Difference between revisions of "LISTBOX - Usage (Sample)"
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This sample demonstrates the usage of a LISTBOX widget. |
This sample demonstrates the usage of a LISTBOX widget. |
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+ | == Demo == |
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+ | <html><iframe src="https://wiki.segger.com/demo/emwin/LISTBOX_Usage/LISTBOX_Usage.html" width="480" height="272" style="border: 1px #c0c0c0 solid;" marginwidth="0" marginheight="0" hspace="0" vspace="0" scrolling="no"> </iframe></html> |
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== Code == |
== Code == |
Revision as of 16:23, 7 March 2022
LISTBOX_Usage.c | |
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File(s) required |
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Runs in simulation | Yes |
Runs on target | Yes |
Download | LISTBOX_Usage.c |
This sample demonstrates the usage of a LISTBOX widget.
Demo
Code
/*********************************************************************
* SEGGER Microcontroller GmbH *
* Solutions for real time microcontroller applications *
**********************************************************************
* *
* (c) 1996 - 2020 SEGGER Microcontroller GmbH *
* *
* Internet: www.segger.com Support: support@segger.com *
* *
**********************************************************************
** emWin V6.10 - Graphical user interface for embedded applications **
emWin 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 re-
distributed in any way. We appreciate your understanding and fairness.
----------------------------------------------------------------------
File : LISTBOX_Usage.c
Purpose : Sample that demonstrates the usage of LISTBOX widgets
in emWin.
Requirements: WindowManager - (x)
MemoryDevices - ( )
AntiAliasing - ( )
VNC-Server - ( )
PNG-Library - ( )
TrueTypeFonts - ( )
---------------------------END-OF-HEADER------------------------------
*/
#include "DIALOG.h"
#include <stdio.h>
/*********************************************************************
*
* Static data
*
**********************************************************************
*/
/*********************************************************************
*
* _acContent
*/
static const char * _acContent[] = {
"English",
"Deutsch",
"Espanol",
"Francais",
"Italiano",
"Dansk",
"Eesti",
"Hrvatski",
"Portugues",
"Suomi",
NULL
};
/*********************************************************************
*
* Static code
*
**********************************************************************
*/
/*********************************************************************
*
* _cbWin
*/
static void _cbWin(WM_MESSAGE * pMsg) {
char acBuffer[32];
int Sel;
int NCode, Id;
static LISTBOX_Handle hListbox;
switch (pMsg->MsgId) {
case WM_CREATE:
//
// Create listbox widget
//
hListbox = LISTBOX_CreateEx(10, 10, 120, 80, pMsg->hWin, WM_CF_SHOW, 0, GUI_ID_LISTBOX0, _acContent);
//
// Add string to the end of the list
//
LISTBOX_AddString(hListbox, "Esperanto");
//
// Insert new string at position 5
//
LISTBOX_InsertString(hListbox, "Nederlands", 5);
//
// Change some of the appearance of the widget
//
LISTBOX_SetFont(hListbox, &GUI_Font16_1);
LISTBOX_SetBkColor(hListbox, LISTBOX_CI_SELFOCUS, GUI_DARKBLUE);
//
// Enable motion scrolling
//
LISTBOX_EnableMotion(hListbox, 1);
//
// Manually set the selection to 3
//
LISTBOX_SetSel(hListbox, 3);
break;
case WM_PAINT:
GUI_SetBkColor(GUI_BLACK);
GUI_Clear();
//
// Get current selection
// -1 means no selection
//
Sel = LISTBOX_GetSel(hListbox);
if (Sel > -1) {
sprintf(acBuffer, "The current selection is: %d", Sel);
} else {
sprintf(acBuffer, "No item is currently selected.");
}
GUI_DispStringAt(acBuffer, 150, 10);
break;
case WM_NOTIFY_PARENT:
Id = WM_GetId(pMsg->hWinSrc);
NCode = pMsg->Data.v;
switch(Id) {
case GUI_ID_LISTBOX0:
switch (NCode) {
case WM_NOTIFICATION_SEL_CHANGED:
//
// Redraw parent window when selection has changed.
//
WM_InvalidateWindow(pMsg->hWin);
break;
}
break;
}
break;
default:
WM_DefaultProc(pMsg);
break;
}
}
/*********************************************************************
*
* Public code
*
**********************************************************************
*/
/*********************************************************************
*
* MainTask
*/
void MainTask(void) {
//
// Init GUI
//
GUI_Init();
//
// Enable multi-buffering
//
WM_MULTIBUF_Enable(1);
//
// Create window
//
WM_CreateWindowAsChild(0, 0, LCD_GetXSize(), LCD_GetYSize(), WM_HBKWIN, WM_CF_SHOW, _cbWin, 0);
while (1) {
GUI_Delay(100);
}
}
/*************************** End of file ****************************/