A2FingerTransformArea.h

/*
 * AUI Framework - Declarative UI toolkit for modern C++20
 * Copyright (C) 2020-2025 Alex2772 and Contributors
 *
 * SPDX-License-Identifier: MPL-2.0
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
#pragma once
 
#include "AUI/View/AViewContainer.h"
#include "AView.h"
#include "AUI/Util/AAngleRadians.h"
 
 
struct A2DTransform {
   glm::vec2 offset = {0.f, 0.f};
   AAngleRadians rotation;
   float scale = 1.f;
 
 
   void applyDelta(const A2DTransform& other) {
       scale *= other.scale;
       offset += other.offset;
       rotation += other.rotation;
   }
};
struct A2DTransform {…};

class API_AUI_VIEWS A2FingerTransformArea: public AViewContainer
{
public:
   A2FingerTransformArea();
 
   void onPointerPressed(const APointerPressedEvent& event) override;
   void onPointerMove(glm::vec2 pos, const APointerMoveEvent& event) override;
   void onPointerReleased(const APointerReleasedEvent& event) override;
 
   bool consumesClick(const glm::ivec2& pos) override;
 
signals:
   emits<A2DTransform> transformed;
 
private:
   struct TrackedPoint {
       glm::vec2 pos;
       APointerIndex pointerIndex;
   };
   ASmallVector<TrackedPoint, 8> mTrackedPoints;
 
};
class API_AUI_VIEWS A2FingerTransformArea: public AViewContainer {…};

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