wm_redraw.c

来自「ＵＣＯＳⅡ嵌入式操作系统应用例子」· C语言 代码 · 共 101 行

/*
*********************************************************************************************************
*                                                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        : WM_Redraw.c
Purpose     : Demonstrates the redrawing mechanism of the window manager
----------------------------------------------------------------------
*/

#include "GUI.H"

/*******************************************************************
*
*            Callback routine for background window
*
********************************************************************
*/

static void cbBackgroundWin(WM_MESSAGE* pMsg) {
  switch (pMsg->MsgId) {
  case WM_PAINT:
    GUI_Clear();
  default:
    WM_DefaultProc(pMsg);
  }
}

/*******************************************************************
*
*            Callback routine for foreground window
*
********************************************************************
*/

static void cbForegroundWin(WM_MESSAGE* pMsg) {
  switch (pMsg->MsgId) {
  case WM_PAINT:
    GUI_SetBkColor(GUI_GREEN);
    GUI_Clear();
    GUI_DispString("Foreground window");
    break;
  default:
    WM_DefaultProc(pMsg);
  }
}

/*******************************************************************
*
*         Demonstrates the redraw mechanism of emWinGSC
*
********************************************************************
*/

static void DemoRedraw(void) {
  GUI_HWIN hWnd;
  while(1) {
    /* Create foreground window */
    hWnd = WM_CreateWindow(10, 10, 100, 100, WM_CF_SHOW, cbForegroundWin, 0);
    /* Show foreground window */
    GUI_Delay(1000);
    /* Delete foreground window */
    WM_DeleteWindow(hWnd);
    GUI_DispStringAt("Background of window has not been redrawn", 10, 10);
    /* Wait a while, background will not be redrawn */
    GUI_Delay(1000);
    GUI_Clear();
    /* Set callback for Background window */
    WM_SetCallback(WM_HBKWIN, cbBackgroundWin);
    /* Create foreground window */
    hWnd = WM_CreateWindow(10, 10, 100, 100,WM_CF_SHOW, cbForegroundWin, 0);
    /* Show foreground window */
    GUI_Delay(1000);
    /* Delete foreground window */
    WM_DeleteWindow(hWnd);
    /* Wait a while, background will be redrawn */
    GUI_Delay(1000);
    /* Delete callback for Background window */
    WM_SetCallback(WM_HBKWIN, 0);
 }}

/*******************************************************************
*
*                 main
*
********************************************************************
*/

void main(void) {
  GUI_Init();
  DemoRedraw();
}