我需要帮助。我为黑莓手册制作游戏，但我在多点触控事件处理方面遇到麻烦。我使用从示例中获取的CInput类来处理触摸事件，它工作（所有触摸都有正确的坐标和触摸计数也正确）但是当同时触摸和释放触摸时CInput不释放1个事件并且所有出错都像我不发布触摸。我可以在模拟器或剧本中看到这个bug。这部分代码用于触摸工作。我怎么解决它？谢谢有人可以提供帮助。抱歉英文不好
void touchUpdate()
{
g_Input.Update();
printf("count %d\n", g_Input.getTouchCount());
if (g_Input.getTouchCount() != 0)
{
CTouch* touch;
if (g_Input.isMultiTouch())
{
for (int i = 0; i < g_Input.getTouchCount(); i++)
{
touch = g_Input.getTouch(i);
if (touch != NULL)
{
if (!touch->active)
{
touch->x = -1;
touch->y = -1;
continue;
}
else if (checkButton(&btnAction, touch))
{
if (menu->isGameEnabled())
{
currentGame->eventAction();
}
else
{
currentGame = menu->eventAction();
}
continue;
}
else if (checkButton(&btnUp, touch))
{
if (menu->isGameEnabled())
{
currentGame->eventUp();
}
else
{
menu->eventUp();
}
continue;
}
else if (checkButton(&btnDown, touch))
{
if (menu->isGameEnabled())
{
currentGame->eventDown();
}
else
{
menu->eventDown();
}
continue;
}
else if (checkButton(&btnLeft, touch))
{
if (menu->isGameEnabled())
{
currentGame->eventLeft();
}
else
{
menu->eventLeft();
}
continue;
}
else if (checkButton(&btnRight, touch))
{
if (menu->isGameEnabled())
{
currentGame->eventRight();
}
else
{
menu->eventRight();
}
continue;
}
else if (checkButton(&btnPause, touch))
{
if (menu->isGameEnabled())
{
currentGame->eventPause();
}
continue;
}
else if (checkButton(&btnSound, touch))
{
// off/on sound
continue;
}
else if (checkButton(&btnMenu, touch))
{
// force drop to menu
if (menu->isGameEnabled())
{
currentGame->eventMenu();
}
continue;
}
}
}
}
}
}
currentGame-＆gt; eventMenu（），currentGame-＆gt; eventUp（）等...它只是在游戏逻辑或主菜单中起作用。按下按钮时，此功能必须始终调用。
struct roundButton
{
int x, y;
int radius;
bool pressed;
};
bool checkButton(roundButton *button, CTouch *touch)
{
if ((button->x - touch->x) * (button->x - touch->x) + (button->y - touch->y) * (button->y - touch->y) <= button->radius * button->radius)
{
button->pressed = true;
return true;
}
return false;
}
这是我按下或不按下按钮的方式
#ifndef SRC_INPUT_H_
#define SRC_INPUT_H_
#include "IwGeom.h"
#include "s3ePointer.h"
#define MAX_TOUCHES 2
struct CTouch
{
public:
int x, y;
bool active;
int id;
};
class CInput
{
private:
bool Available; // true if a pointer is present
bool IsMultiTouch; // true if multitouch is enabled
CTouch Touches[MAX_TOUCHES]; // List of potential touches
public:
bool isAvailable() const { return Available; } // Returns availability of the pointer
bool isMultiTouch() const { return IsMultiTouch; } // Returns multitouch capability
CTouch* getTouchByID(int id); // returns the touch identified by its id
CTouch* getTouch(int index) { return &Touches[index]; } // Gets a specific touch
CTouch* findTouch(int id); // Finds a specific touch by its id
int getTouchCount() const; // Get number of touches this frame
public:
bool Init(); // Initialises the input system (returns true if pointer is supported)
void Release(); // Releases data used by the input system
void Update(); // Updates the input system, called every frame
};
extern CInput g_Input;
#endif // SRC_INPUT_H_
CInput类
#include "input.h"
CInput g_Input;
void HandleMultiTouchButtonCB(s3ePointerTouchEvent* event)
{
CTouch* touch = g_Input.findTouch(event->m_TouchID);
if (touch != NULL)
{
touch->active = event->m_Pressed != 0;
touch->x = event->m_x;
touch->y = event->m_y;
}
}
void HandleMultiTouchMotionCB(s3ePointerTouchMotionEvent* event)
{
CTouch* touch = g_Input.findTouch(event->m_TouchID);
if (touch != NULL)
{
touch->x = event->m_x;
touch->y = event->m_y;
}
}
void HandleSingleTouchButtonCB(s3ePointerEvent* event)
{
CTouch* touch = g_Input.getTouch(0);
touch->active = event->m_Pressed != 0;
touch->x = event->m_x;
touch->y = event->m_y;
}
void HandleSingleTouchMotionCB(s3ePointerMotionEvent* event)
{
CTouch* touch = g_Input.getTouch(0);
touch->x = event->m_x;
touch->y = event->m_y;
}
CTouch* CInput::findTouch(int id)
{
if (!Available)
return NULL;
for (int t = 0; t < MAX_TOUCHES; t++)
{
if (Touches[t].id == id)
return &Touches[t];
if (!Touches[t].active)
{
Touches[t].id = id;
return &Touches[t];
}
}
return NULL;
}
CTouch* CInput::getTouchByID(int id)
{
for (int t = 0; t < MAX_TOUCHES; t++)
{
if (Touches[t].active && Touches[t].id == id)
return &Touches[t];
}
return NULL;
}
int CInput::getTouchCount() const
{
if (!Available)
return 0;
int count = 0;
for (int t = 0; t < MAX_TOUCHES; t++)
{
if (Touches[t].active)
count++;
}
return count;
}
bool CInput::Init()
{
Available = s3ePointerGetInt(S3E_POINTER_AVAILABLE) ? true : false;
if (!Available)
return false;
for (int t = 0; t < MAX_TOUCHES; t++)
{
Touches[t].active = false;
Touches[t].id = 0;
}
IsMultiTouch = s3ePointerGetInt(S3E_POINTER_MULTI_TOUCH_AVAILABLE) ? true : false;
if (IsMultiTouch)
{
s3ePointerRegister(S3E_POINTER_TOUCH_EVENT, (s3eCallback)HandleMultiTouchButtonCB, NULL);
s3ePointerRegister(S3E_POINTER_TOUCH_MOTION_EVENT, (s3eCallback)HandleMultiTouchMotionCB, NULL);
}
else
{
s3ePointerRegister(S3E_POINTER_BUTTON_EVENT, (s3eCallback)HandleSingleTouchButtonCB, NULL);
s3ePointerRegister(S3E_POINTER_MOTION_EVENT, (s3eCallback)HandleSingleTouchMotionCB, NULL);
}
return true;
}
void CInput::Release()
{
if (Available)
{
if (IsMultiTouch)
{
s3ePointerUnRegister(S3E_POINTER_TOUCH_EVENT, (s3eCallback)HandleMultiTouchButtonCB);
s3ePointerUnRegister(S3E_POINTER_TOUCH_MOTION_EVENT, (s3eCallback)HandleMultiTouchMotionCB);
}
else
{
s3ePointerUnRegister(S3E_POINTER_BUTTON_EVENT, (s3eCallback)HandleSingleTouchButtonCB);
s3ePointerUnRegister(S3E_POINTER_MOTION_EVENT, (s3eCallback)HandleSingleTouchMotionCB);
}
}
}
void CInput::Update()
{
if (Available)
s3ePointerUpdate();
}
答案 0 :(得分：0)
我发现了这个错误。函数findTouch甚至可以返回不活动的触摸。所以修复看起来像
CTouch* CInput::findTouch(int id)
{
if (!Available)
return NULL;
for (int t = 0; t < MAX_TOUCHES; t++)
{
if (Touches[t].id == id)
return &Touches[t];
}
for (int t = 0; t < MAX_TOUCHES; t++)
{
if (!Touches[t].active)
{
Touches[t].id = id;
return &Touches[t];
}
}
return NULL;
}