55.2 官方DIALOG_SliderColor实例 官方的这个实例很好的演示了slider的使用,这个例子在模拟器中的位置:
源码如下(程序中进行了详细的注释,数据部分没有贴出):
- /*********************************************************************
- *
- * Dialog resource
- * 对话框资源表
- */
- static const GUI_WIDGET_CREATE_INFO _aDialogCreate[] = {
- { FRAMEWIN_CreateIndirect, "Adjust color", 0, 10, 40, 300, 160, FRAMEWIN_CF_MOVEABLE},
- { TEXT_CreateIndirect, "Red:" , 0, 5, 20, 35, 20, TEXT_CF_LEFT },
- { TEXT_CreateIndirect, "Green:", 0, 5, 50, 35, 20, TEXT_CF_LEFT },
- { TEXT_CreateIndirect, "Blue:", 0, 5, 80, 35, 20, TEXT_CF_LEFT },
- { TEXT_CreateIndirect, "Preview",0, 205, 4, 81, 15, TEXT_CF_HCENTER },
- { SLIDER_CreateIndirect, NULL, GUI_ID_SLIDER0, 40, 20, 100, 20 },
- { SLIDER_CreateIndirect, NULL, GUI_ID_SLIDER1, 40, 50, 100, 20 },
- { SLIDER_CreateIndirect, NULL, GUI_ID_SLIDER2, 40, 80, 100, 20 },
- { EDIT_CreateIndirect, NULL, GUI_ID_EDIT0, 145, 20, 30, 20, 0, 3 },
- { EDIT_CreateIndirect, NULL, GUI_ID_EDIT1, 145, 50, 30, 20, 0, 3 },
- { EDIT_CreateIndirect, NULL, GUI_ID_EDIT2, 145, 80, 30, 20, 0, 3 },
- { BUTTON_CreateIndirect, "OK", GUI_ID_OK, 10, 110, 60, 20 },
- { BUTTON_CreateIndirect, "Cancel", GUI_ID_CANCEL, 230, 110, 60, 20 },
- };
-
- /*********************************************************************
- *
- * Static data, colors
- *
- **********************************************************************
- */
- static U8 _aColorSep[3] = {0, 127, 255}; // Red, green and blue components
-
- /*********************************************************************
- *
- * _OnPaint
- * 这个函数用于绘制三个小的单色矩形方框和一个大的举行方框
- */
- static void _OnPaint(void) {
- //
- // 绘制RGB颜色方框
- //
- GUI_SetColor(_aColorSep[0]);
- GUI_FillRect(180, 20, 199, 39);
- GUI_SetColor(_aColorSep[1] << 8);
- GUI_FillRect(180, 50, 199, 69);
- GUI_SetColor(((U32)_aColorSep[2]) << 16);
- GUI_FillRect(180, 80, 199, 99);
- //
- // 绘制RGB三种颜色混合后的结果
- //
- GUI_SetColor(_aColorSep[0] | (((U32)_aColorSep[1]) << 8) | (((U32)_aColorSep[2]) << 16));
- GUI_FillRect(205, 20, 285, 99);
- }
-
- /*********************************************************************
- *
- * _OnValueChanged
- */
- static void _OnValueChanged(WM_HWIN hDlg, int Id) {
- unsigned Index;
- unsigned v;
- WM_HWIN hSlider;
- WM_HWIN hEdit;
-
- Index = 0;
- v = 0;
- if ((Id >= GUI_ID_SLIDER0) && (Id <= GUI_ID_SLIDER2)) {
- Index = Id - GUI_ID_SLIDER0;
- //
- // 滑块的数值被更改后,更新编辑框中的数值
- //
- hSlider = WM_GetDialogItem(hDlg, GUI_ID_SLIDER0 + Index);
- hEdit = WM_GetDialogItem(hDlg, GUI_ID_EDIT0 + Index);
- v = SLIDER_GetValue(hSlider);
- EDIT_SetValue(hEdit, v);
- } else if ((Id >= GUI_ID_EDIT0) && (Id <= GUI_ID_EDIT2)) {
- Index = Id - GUI_ID_EDIT0;
- //
- // 编辑框中的数值更改后,更新滑块的数值
- //
- hSlider = WM_GetDialogItem(hDlg, GUI_ID_SLIDER0 + Index);
- hEdit = WM_GetDialogItem(hDlg, GUI_ID_EDIT0 + Index);
- v = EDIT_GetValue(hEdit);
- SLIDER_SetValue(hSlider, v);
- }
- _aColorSep[Index] = v;
- //
- // 最后通过使得对话框客户端窗口无效,进而执行对话框回调函数中的WM_PAINT消息
- //
- WM_InvalidateWindow(WM_GetClientWindow(hDlg));
- }
-
- /*********************************************************************
- *
- * _cbBkWindow
- * 桌面窗口回调函数
- */
- static void _cbBkWindow(WM_MESSAGE * pMsg) {
- int xPos;
- int yPos;
-
- xPos = LCD_GetXSize() / 2 - bmSeggerLogoBlue.XSize/2;
- yPos = LCD_GetYSize() / 2 - bmSeggerLogoBlue.YSize/2 ;
- switch (pMsg->MsgId) {
- case WM_PAINT:
- GUI_SetBkColor(GUI_BLUE);
- GUI_Clear();
- GUI_SetColor(GUI_WHITE);
- GUI_SetFont(&GUI_Font24_ASCII);
- GUI_DispStringHCenterAt("DIALOG_SliderColor - Sample", 160, 5);
- GUI_DrawBitmap(&bmSeggerLogoBlue, xPos, yPos );
- default:
- WM_DefaultProc(pMsg);
- }
- }
-
- /*********************************************************************
- *
- * _cbCallback
- */
- static void _cbCallback(WM_MESSAGE * pMsg) {
- WM_HWIN hDlg;
- WM_HWIN hItem;
- int i;
- int NCode;
- int Id;
-
- hDlg = pMsg->hWin;
- switch (pMsg->MsgId) {
- case WM_PAINT:
- _OnPaint();
- return;
- case WM_INIT_DIALOG:
- for (i = 0; i < 3; i++) {
- /* 初始化滑块 */
- hItem = WM_GetDialogItem(hDlg, GUI_ID_SLIDER0 + i);
- SLIDER_SetRange(hItem, 0, 255);
- SLIDER_SetValue(hItem, _aColorSep[i]);
- //
- // 初始化编辑框
- //
- hItem = WM_GetDialogItem(hDlg, GUI_ID_EDIT0 + i);
- EDIT_SetDecMode(hItem, _aColorSep[i], 0, 255, 0, 0);
- }
- break;
- case WM_KEY:
- switch (((WM_KEY_INFO*)(pMsg->Data.p))->Key) {
- case GUI_KEY_ESCAPE:
- ;
- break;
- case GUI_KEY_ENTER:
- GUI_EndDialog(hDlg, 0);
- break;
- }
- break;
- case WM_NOTIFY_PARENT:
- Id = WM_GetId(pMsg->hWinSrc); // Id of widget
- NCode = pMsg->Data.v; // Notification code
- switch (NCode) {
- case WM_NOTIFICATION_RELEASED: // React only if released
- if (Id == GUI_ID_OK) { // OK Button
- GUI_EndDialog(hDlg, 0);
- }
- if (Id == GUI_ID_CANCEL) { // Cancel Button
- GUI_EndDialog(hDlg, 1);
- }
- break;
- case WM_NOTIFICATION_VALUE_CHANGED: // Value has changed
- _OnValueChanged(hDlg, Id);
- break;
- }
- break;
- default:
- WM_DefaultProc(pMsg);
- }
- }
-
- /*********************************************************************
- *
- * Public code
- *
- **********************************************************************
- */
- /*********************************************************************
- *
- * MainTask
- */
- void MainTask(void) {
- GUI_Init();
- GUI_CURSOR_Show();
- WM_SetCallback(WM_HBKWIN, _cbBkWindow);
- WM_SetCreateFlags(WM_CF_MEMDEV); // Use memory devices on all windows to avoid flicker
- while (1) {
- GUI_ExecDialogBox(_aDialogCreate, GUI_COUNTOF(_aDialogCreate), &_cbCallback, 0, 0, 0);
- GUI_Delay(1000);
- }
- }
复制代码
实际显示效果如下: |