move MainWindow and Screen stuff to separate files; WIP

src/frontend/qt_sdl/Screen.h

@@ -0,0 +1,155 @@
+/*
+    Copyright 2016-2023 melonDS team
+
+    This file is part of melonDS.
+
+    melonDS 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.
+
+    melonDS 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 melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef SCREEN_H
+#define SCREEN_H
+
+#include "glad/glad.h"
+#include "FrontendUtil.h"
+#include "duckstation/gl/context.h"
+
+#include <QWidget>
+#include <QWindow>
+#include <QMainWindow>
+#include <QImage>
+#include <QActionGroup>
+#include <QTimer>
+#include <QMutex>
+#include <QScreen>
+#include <QCloseEvent>
+
+
+class EmuThread;
+
+
+const struct { int id; float ratio; const char* label; } aspectRatios[] =
+{
+    { 0, 1,                       "4:3 (native)" },
+    { 4, (5.f  / 3) / (4.f / 3), "5:3 (3DS)"},
+    { 1, (16.f / 9) / (4.f / 3),  "16:9" },
+    { 2, (21.f / 9) / (4.f / 3),  "21:9" },
+    { 3, 0,                       "window" }
+};
+constexpr int AspectRatiosNum = sizeof(aspectRatios) / sizeof(aspectRatios[0]);
+
+
+class ScreenHandler
+{
+    Q_GADGET
+
+public:
+    ScreenHandler(QWidget* widget);
+    virtual ~ScreenHandler();
+    QTimer* setupMouseTimer();
+    void updateMouseTimer();
+    QTimer* mouseTimer;
+    QSize screenGetMinSize(int factor);
+
+protected:
+    void screenSetupLayout(int w, int h);
+
+    void screenOnMousePress(QMouseEvent* event);
+    void screenOnMouseRelease(QMouseEvent* event);
+    void screenOnMouseMove(QMouseEvent* event);
+
+    void screenHandleTablet(QTabletEvent* event);
+    void screenHandleTouch(QTouchEvent* event);
+
+    float screenMatrix[Frontend::MaxScreenTransforms][6];
+    int screenKind[Frontend::MaxScreenTransforms];
+    int numScreens;
+
+    bool touching = false;
+
+    void showCursor();
+};
+
+
+class ScreenPanelNative : public QWidget, public ScreenHandler
+{
+    Q_OBJECT
+
+public:
+    explicit ScreenPanelNative(QWidget* parent);
+    virtual ~ScreenPanelNative();
+
+protected:
+    void paintEvent(QPaintEvent* event) override;
+
+    void resizeEvent(QResizeEvent* event) override;
+
+    void mousePressEvent(QMouseEvent* event) override;
+    void mouseReleaseEvent(QMouseEvent* event) override;
+    void mouseMoveEvent(QMouseEvent* event) override;
+
+    void tabletEvent(QTabletEvent* event) override;
+    bool event(QEvent* event) override;
+private slots:
+    void onScreenLayoutChanged();
+
+private:
+    void setupScreenLayout();
+
+    QImage screen[2];
+    QTransform screenTrans[Frontend::MaxScreenTransforms];
+};
+
+
+class ScreenPanelGL : public QWidget, public ScreenHandler
+{
+    Q_OBJECT
+
+public:
+    explicit ScreenPanelGL(QWidget* parent);
+    virtual ~ScreenPanelGL();
+
+    std::optional<WindowInfo> getWindowInfo();
+
+    bool createContext();
+
+    GL::Context* getContext() { return glContext.get(); }
+
+    void transferLayout(EmuThread* thread);
+protected:
+
+    qreal devicePixelRatioFromScreen() const;
+    int scaledWindowWidth() const;
+    int scaledWindowHeight() const;
+
+    QPaintEngine* paintEngine() const override;
+
+    void resizeEvent(QResizeEvent* event) override;
+
+    void mousePressEvent(QMouseEvent* event) override;
+    void mouseReleaseEvent(QMouseEvent* event) override;
+    void mouseMoveEvent(QMouseEvent* event) override;
+
+    void tabletEvent(QTabletEvent* event) override;
+    bool event(QEvent* event) override;
+
+private slots:
+    void onScreenLayoutChanged();
+
+private:
+    void setupScreenLayout();
+
+    std::unique_ptr<GL::Context> glContext;
+};
+
+#endif // SCREEN_H
+