谁能帮我看看这段程序是什么意思啊
#include <stdlib.h>
#include <string.h>
#include "BUTTON.h"
#include "WIDGET.h"
#include "GUIDebug.h"
#include "GUI.h"
#include "GUI_Protected.h"
#if GUI_WINSUPPORT
/*********************************************************************
*
* Private config defaults
*
**********************************************************************
*/
/* Define default fonts */
#ifndef BUTTON_FONT_DEFAULT
#define BUTTON_FONT_DEFAULT &GUI_Font13_1
#endif
/* Support for 3D effects */
#ifndef BUTTON_USE_3D
#define BUTTON_USE_3D 1
#endif
#ifndef BUTTON_3D_MOVE_X
#define BUTTON_3D_MOVE_X 1
#endif
#ifndef BUTTON_3D_MOVE_Y
#define BUTTON_3D_MOVE_Y 1
#endif
/* Define colors */
#ifndef BUTTON_BKCOLOR0_DEFAULT
#define BUTTON_BKCOLOR0_DEFAULT 0xAAAAAA
#endif
#ifndef BUTTON_BKCOLOR1_DEFAULT
#define BUTTON_BKCOLOR1_DEFAULT GUI_WHITE
#endif
#ifndef BUTTON_TEXTCOLOR0_DEFAULT
#define BUTTON_TEXTCOLOR0_DEFAULT GUI_BLACK
#endif
#ifndef BUTTON_TEXTCOLOR1_DEFAULT
#define BUTTON_TEXTCOLOR1_DEFAULT GUI_BLACK
#endif
/*********************************************************************
*
* Object definition
*
**********************************************************************
*/
typedef struct {
WIDGET Widget;
GUI_COLOR aBkColor[2];
GUI_COLOR aTextColor[2];
const GUI_FONT* pFont;
const GUI_BITMAP* apBitmap[2];
WM_HMEM hpText;
#if BUTTON_SUPPORT_STREAMED_BITMAP
U8 aBitmapIsStreamed[2];
#endif
#if BUTTON_SUPPORT_BITMAP_OFFSET /* Support for bitmap offsets */
I16 xOffBitmap[2], yOffBitmap[2];
#endif
#ifdef _DEBUG
int DebugId;
#endif
} BUTTON_Obj;
/*********************************************************************
*
* Static data
*
**********************************************************************
*/
/* None */
/*********************************************************************
*
* Macros for internal use
*
**********************************************************************
*/
#define BUTTON_ID 0x42555454
#define BUTTON_H2P(h) (BUTTON_Obj*) WM_HMEM2Ptr(h)
#ifdef _DEBUG
#define BUTTON_ASSERT_IS_VALID_PTR(p) GUI_DEBUG_ERROROUT_IF(p->DebugId != BUTTON_ID, "BUTTON.C: Wrong handle type or object not init'ed")
#define BUTTON_INIT_ID(p) p->DebugId = BUTTON_ID
#define BUTTON_DEINIT_ID(p) p->DebugId = BUTTON_ID+1
#else
#define BUTTON_ASSERT_IS_VALID_PTR(p)
#define BUTTON_INIT_ID(p)
#define BUTTON_DEINIT_ID(p)
#endif
/*********************************************************************
*
* Static routines
*
**********************************************************************
*/
/*********************************************************************
*
* _Paint
*/
static void _Paint(BUTTON_Obj* pObj) {
const char*s =NULL;
int State = pObj->Widget.State;
int PressedState = (State & BUTTON_STATE_PRESSED) ? 1:0;
GUI_RECT rClient;
GUI_RECT r;
GUI_SetFont(pObj->pFont);
GUI_DEBUG_LOG("BUTTON: Paint(..)\n");
if (pObj->hpText) {
s = (const char*) WM_HMEM2Ptr(pObj->hpText);
}
GUI_GetClientRect(&rClient);
r = rClient;
/* Draw background */
GUI_SetBkColor (pObj->aBkColor[PressedState]);
GUI_SetColor (pObj->aTextColor[PressedState]);
GUI_Clear();
/* Draw bitmap.
If we have only one, we will use it.
If we have to we will use the second one (Index 1) for the pressed state
*/
{
int Index =0;
if (pObj->apBitmap[1] && PressedState) {
Index =1;
}
if (pObj->apBitmap[Index]) {
#if BUTTON_SUPPORT_STREAMED_BITMAP
if(pObj->aBitmapIsStreamed[Index]) {
#if BUTTON_SUPPORT_BITMAP_OFFSET
GUI_DrawStreamedBitmap((const GUI_BITMAP_STREAM*)(pObj->apBitmap[Index]), pObj->xOffBitmap, pObj->yOffBitmap);
#else
GUI_DrawBitmapStreamed((const GUI_BITMAP_STREAM*)(pObj->apBitmap[Index]), 0,0);
#endif
} else
#endif
{
#if BUTTON_SUPPORT_BITMAP_OFFSET
GUI_DrawBitmap(pObj->apBitmap[Index], pObj->xOffBitmap[Index], pObj->yOffBitmap[Index]);
#else
GUI_DrawBitmap(pObj->apBitmap[Index], 0,0);
#endif
}
}
}
/* Draw the actual button (background and text) */
#if BUTTON_USE_3D
if (pObj->Widget.State & BUTTON_STATE_PRESSED) {
GUI_MoveRect(&r, BUTTON_3D_MOVE_X,BUTTON_3D_MOVE_Y);
}
#endif
GUI_SetTextMode(GUI_TM_TRANS);
GUI_DispStringInRect(s, &r, GUI_TA_HCENTER | GUI_TA_VCENTER);
/* Draw the 3D effect (if configured) */
#if BUTTON_USE_3D
if ((State & BUTTON_STATE_PRESSED) == 0) {
WIDGET_EFFECT_3D_DrawUp();
} else {
GUI_SetColor(0x000000); /// TBD: Use halftone
GUI_DrawRect(rClient.y0, rClient.x0, rClient.x1, rClient.y1);
}
#endif
/* Draw focus */
if (State & BUTTON_STATE_FOCUS) {
GUI_SetColor(GUI_BLACK);
GUI_DrawFocusRect(&rClient, 2);
}
}
/*********************************************************************
*
* _Delete
*
* Delete attached objects (if any)
*/
static void _Delete(BUTTON_Obj* pObj) {
WM_FREEPTR(&pObj->hpText);
}
/*********************************************************************
*
* _OnTouch
*/
static void _OnTouch(BUTTON_Handle hObj, BUTTON_Obj* pObj, WM_MESSAGE*pMsg) {
int Notification;
int Hit = 0;
GUI_TOUCH_tState* pState = (GUI_TOUCH_tState*)pMsg->Data.p;
if (pMsg->Data.p) { /* Something happened in our area (pressed or released) */
if (pState->Pressed) {
WIDGET_OrState(hObj, BUTTON_STATE_PRESSED);
Notification = WM_NOTIFICATION_CLICKED;
WM_SetFocus(hObj);
} else {
Hit =1;
Notification = WM_NOTIFICATION_RELEASED;
WIDGET_AndState(hObj, BUTTON_STATE_PRESSED);
}
} else {
Notification = WM_NOTIFICATION_MOVED_OUT;
WIDGET_AndState(hObj, BUTTON_STATE_PRESSED);
}
WM_NotifyParent(hObj, Notification);
if (Hit == 1) {
GUI_DEBUG_LOG("BUTTON: Hit\n");
GUI_StoreKey(pObj->Widget.Id);
}
}
/*********************************************************************
*
* Callback
*/
static void _BUTTON_Callback(WM_MESSAGE *pMsg) {
BUTTON_Handle hObj = pMsg->hWin;
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
/* Let widget handle the standard messages */
if (WIDGET_HandleActive(hObj, pMsg) == 0) {
return;
}
switch (pMsg->MsgId) {
case WM_TOUCH:
_OnTouch(hObj, pObj, pMsg);
break;
case WM_PAINT:
GUI_DEBUG_LOG("BUTTON: _BUTTON_Callback(WM_PAINT)\n");
_Paint(pObj);
return;
case WM_DELETE:
GUI_DEBUG_LOG("BUTTON: _BUTTON_Callback(WM_DELETE)\n");
_Delete(pObj);
break; /* No return here ... WM_DefaultProc needs to be called */
}
WM_DefaultProc(pMsg);
}
/*********************************************************************
*
* Exported routines: Create
*
**********************************************************************
*/
BUTTON_Handle BUTTON_CreateAsChild (int x0, int y0, int xsize, int ysize, WM_HWIN hParent, int Id, int Flags) {
BUTTON_Handle hObj;
/* Create the window */
WM_LOCK();
hObj = WM_CreateWindowAsChild(x0, y0, xsize, ysize, hParent,
Flags, _BUTTON_Callback,
sizeof(BUTTON_Obj)-sizeof(WM_Obj));
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
/* init widget specific variables */
/* init member variables */
BUTTON_INIT_ID(pObj);
pObj->Widget.Id = Id;
pObj->pFont = BUTTON_FONT_DEFAULT;
pObj->aBkColor[0] = BUTTON_BKCOLOR0_DEFAULT;
pObj->aBkColor[1] = BUTTON_BKCOLOR1_DEFAULT;
pObj->aTextColor[0] = BUTTON_TEXTCOLOR0_DEFAULT;
pObj->aTextColor[1] = BUTTON_TEXTCOLOR1_DEFAULT;
pObj->Widget.State = BUTTON_STATE_INACTIVE;
} else {
GUI_DEBUG_ERROROUT_IF(hObj==0, "BUTTON_Create failed")
}
WM_UNLOCK();
return hObj;
}
BUTTON_Handle BUTTON_Create ( int x0, int y0, int xsize, int ysize, int Id, int Flags) {
return BUTTON_CreateAsChild(x0, y0, xsize, ysize, WM_HMEM_NULL, Id, Flags);
}
BUTTON_Handle BUTTON_CreateIndirect(const GUI_WIDGET_CREATE_INFO* pCreateInfo, WM_HWIN hWinParent, int x0, int y0, WM_CALLBACK* cb) {
BUTTON_Handle hThis;
GUI_USE_PARA(cb);
hThis = BUTTON_CreateAsChild(
pCreateInfo->x0 + x0, pCreateInfo->y0 + y0, pCreateInfo->xSize, pCreateInfo->ySize,
hWinParent, pCreateInfo->Id, pCreateInfo->Flags);
BUTTON_SetText(hThis, pCreateInfo->pName);
return hThis;
}
/*********************************************************************
*
* Exported routines: Various methods
*
**********************************************************************
*/
void BUTTON_SetText(BUTTON_Handle hObj, const char* s) {
WM_LOCK();
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
BUTTON_ASSERT_IS_VALID_PTR(pObj);
WM_FREEPTR(&pObj->hpText);
{
WM_HMEM hMem = WM_ALLOC(strlen(s)+1);
if (hMem) {
strcpy((char *) WM_HMEM2Ptr(hMem), s);
}
pObj->hpText = hMem;
}
BUTTON_Invalidate(hObj);
} else {
GUI_DEBUG_WARN("BUTTON_SetText: Invalid handle");
}
WM_UNLOCK();
}
void BUTTON_SetFont(BUTTON_Handle hObj, const GUI_FONT* pfont) {
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
BUTTON_ASSERT_IS_VALID_PTR(pObj);
pObj->pFont = pfont;
BUTTON_Invalidate(hObj);
} else {
GUI_DEBUG_WARN("BUTTON_SetFont: Invalid handle");
}
}
void BUTTON_SetBkColor(BUTTON_Handle hObj, int Index, GUI_COLOR color) {
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
BUTTON_ASSERT_IS_VALID_PTR(pObj);
pObj->aBkColor[Index] = color;
BUTTON_Invalidate(hObj);
} else {
GUI_DEBUG_WARN("BUTTON_SetBkColor: Invalid handle");
}
}
void BUTTON_SetTextColor(BUTTON_Handle hObj, int Index, GUI_COLOR color) {
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
BUTTON_ASSERT_IS_VALID_PTR(pObj);
pObj->aTextColor[Index] = color;
BUTTON_Invalidate(hObj);
} else {
GUI_DEBUG_WARN("BUTTON_SetTextColor: Invalid handle");
}
}
void BUTTON_SetState(BUTTON_Handle hObj, int State) {
WIDGET_SetState(hObj, State);
}
#if BUTTON_SUPPORT_BITMAP_OFFSET
void BUTTON_SetBitmapEx(BUTTON_Handle hObj, int Index, const GUI_BITMAP* pBitmap, int x, int y) {
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
BUTTON_ASSERT_IS_VALID_PTR(pObj);
if ((unsigned int)Index > GUI_COUNTOF(pObj->apBitmap))
return;
pObj->apBitmap[Index] = pBitmap;
pObj->xOffBitmap[Index] = x;
pObj->yOffBitmap[Index] = y;
BUTTON_Invalidate(hObj);
}
}
#endif
void BUTTON_SetBitmap(BUTTON_Handle hObj, int Index, const GUI_BITMAP* pBitmap) {
#if BUTTON_SUPPORT_BITMAP_OFFSET
BUTTON_SetBitmapEx(hObj, Index, pBitmap, 0,0);
#else
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
BUTTON_ASSERT_IS_VALID_PTR(pObj);
if ((unsigned int)Index > GUI_COUNTOF(pObj->apBitmap))
return;
pObj->apBitmap[Index] = pBitmap;
BUTTON_Invalidate(hObj);
}
#endif
}
#if BUTTON_SUPPORT_STREAMED_BITMAP
void BUTTON_SetStreamedBitmap(BUTTON_Handle hObj, int Index, const GUI_BITMAP_STREAM* pBitmap) {
if (hObj) {
BUTTON_Obj* pObj = BUTTON_H2P(hObj);
BUTTON_ASSERT_IS_VALID_PTR(pObj);
if ((unsigned int)Index > GUI_COUNTOF(pObj->apBitmap))
return;
pObj->apBitmap[Index] = (const GUI_BITMAP*)pBitmap;
pObj->aBitmapIsStreamed[Index] = 1;
BUTTON_Invalidate(hObj);
}
}
#endif
#else /* Avoid problems with empty object modules */
void BUTTON_C(void) {}
#endif /* GUI_WINSUPPORT */
