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#include "stdafx.h"
#ifdef _WINDOWS64
#include "KeyboardMouseInput.h"
KeyboardMouseInput KMInput;
KeyboardMouseInput::KeyboardMouseInput()
: m_mouseDeltaX(0.0f)
, m_mouseDeltaY(0.0f)
, m_mouseDeltaXAccum(0.0f)
, m_mouseDeltaYAccum(0.0f)
, m_scrollDelta(0)
, m_scrollDeltaAccum(0)
, m_captured(false)
, m_hWnd(NULL)
, m_initialized(false)
{
memset(m_keyState, 0, sizeof(m_keyState));
memset(m_keyStatePrev, 0, sizeof(m_keyStatePrev));
memset(m_mouseButtons, 0, sizeof(m_mouseButtons));
memset(m_mouseButtonsPrev, 0, sizeof(m_mouseButtonsPrev));
}
KeyboardMouseInput::~KeyboardMouseInput()
{
if (m_captured)
{
SetCapture(false);
}
}
void KeyboardMouseInput::Init(HWND hWnd)
{
m_hWnd = hWnd;
m_initialized = true;
// Register for raw mouse input
RAWINPUTDEVICE rid;
rid.usUsagePage = HID_USAGE_PAGE_GENERIC;
rid.usUsage = HID_USAGE_GENERIC_MOUSE;
rid.dwFlags = 0;
rid.hwndTarget = hWnd;
RegisterRawInputDevices(&rid, 1, sizeof(rid));
}
void KeyboardMouseInput::Tick()
{
// Snapshot accumulated mouse deltas
m_mouseDeltaX = m_mouseDeltaXAccum;
m_mouseDeltaY = m_mouseDeltaYAccum;
m_mouseDeltaXAccum = 0.0f;
m_mouseDeltaYAccum = 0.0f;
// Snapshot scroll delta
m_scrollDelta = m_scrollDeltaAccum;
m_scrollDeltaAccum = 0;
// Keep cursor pinned to center while captured
if (m_captured)
CenterCursor();
}
void KeyboardMouseInput::EndFrame()
{
// Advance previous state for next frame's edge detection.
// Must be called AFTER all consumers have read IsKeyPressed/Released etc.
memcpy(m_keyStatePrev, m_keyState, sizeof(m_keyState));
memcpy(m_mouseButtonsPrev, m_mouseButtons, sizeof(m_mouseButtons));
}
void KeyboardMouseInput::OnKeyDown(WPARAM vk)
{
if (vk < 256)
{
m_keyState[vk] = true;
}
}
void KeyboardMouseInput::OnKeyUp(WPARAM vk)
{
if (vk < 256)
{
m_keyState[vk] = false;
}
}
void KeyboardMouseInput::OnRawMouseInput(LPARAM lParam)
{
if (!m_captured) return;
UINT dwSize = 0;
GetRawInputData((HRAWINPUT)lParam, RID_INPUT, NULL, &dwSize, sizeof(RAWINPUTHEADER));
BYTE* lpb = (BYTE*)alloca(dwSize);
if (GetRawInputData((HRAWINPUT)lParam, RID_INPUT, lpb, &dwSize, sizeof(RAWINPUTHEADER)) != dwSize)
return;
RAWINPUT* raw = (RAWINPUT*)lpb;
if (raw->header.dwType == RIM_TYPEMOUSE)
{
if (raw->data.mouse.usFlags == MOUSE_MOVE_RELATIVE)
{
m_mouseDeltaXAccum += (float)raw->data.mouse.lLastX;
m_mouseDeltaYAccum += (float)raw->data.mouse.lLastY;
}
}
}
void KeyboardMouseInput::OnMouseButton(int button, bool down)
{
if (button >= 0 && button < 3)
{
m_mouseButtons[button] = down;
}
}
void KeyboardMouseInput::OnMouseWheel(int delta)
{
m_scrollDeltaAccum += delta;
}
void KeyboardMouseInput::ClearAllState()
{
memset(m_keyState, 0, sizeof(m_keyState));
memset(m_mouseButtons, 0, sizeof(m_mouseButtons));
m_mouseDeltaXAccum = 0.0f;
m_mouseDeltaYAccum = 0.0f;
m_scrollDeltaAccum = 0;
}
// Key queries
bool KeyboardMouseInput::IsKeyDown(int vk) const
{
if (vk < 0 || vk >= 256) return false;
return m_keyState[vk];
}
bool KeyboardMouseInput::IsKeyPressed(int vk) const
{
if (vk < 0 || vk >= 256) return false;
return m_keyState[vk] && !m_keyStatePrev[vk];
}
bool KeyboardMouseInput::IsKeyReleased(int vk) const
{
if (vk < 0 || vk >= 256) return false;
return !m_keyState[vk] && m_keyStatePrev[vk];
}
// Mouse button queries
bool KeyboardMouseInput::IsMouseDown(int btn) const
{
if (btn < 0 || btn >= 3) return false;
return m_mouseButtons[btn];
}
bool KeyboardMouseInput::IsMousePressed(int btn) const
{
if (btn < 0 || btn >= 3) return false;
return m_mouseButtons[btn] && !m_mouseButtonsPrev[btn];
}
bool KeyboardMouseInput::IsMouseReleased(int btn) const
{
if (btn < 0 || btn >= 3) return false;
return !m_mouseButtons[btn] && m_mouseButtonsPrev[btn];
}
// Delta queries
float KeyboardMouseInput::GetMouseDeltaX() const { return m_mouseDeltaX; }
float KeyboardMouseInput::GetMouseDeltaY() const { return m_mouseDeltaY; }
int KeyboardMouseInput::GetScrollDelta() const { return m_scrollDelta; }
// Mouse capture
void KeyboardMouseInput::SetCapture(bool capture)
{
if (capture == m_captured) return;
m_captured = capture;
if (capture)
{
ShowCursor(FALSE);
RECT rect;
GetClientRect(m_hWnd, &rect);
POINT topLeft = { rect.left, rect.top };
POINT bottomRight = { rect.right, rect.bottom };
ClientToScreen(m_hWnd, &topLeft);
ClientToScreen(m_hWnd, &bottomRight);
RECT screenRect = { topLeft.x, topLeft.y, bottomRight.x, bottomRight.y };
ClipCursor(&screenRect);
CenterCursor();
// Flush accumulated deltas so the snap-to-center doesn't cause a jump
m_mouseDeltaXAccum = 0.0f;
m_mouseDeltaYAccum = 0.0f;
}
else
{
ShowCursor(TRUE);
ClipCursor(NULL);
}
}
bool KeyboardMouseInput::IsCaptured() const { return m_captured; }
void KeyboardMouseInput::CenterCursor()
{
RECT rect;
GetClientRect(m_hWnd, &rect);
POINT center = { (rect.left + rect.right) / 2, (rect.top + rect.bottom) / 2 };
ClientToScreen(m_hWnd, ¢er);
SetCursorPos(center.x, center.y);
}
#endif // _WINDOWS64
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