Merge pull request #635 from Arisotura/qt

Qt

1 files changed, 244 insertions, 0 deletions

diff --git a/src/frontend/qt_sdl/Input.cpp b/src/frontend/qt_sdl/Input.cpp
new file mode 100644
index 0000000..84d20ad
--- /dev/null
+++ b/src/frontend/qt_sdl/Input.cpp
@@ -0,0 +1,244 @@
+/*
+    Copyright 2016-2020 Arisotura
+
+    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/.
+*/
+
+#include <QKeyEvent>
+#include <SDL2/SDL.h>
+
+#include "Input.h"
+#include "PlatformConfig.h"
+
+
+namespace Input
+{
+
+int JoystickID;
+SDL_Joystick* Joystick = nullptr;
+
+u32 KeyInputMask, JoyInputMask;
+u32 KeyHotkeyMask, JoyHotkeyMask;
+u32 HotkeyMask, LastHotkeyMask;
+u32 HotkeyPress, HotkeyRelease;
+
+u32 InputMask;
+
+
+void Init()
+{
+    KeyInputMask = 0xFFF;
+    JoyInputMask = 0xFFF;
+    InputMask = 0xFFF;
+
+    KeyHotkeyMask = 0;
+    JoyHotkeyMask = 0;
+    HotkeyMask = 0;
+    LastHotkeyMask = 0;
+}
+
+
+void OpenJoystick()
+{
+    if (Joystick) SDL_JoystickClose(Joystick);
+
+    int num = SDL_NumJoysticks();
+    if (num < 1)
+    {
+        Joystick = nullptr;
+        return;
+    }
+
+    if (JoystickID >= num)
+        JoystickID = 0;
+
+    Joystick = SDL_JoystickOpen(JoystickID);
+}
+
+void CloseJoystick()
+{
+    if (Joystick)
+    {
+        SDL_JoystickClose(Joystick);
+        Joystick = nullptr;
+    }
+}
+
+
+int GetEventKeyVal(QKeyEvent* event)
+{
+    int key = event->key();
+    int mod = event->modifiers();
+    bool ismod = (key == Qt::Key_Control ||
+                  key == Qt::Key_Alt ||
+                  key == Qt::Key_AltGr ||
+                  key == Qt::Key_Shift ||
+                  key == Qt::Key_Meta);
+
+    if (!ismod)
+        key |= mod;
+    else if (Input::IsRightModKey(event))
+        key |= (1<<31);
+
+    return key;
+}
+
+void KeyPress(QKeyEvent* event)
+{
+    int keyHK = GetEventKeyVal(event);
+    int keyKP = keyHK & ~event->modifiers();
+
+    for (int i = 0; i < 12; i++)
+        if (keyKP == Config::KeyMapping[i])
+            KeyInputMask &= ~(1<<i);
+
+    for (int i = 0; i < HK_MAX; i++)
+        if (keyHK == Config::HKKeyMapping[i])
+            KeyHotkeyMask |= (1<<i);
+}
+
+void KeyRelease(QKeyEvent* event)
+{
+    int keyHK = GetEventKeyVal(event);
+    int keyKP = keyHK & ~event->modifiers();
+
+    for (int i = 0; i < 12; i++)
+        if (keyKP == Config::KeyMapping[i])
+            KeyInputMask |= (1<<i);
+
+    for (int i = 0; i < HK_MAX; i++)
+        if (keyHK == Config::HKKeyMapping[i])
+            KeyHotkeyMask &= ~(1<<i);
+}
+
+
+bool JoystickButtonDown(int val)
+{
+    if (val == -1) return false;
+
+    bool hasbtn = ((val & 0xFFFF) != 0xFFFF);
+
+    if (hasbtn)
+    {
+        if (val & 0x100)
+        {
+            int hatnum = (val >> 4) & 0xF;
+            int hatdir = val & 0xF;
+            Uint8 hatval = SDL_JoystickGetHat(Joystick, hatnum);
+
+            bool pressed = false;
+            if      (hatdir == 0x1) pressed = (hatval & SDL_HAT_UP);
+            else if (hatdir == 0x4) pressed = (hatval & SDL_HAT_DOWN);
+            else if (hatdir == 0x2) pressed = (hatval & SDL_HAT_RIGHT);
+            else if (hatdir == 0x8) pressed = (hatval & SDL_HAT_LEFT);
+
+            if (pressed) return true;
+        }
+        else
+        {
+            int btnnum = val & 0xFFFF;
+            Uint8 btnval = SDL_JoystickGetButton(Joystick, btnnum);
+
+            if (btnval) return true;
+        }
+    }
+
+    if (val & 0x10000)
+    {
+        int axisnum = (val >> 24) & 0xF;
+        int axisdir = (val >> 20) & 0xF;
+        Sint16 axisval = SDL_JoystickGetAxis(Joystick, axisnum);
+
+        switch (axisdir)
+        {
+        case 0: // positive
+            if (axisval > 16384) return true;
+            break;
+
+        case 1: // negative
+            if (axisval < -16384) return true;
+            break;
+
+        case 2: // trigger
+            if (axisval > 0) return true;
+            break;
+        }
+    }
+
+    return false;
+}
+
+void Process()
+{
+    SDL_JoystickUpdate();
+
+    if (Joystick)
+    {
+        if (!SDL_JoystickGetAttached(Joystick))
+        {
+            SDL_JoystickClose(Joystick);
+            Joystick = NULL;
+        }
+    }
+    if (!Joystick && (SDL_NumJoysticks() > 0))
+    {
+        JoystickID = Config::JoystickID;
+        OpenJoystick();
+    }
+
+    JoyInputMask = 0xFFF;
+    for (int i = 0; i < 12; i++)
+        if (JoystickButtonDown(Config::JoyMapping[i]))
+            JoyInputMask &= ~(1<<i);
+
+    InputMask = KeyInputMask & JoyInputMask;
+
+    JoyHotkeyMask = 0;
+    for (int i = 0; i < HK_MAX; i++)
+        if (JoystickButtonDown(Config::HKJoyMapping[i]))
+            JoyHotkeyMask |= (1<<i);
+
+    HotkeyMask = KeyHotkeyMask | JoyHotkeyMask;
+    HotkeyPress = HotkeyMask & ~LastHotkeyMask;
+    HotkeyRelease = LastHotkeyMask & ~HotkeyMask;
+    LastHotkeyMask = HotkeyMask;
+}
+
+
+bool HotkeyDown(int id)     { return HotkeyMask    & (1<<id); }
+bool HotkeyPressed(int id)  { return HotkeyPress   & (1<<id); }
+bool HotkeyReleased(int id) { return HotkeyRelease & (1<<id); }
+
+
+// TODO: MacOS version of this!
+// distinguish between left and right modifier keys (Ctrl, Alt, Shift)
+// Qt provides no real cross-platform way to do this, so here we go
+// for Windows and Linux we can distinguish via scancodes (but both
+// provide different scancodes)
+#ifdef __WIN32__
+bool IsRightModKey(QKeyEvent* event)
+{
+    quint32 scan = event->nativeScanCode();
+    return (scan == 0x11D || scan == 0x138 || scan == 0x36);
+}
+#else
+bool IsRightModKey(QKeyEvent* event)
+{
+    quint32 scan = event->nativeScanCode();
+    return (scan == 0x69 || scan == 0x6C || scan == 0x3E);
+}
+#endif
+
+}