EMWIN 按鍵調整文本控件顯示

ID:85681 · 發表于 2015-7-15 02:34

要讓文本控件實時顯示變化的數，不能直接賦值，否則會死機，需要將變量轉換成字符串再發送給文本控件，步驟很簡單。
功能：兩個按鍵實現文本控件的數字加減變化。
第一步：定義全局變量（不能定義局部變量，因為窗口重繪時候會將變量初始化）
         char buf[2];
         int i=0;
第二步：在static void _cbDialog(WM_MESSAGE * pMsg)函數里里面定義WM_HWIN hWin = pMsg->hWin;
第三步：在按鍵里面添加自己的代碼（我采用按鍵按下執行變量加或者減一）：
         （其實就是將變量存入數組中，將變量轉換成字符串，然后賦給TEXT_SetText
            i++;if(i>59) i=0;
            sprintf(buf,  "%2d", i);
            TEXT_SetText(WM_GetDialogItem(hWin,ID_TEXT_0), buf);

界面用 GUI_Builder建立，添加兩個按鈕和一個文本框TEXT，然后導入到代碼工程里，
在main.c中申明一下函數void ButtonUse_Demo(void);
然后在任務里運行ButtonUse_Demo(); 即可。（我用UCOSII系統）
感謝ALIENTEK技術交流群的網友神散形不散tnx@139.com(673882715) 的大力幫助，在此特地發表此文章，幫組初學EMWIN系統的孩子們能快速進入實戰，省去自己摸索的時間。

//實例代碼
#include "DIALOG.h"
#define ID_FRAMEWIN_0 (GUI_ID_USER + 0x04)
#define ID_BUTTON_0 (GUI_ID_USER + 0x05)
#define ID_BUTTON_1 (GUI_ID_USER + 0x06)
#define ID_TEXT_0 (GUI_ID_USER + 0x07)

char buf[2];
int i=0;

static const GUI_WIDGET_CREATE_INFO _aDialogCreate[] = {
  { FRAMEWIN_CreateIndirect, "Framewin", ID_FRAMEWIN_0, 4, 18, 216, 239, 0, 0x0, 0 },
  { BUTTON_CreateIndirect, "Button", ID_BUTTON_0, 117, 127, 70, 90, 0, 0x0, 0 },
  { BUTTON_CreateIndirect, "Button", ID_BUTTON_1, 11, 127, 70, 90, 0, 0x0, 0 },
  { TEXT_CreateIndirect, "Text", ID_TEXT_0, 63, 11, 121, 89, 0, 0x64, 0 },
};

static void _cbDialog(WM_MESSAGE * pMsg)
{
WM_HWIN hItem;
int    NCode;
int    Id;
WM_HWIN hWin = pMsg->hWin;

switch (pMsg->MsgId)
{
         case WM_INIT_DIALOG:
                  // Initialization of 'Button'
                  hItem = WM_GetDialogItem(pMsg->hWin, ID_BUTTON_0);
                  BUTTON_SetText(hItem, "+");
                  BUTTON_SetFont(hItem, GUI_FONT_D48X64);
                  // Initialization of 'Button'
                  hItem = WM_GetDialogItem(pMsg->hWin, ID_BUTTON_1);
                  BUTTON_SetText(hItem, "-");
                  BUTTON_SetFont(hItem, GUI_FONT_D48X64);
                  // Initialization of 'Text'
                  hItem = WM_GetDialogItem(pMsg->hWin, ID_TEXT_0);
                  TEXT_SetText(hItem, " 0");
                  TEXT_SetFont(hItem, GUI_FONT_D60X80);
                  TEXT_SetTextColor(hItem, 0x000000FF);
      break;
      case WM_NOTIFY_PARENT:
                  Id = WM_GetId(pMsg->hWinSrc);
                  NCode = pMsg->Data.v;
                  switch(Id)
                  {
                        case ID_BUTTON_0: // Notifications sent by 'Button'
                                 switch(NCode)
                                 {
                                       case WM_NOTIFICATION_CLICKED:
                                             i++;
                                             if(i>59) i=0;
                                             sprintf(buf,  "%2d", i);
                                             TEXT_SetText(WM_GetDialogItem(hWin,ID_TEXT_0), buf);
                                       break;
                                       case WM_NOTIFICATION_RELEASED:
                                       break;
                                 }
                        break;
                        case ID_BUTTON_1: // Notifications sent by 'Button'
                              switch(NCode)
                              {
                                    case WM_NOTIFICATION_CLICKED:
                                          i--;
                                          if(i<0) i=59;
                                          sprintf(buf,  "%2d", i);
                                          TEXT_SetText(WM_GetDialogItem(hWin,ID_TEXT_0), buf);
                                    break;
                                    case WM_NOTIFICATION_RELEASED:
                                    break;
                              }
                        break;
                  }
                  break;
               default:
            WM_DefaultProc(pMsg);
            break;
      }
}

//創建一個對話框
WM_HWIN CreateFramewin(void)
{
WM_HWIN hWin;

hWin = GUI_CreateDialogBox(_aDialogCreate, GUI_COUNTOF(_aDialogCreate), _cbDialog, WM_HBKWIN, 0, 0);
return hWin;
}

//BUTTO演示函數
void ButtonUse_Demo(void)
{
WM_HWIN hWin;
hWin=CreateFramewin();
while(1)
{
GUI_Delay(100);
}
}

//附圖