/***********************************************************************************************************                                                uC/GUI*                        Universal graphic software for embedded applications**                       (c) Copyright 2002, Micrium Inc., Weston, FL*                       (c) Copyright 2002, SEGGER Microcontroller Systeme GmbH**              礐/GUI is protected by international copyright laws. Knowledge of the*              source code may not be used to write a similar product. This file may*              only be used in accordance with a license and should not be redistributed*              in any way. We appreciate your understanding and fairness.*----------------------------------------------------------------------File        : SCROLLBAR.cPurpose     : SCROLLBAR for new emWin GSC widgets---------------------------END-OF-HEADER------------------------------*/#include <stdlib.h>#include <string.h>#include "GUI_Private.H"#include "SCROLLBAR.h"#include "Widget.h"#if GUI_WINSUPPORT/***********************************************************************       Private config defaults************************************************************************//* Support for 3D effects */#ifndef SCROLLBAR_USE_3D  #define SCROLLBAR_USE_3D 1#endif/* Define colors */#ifndef SCROLLBAR_BKCOLOR0_DEFAULT  #define SCROLLBAR_BKCOLOR0_DEFAULT 0x808080#endif#ifndef SCROLLBAR_BKCOLOR1_DEFAULT  #define SCROLLBAR_BKCOLOR1_DEFAULT GUI_BLACK#endif#ifndef SCROLLBAR_COLOR0_DEFAULT  #define SCROLLBAR_COLOR0_DEFAULT 0xc0c0c0#endif#ifndef SCROLLBAR_COLOR1_DEFAULT  #define SCROLLBAR_COLOR1_DEFAULT GUI_BLACK#endif/***********************************************************************       Object definition************************************************************************/typedef struct {  WIDGET Widget;  GUI_COLOR aBkColor[2];  GUI_COLOR aColor[2];  int NumItems, v, PageSize;  #if GUI_DEBUG_LEVEL >1    int DebugId;  #endif  } SCROLLBAR_Obj;typedef struct {  int x1_LeftArrow;  int x0_Thumb;  int x1_Thumb;  int x0_RightArrow;  int xSizeMoveable;  int ThumbSize;} POSITIONS;/***********************************************************************       Static data************************************************************************/I16 _DefaultWidth = 11;/***********************************************************************       Macros for internal use************************************************************************/#define SCROLLBAR_ID 0x4544   /* Magic numer, should be unique if possible */#define SCROLLBAR_H2P(h) (SCROLLBAR_Obj*) WM_H2P(h)#ifdef _DEBUG  #define SCROLLBAR_ASSERT_IS_VALID_PTR(p) DEBUG_ERROROUT_IF(p->DebugId != SCROLLBAR_ID, "xxx.c: Wrong handle type or Object not init'ed")  #define SCROLLBAR_INIT_ID(p)   p->DebugId = SCROLLBAR_ID  #define SCROLLBAR_DEINIT_ID(p) p->DebugId = SCROLLBAR_ID+1#else  #define SCROLLBAR_ASSERT_IS_VALID_PTR(p)  #define SCROLLBAR_INIT_ID(p)  #define SCROLLBAR_DEINIT_ID(p)#endif/***********************************************************************       Static routines************************************************************************/static int _GetArrowSize(SCROLLBAR_Obj* pObj) {  unsigned int r;  unsigned int xSize = WIDGET__GetXSize(&pObj->Widget);  unsigned int ySize = WIDGET__GetYSize(&pObj->Widget);  r = ySize/2 + 5;  if (r > xSize-5)    r = xSize-5;  return r;}/***********************************************************************       _GetPositions  Calculates all positions required for drawing or for mouse / touch  evaluation.*/static void _GetPositions(SCROLLBAR_Obj* pObj, POSITIONS* pPos) {  int xSizeArrow, xSize, xSizeMoveable, ThumbSize, NumItems, xSizeThumbArea;  NumItems      = pObj->NumItems;  xSize         = WIDGET__GetXSize(&pObj->Widget);  xSizeArrow    = _GetArrowSize(pObj);  xSizeThumbArea= xSize - 2*xSizeArrow;     /* Number of pixels available for thumb and movement */  ThumbSize     = GUI__DivideRound(xSizeThumbArea * pObj->PageSize, NumItems);  if (ThumbSize < 4)    ThumbSize = 4;  xSizeMoveable = xSizeThumbArea - ThumbSize;  pPos->x1_LeftArrow  = xSizeArrow-1;  pPos->x0_RightArrow = xSize - xSizeArrow;  pPos->x0_Thumb      = pPos->x1_LeftArrow + 1+ GUI__DivideRound(xSizeMoveable * pObj->v, NumItems - pObj->PageSize);  pPos->x1_Thumb      = pPos->x0_Thumb + ThumbSize - 1;  pPos->xSizeMoveable = xSizeMoveable;  pPos->ThumbSize     = ThumbSize;}/***********************************************************************       _DrawTriangle*/static void _DrawTriangle(WIDGET* pWidget, int x, int y, int Size, int Inc) {  if (pWidget->State & WIDGET_STATE_VERTICAL) {    for (; Size >= 0; Size--, x += Inc) {      GUI_DrawHLine(x, y - Size, y + Size);    }  } else {    for (; Size >= 0; Size--, x += Inc) {      GUI_DrawVLine(x, y - Size, y + Size);    }  }}/***********************************************************************       _Paint*/static void _Paint(SCROLLBAR_Obj* pObj) {  int xArrow, ArrowSize, ArrowOff;  POSITIONS Pos;  GUI_RECT r, rClient;  /*    Get / calc position info  */  _GetPositions(pObj, &Pos);  xArrow = _GetArrowSize(pObj);  WIDGET__GetClientRect(&pObj->Widget, &rClient);  r = rClient;  ArrowSize = ((r.y1 - r.y0) /3) - 1;  /*    Draw the thumb area ( optimized ... We could also fill using GUI_Clear())  */  GUI_SetColor(pObj->aBkColor[0]);  r = rClient;  r.x0 = Pos.x1_LeftArrow + 1;  r.x1 = Pos.x0_Thumb - 1;  WIDGET__FillRectEx(&pObj->Widget, &r);  r.x0 = Pos.x1_Thumb + 1;  r.x1 = Pos.x0_RightArrow - 1;  WIDGET__FillRectEx(&pObj->Widget, &r);  /*    Draw left Arrow  */  ArrowOff = 3 + ArrowSize+ ArrowSize/3;  GUI_SetColor(pObj->aColor[0]);  r = rClient;  r.x1 = xArrow-1;  WIDGET__FillRectEx(&pObj->Widget, &r);  GUI_SetColor(pObj->aBkColor[1]);  _DrawTriangle(&pObj->Widget, r.x0 + ArrowOff, (r.y1 - r.y0) >> 1, ArrowSize, -1);  WIDGET__EFFECT_DrawUpRect(&pObj->Widget, &r);  /*    Draw right Arrow  */  GUI_SetColor(pObj->aColor[0]);  r = rClient;  r.x0 = r.x1 - (xArrow - 1);  WIDGET__FillRectEx(&pObj->Widget, &r);  GUI_SetColor(pObj->aBkColor[1]);  _DrawTriangle(&pObj->Widget, r.x1 - ArrowOff, (r.y1 - r.y0) >> 1, ArrowSize, 1);  WIDGET__EFFECT_DrawUpRect(&pObj->Widget, &r);  /*    Draw Thumb  */  r = rClient;  r.x0 = Pos.x0_Thumb;  r.x1 = Pos.x1_Thumb;  GUI_SetColor(pObj->aColor[0]);  WIDGET__FillRectEx(&pObj->Widget, &r);  WIDGET__EFFECT_DrawUpRect(&pObj->Widget, &r);}/***********************************************************************       _OnTouch*/static void _OnTouch(SCROLLBAR_Handle hObj, SCROLLBAR_Obj* pObj, WM_MESSAGE*pMsg) {  POSITIONS Pos;  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) {      int Sel;      int Range;      int x;      Sel = pObj->v;      _GetPositions(pObj, &Pos);      Range = pObj->NumItems - pObj->PageSize;      /* Swap mouse coordinates if necessary */      if (pObj->Widget.State & WIDGET_STATE_VERTICAL) {        int t = pState->x;        pState->x = pState->y;        pState->y = t;      }      x = pState->x;      if (x <= Pos.x1_LeftArrow) {         /* left arrow (line left) */        Sel--;      } else if (x < Pos.x0_Thumb) {       /* left area  (page left) */        Sel -= pObj->PageSize;      } else if (x <= Pos.x1_Thumb) {      /* Thumb area */        if (Pos.xSizeMoveable > 0) {          x = x - Pos.ThumbSize/2 - Pos.x1_LeftArrow-1;          Sel = GUI__DivideRound(Range * x, Pos.xSizeMoveable);        }      } else if (x < Pos.x0_RightArrow) {  /* right area (page right) */        Sel += pObj->PageSize;      } else {        Sel++;      }      /* WM_SetFocus(hObj); */      WM_SetCapture(hObj, 1);      SCROLLBAR_SetValue(hObj, Sel);    }  }}/***********************************************************************       _OnKey*/static void  _OnKey(SCROLLBAR_Handle hObj, WM_MESSAGE*pMsg) {  WM_KEY_INFO* pKeyInfo;  int Key;  pKeyInfo = (WM_KEY_INFO*)(pMsg->Data.p);  Key = pKeyInfo->Key;  if (pKeyInfo->PressedCnt > 0) {    switch (Key) {      case GUI_KEY_RIGHT:      case GUI_KEY_DOWN:        SCROLLBAR_Inc(hObj);        break;                    /* Send to parent by not doing anything */      case GUI_KEY_LEFT:      case GUI_KEY_UP:        SCROLLBAR_Dec(hObj);        break;                    /* Send to parent by not doing anything */      default:        return;    }  }}/***********************************************************************       _OnSetScrollState */static void _OnSetScrollState(SCROLLBAR_Handle hObj, SCROLLBAR_Obj* pObj, const WM_SCROLL_STATE* pState) {  pObj->NumItems = pState->NumItems;  pObj->PageSize = pState->PageSize;  pObj->v        = pState->v;  WM_InvalidateWindow(hObj);}/***********************************************************************       _SCROLLBAR_Callback*/static void _SCROLLBAR_Callback (WM_MESSAGE *pMsg) {  SCROLLBAR_Handle hObj;  SCROLLBAR_Obj* pObj;  hObj = pMsg->hWin;  pObj = SCROLLBAR_H2P(hObj);  /* Let widget handle the standard messages */  if (WIDGET_HandleActive(hObj, pMsg) == 0) {    return;  }  switch (pMsg->MsgId) {  case WM_PAINT:    GUI_DEBUG_LOG("SCROLLBAR: _Callback(WM_PAINT)\n");    _Paint(pObj);    return;  case WM_TOUCH:    _OnTouch(hObj, pObj, pMsg);    break;  case WM_KEY:    _OnKey(hObj, pMsg);    break;  case WM_SET_SCROLL_STATE:    _OnSetScrollState(hObj, pObj, (const WM_SCROLL_STATE*)pMsg->Data.p);    break;  case WM_GET_SCROLL_STATE:    ((WM_SCROLL_STATE*)pMsg->Data.p)->NumItems = pObj->NumItems;    ((WM_SCROLL_STATE*)pMsg->Data.p)->PageSize = pObj->PageSize;    ((WM_SCROLL_STATE*)pMsg->Data.p)->v        = pObj->v;    break;  }  WM_DefaultProc(pMsg);}/***********************************************************************       Exported routines:  Create************************************************************************//* Note: the parameters to a create function may vary.         Some widgets may have multiple create functions */SCROLLBAR_Handle SCROLLBAR_Create (int x0, int y0, int xsize, int ysize, WM_HWIN hParent, int Id, int WinFlags, int SpecialFlags) {  SCROLLBAR_Handle hObj;  WM_LOCK();  /* Set defaults if necessary */  if ((xsize == 0) && (ysize == 0)) {    GUI_RECT Rect;    WM_GetInsideRect(hParent, &Rect);    if (SpecialFlags & SCROLLBAR_CF_VERTICAL) {      xsize = _DefaultWidth;      x0 = Rect.x1 +1 - xsize;      y0 = Rect.y0;      ysize = Rect.y1 - Rect.y0 +1;    } else {      ysize = _DefaultWidth;    }  }  /* Create the window */  hObj = WM_CreateWindowAsChild(x0, y0, xsize, ysize, hParent,                       WinFlags, _SCROLLBAR_Callback, sizeof(SCROLLBAR_Obj)-sizeof(WM_Obj));  if (hObj) {    SCROLLBAR_Obj* pObj = SCROLLBAR_H2P(hObj);    U16 InitState;    /* Handle SpecialFlags */    InitState = WIDGET_STATE_ENABLED;    if (SpecialFlags & SCROLLBAR_CF_VERTICAL) {      InitState |= WIDGET_CF_VERTICAL;    }    if ((SpecialFlags & SCROLLBAR_CF_FOCUSSABLE) == 0) {      InitState |= WIDGET_STATE_FOCUSSABLE;    }    /* init widget specific variables */    WIDGET__Init(&pObj->Widget, InitState);    /* init member variables */    SCROLLBAR_INIT_ID(pObj);    pObj->Widget.Id       = Id;    pObj->aBkColor[0]   = SCROLLBAR_BKCOLOR0_DEFAULT;    pObj->aBkColor[1]   = SCROLLBAR_BKCOLOR1_DEFAULT;    pObj->aColor[0]     = SCROLLBAR_COLOR0_DEFAULT;    pObj->aColor[1]     = SCROLLBAR_COLOR1_DEFAULT;    pObj->NumItems      = 100;    pObj->PageSize      =  10;  } else {    GUI_DEBUG_ERROROUT_IF(hObj==0, "SCROLLBAR_Create failed")  }  WM_UNLOCK();  return hObj;}SCROLLBAR_Handle SCROLLBAR_CreateAttached(WM_HWIN hParent, int SpecialFlags) {  SCROLLBAR_Handle  hThis;  int Id;  Id = (SpecialFlags & SCROLLBAR_CF_VERTICAL) ? GUI_ID_VSCROLL : GUI_ID_HSCROLL;  hThis = SCROLLBAR_Create(0,0,0,0, hParent, Id, WM_CF_SHOW,         /* WinFlags */                           SpecialFlags);  if (hThis) {    WM_MESSAGE Msg;    Msg.MsgId = WM_ADD_SCROLLBAR;    WM_SendMessage(hParent, &Msg);  }  return hThis;}SCROLLBAR_Handle SCROLLBAR_CreateIndirect(const GUI_WIDGET_CREATE_INFO* pCreateInfo, WM_HWIN hWinParent, int x0, int y0, WM_CALLBACK* cb) {  SCROLLBAR_Handle  hThis;  GUI_USE_PARA(cb);  hThis = SCROLLBAR_Create(pCreateInfo->x0 + x0, pCreateInfo->y0 + y0, pCreateInfo->xSize, pCreateInfo->ySize,                        hWinParent, pCreateInfo->Id, 0, pCreateInfo->Flags);  return hThis;}/***********************************************************************       Exported routines:  Various methods************************************************************************/void SCROLLBAR_Dec(SCROLLBAR_Handle hObj) { SCROLLBAR_AddValue(hObj, -1); }void SCROLLBAR_Inc(SCROLLBAR_Handle hObj) { SCROLLBAR_AddValue(hObj,  1); }void SCROLLBAR_AddValue(SCROLLBAR_Handle hObj, int Add) {  SCROLLBAR_Obj* pObj;  if (hObj) {    WM_LOCK();    pObj = SCROLLBAR_H2P(hObj);    SCROLLBAR_SetValue(hObj, pObj->v + Add);    WM_UNLOCK();  }}void SCROLLBAR_SetValue(SCROLLBAR_Handle hObj, int v) {  SCROLLBAR_Obj* pObj;  int Max;  if (hObj) {    WM_LOCK();    pObj = SCROLLBAR_H2P(hObj);    Max = pObj->NumItems - pObj->PageSize;    if (Max < 0)      Max =0;    /* Put in min/max range */    if (v < 0) {      v = 0;    }    if (v > Max) {      v = Max;    }    if (pObj->v != v) {      pObj->v = v;      WM_InvalidateWindow(hObj);      WM_NotifyParent(hObj, WM_NOTIFICATION_VALUE_CHANGED);    }    WM_UNLOCK();  }}void SCROLLBAR_SetNumItems(SCROLLBAR_Handle hObj, int NumItems) {  SCROLLBAR_Obj* pObj;  if (hObj) {    WM_LOCK();    pObj = SCROLLBAR_H2P(hObj);    if (pObj->NumItems != NumItems) {      pObj->NumItems = NumItems;      WM_InvalidateWindow(hObj);    }    WM_UNLOCK();  }}void SCROLLBAR_SetPageSize(SCROLLBAR_Handle hObj, int PageSize) {  SCROLLBAR_Obj* pObj;  if (hObj) {    WM_LOCK();    pObj = SCROLLBAR_H2P(hObj);    if (pObj->PageSize != PageSize) {      pObj->PageSize = PageSize;      WM_InvalidateWindow(hObj);    }    WM_UNLOCK();  }}void  SCROLLBAR_SetState   (SCROLLBAR_Handle hObj, const WM_SCROLL_STATE* pState) {  if (hObj) {    SCROLLBAR_SetPageSize(hObj, pState->PageSize);    SCROLLBAR_SetNumItems(hObj, pState->NumItems);    SCROLLBAR_SetValue   (hObj, pState->v);  }}/***********************************************************************       Query state************************************************************************/int SCROLLBAR_GetValue(SCROLLBAR_Handle hObj) {  int r = 0;  SCROLLBAR_Obj* pObj;  if (hObj) {    WM_LOCK();    pObj = SCROLLBAR_H2P(hObj);    r = pObj->v;    WM_UNLOCK();  }  return r;}#endif  /* #if GUI_WINSUPPORT */