ -79,6 +79,8 @@ class Toolbar {
         Vector4f* colorRight = nullptr;
         std::optional<Vector2f> paintPopupLocation;
 
+        bool flipZoomToolDirection = false;
+
         float final_gui_scale();
     private:
         void calculate_final_gui_scale();