#include "keyboardevent.h"


HHOOK KeyboardEvent::keyHook= nullptr;


//键盘钩子过程
LRESULT CALLBACK KeyboardEvent::keyProc(int nCode,WPARAM wParam,LPARAM lParam )
{
    //在WH_KEYBOARD_LL模式下lParam 是指向KBDLLHOOKSTRUCT类型地址
    KBDLLHOOKSTRUCT *pkbhs = (KBDLLHOOKSTRUCT *) lParam;
    //如果nCode等于HC_ACTION则处理该消息，如果小于0，则钩子子程就必须将该消息传递给 CallNextHookEx
    if(nCode == HC_ACTION)
    {
//        if(KBCallBack != nullptr){
//            KBCallBack(pkbhs->vkCode, pkbhs->flags);
//        }else{
//            KeyboardEvent::getInstance().UnhookSetKeyboardHookEx();
//        }
        KeyboardEvent::getInstance().SendKeyboardSignal(pkbhs->vkCode, pkbhs->flags);

        if(pkbhs->vkCode == VK_ESCAPE && GetAsyncKeyState(VK_CONTROL)& 0x8000 && GetAsyncKeyState(VK_SHIFT)&0x8000)//"Ctrl+Shift+Esc"
        {
            return 1;
        }
        else if(pkbhs->vkCode == VK_ESCAPE && GetAsyncKeyState(VK_CONTROL) & 0x8000)//"Ctrl+Esc"
        {
            return 1;
        }
        else if(pkbhs->vkCode == VK_TAB && pkbhs->flags & LLKHF_ALTDOWN )//"Alt+Tab"
        {
            return 1;
        }
        else if(pkbhs->vkCode == VK_ESCAPE && pkbhs->flags &LLKHF_ALTDOWN )//"Alt+Esc"
        {
            return 1;
        }
        else if(pkbhs->vkCode == VK_F4 && pkbhs->flags & LLKHF_ALTDOWN)//"Alt+F4"
        {
            return 1;
        }
        else if(wParam == WM_KEYDOWN && pkbhs->vkCode == VK_SNAPSHOT)//"Prtic"
        {
            //MainWindow::getInstance()->keyPressedDisplay(MainWindow::getInstance()->ui->label_prtsc);
            return 1;
        }
        else if(wParam == WM_KEYUP && pkbhs->vkCode == VK_SNAPSHOT)
        {
            //MainWindow::getInstance()->keyReleasedDisplay(MainWindow::getInstance()->ui->label_prtsc);
            return 1;
        }
        else if(wParam == WM_KEYDOWN && pkbhs->vkCode == VK_LWIN)// "LeftWin"
        {
            //MainWindow::getInstance()->keyPressedDisplay(MainWindow::getInstance()->ui->label_winl);
            return 1;
        }
        else if(wParam == WM_KEYUP && pkbhs->vkCode == VK_LWIN)
        {
            //MainWindow::getInstance()->keyReleasedDisplay(MainWindow::getInstance()->ui->label_winl);
            return 1;
        }
        else if(wParam == WM_KEYDOWN && pkbhs->vkCode == VK_RWIN)//"RightWin"
        {
            //MainWindow::getInstance()->keyPressedDisplay(MainWindow::getInstance()->ui->label_winr);
            return 1;
        }
        else if(wParam == WM_KEYUP && pkbhs->vkCode == VK_RWIN)
        {
            //MainWindow::getInstance()->keyReleasedDisplay(MainWindow::getInstance()->ui->label_winr);
            return 1;
        }
        else if(wParam == WM_KEYDOWN && pkbhs->vkCode == VK_TAB)//"TAB"
        {
            //MainWindow::getInstance()->keyPressedDisplay(MainWindow::getInstance()->ui->label_tab);
            return 1;
        }
        else if(wParam == WM_KEYUP && pkbhs->vkCode == VK_TAB)
        {
            //MainWindow::getInstance()->keyReleasedDisplay(MainWindow::getInstance()->ui->label_tab);
            return 1;
        }
    }
    return CallNextHookEx(keyHook, nCode, wParam, lParam);
}


void KeyboardEvent::SetKeyboardHookEx( ){

    if(keyHook == nullptr){

        //注册钩子
        keyHook = SetWindowsHookEx(WH_KEYBOARD_LL,keyProc,GetModuleHandle(nullptr),0);
    }else{
        UnhookSetKeyboardHookEx();
        //注册钩子
        keyHook = SetWindowsHookEx(WH_KEYBOARD_LL,keyProc,GetModuleHandle(nullptr),0);
    }
}

void KeyboardEvent::UnhookSetKeyboardHookEx(){
    UnhookWindowsHookEx(keyHook);
    keyHook= nullptr;
}

void KeyboardEvent::SendKeyboardSignal( int vkCode, int val){
    emit KeyboardSignalVal(vkCode, val);
}