如何在BUIW中，让过长的文字自动产生scroll bar

[clubnekol]

如题，怎么在文字很长的时候，可以自动产生scroll bar呢？
在BUIW中，要用哪个widget来显示文字呢？或者要设哪一个Flag可以出现scrll bar
谢谢。

[bencharluo]

有个autohide相关的属性，创建的时候将他设置一下，然后他就显示了

[clubnekol]

请问你是用什么widget来创建的呢？有没有sample code...thanks

[bxk253387223]

一个TextWidget，加一个ScrollWidget就可以。

最近挺忙的，等有空给你写一个。

[clubnekol]

使用textwidget，不是要让使用者输入的吗，例如要创建一个输入法的widget
我指的是单纯的显示文字，例如软件都有一个about，可以看软件信息
我目前使用的是IWIDGET_SetText+viewport widget + scrollwidget
所以各位的意思是用textwidget就行了吗

[bxk253387223]

如果不是输入，好像就要使用ViewPortWidget了。

[clubnekol]

我会出现scrollbar，但是往下滚动的时候，画面不会跟着滚动，请问你知道原因吗
我有设SBWF_FOCUSTRACK

[bxk253387223]

这要看你代码咋写的了。

[半吊子全栈工匠]

TextWidget+ scrollwidget

[bxk253387223]

#include "AEE.h"   
#include "AEEShell.h" 
#include "AEEFont.h"
#include "AEEDisp.h"  
#include "AEEStdLib.h"
#include "AEEText.h"
#include "AEEWidget.h"
#include "AEERootContainer.h"
#include "AEEDisplayCanvas.h"
#include "AEEDecorator.h"
#include "AEETextWidget.h"
#include "AEEScrollWidget.h"

#include "TestApp.bid"

#ifndef RELEASEIF
#define RELEASEIF(p)       ReleaseIf((IBase**)&p)
static void ReleaseIf(IBase **ppif) {
   if (*ppif) {
      IBASE_Release(*ppif); 
      *ppif = 0;
   }
}
#endif

#define HOME_PAGE "hsrc/index.htm"
#define GO_BACK 0

/*-------------------------------------------------------------------
Applet structure. All variables in here are reference via "me->"
-------------------------------------------------------------------*/
// create an applet structure that's passed around. All variables in
// here will be able to be referenced as static.
typedef struct _testapp {

	IApplet              ia;   
	IAppletVtbl          iavt;  	
	int                  nRefs;
    IDisplay             *pIDisplay;  // give a standard way to access the Display interface
    IShell               *pIShell;    // give a standard way to access the Shell interface
	IModule				 *pIModule;
	AEEDeviceInfo        DeviceInfo; // always have access to the hardware device information

    // add your own variables here...
	//IController *        piTextCtl;		// text controller
	IRootContainer *     picRoot;		// root container
	IWidget *            piwRoot;		// root container's widget i/f
	AEERect              rcRoot;
	ICanvas *            piCanvas;	
	IWidget *            piwScroll;	
	IWidget *            piwText;	

} testapp;

static uint32  testapp_AddRef (IApplet *po);
static uint32  testapp_Release (IApplet *po);
static  boolean  testapp_HandleEvent (IApplet *pi, AEEEvent eCode, uint16 wParam, uint32 dwParam);

static boolean testapp_HandleEvent(IApplet * pi, AEEEvent eCode, uint16 wParam, uint32 dwParam)
{  
	testapp *me = (testapp *)pi;
	if(EVT_APP_START == wParam)
		return TRUE;

	if(me->piwText)
		if (IWIDGET_HandleEvent(me->piwText, eCode, wParam, dwParam))
			return TRUE;

	return FALSE;
}

static int testapp_CreateHelloWidget(testapp *me)
{

	int nErr=0;
	IBitmap *pib = 0;
	WidgetPos dwpos;
	WExtent we;
	AEEBitmapInfo  biDevice;

	dwpos.x = dwpos.y = 0;
	dwpos.bVisible = TRUE;

    me->DeviceInfo.wStructSize = sizeof(me->DeviceInfo);
    ISHELL_GetDeviceInfo(me->pIShell,&me->DeviceInfo);

    nErr = ISHELL_CreateInstance(me->pIShell, AEECLSID_DISPLAY, (void **)&(me->pIDisplay));
	nErr = ISHELL_CreateInstance(me->pIShell, AEECLSID_ROOTCONTAINER, (void *)(&me->picRoot));
	if (SUCCESS != nErr)
		return FALSE;
	nErr = IROOTCONTAINER_QueryInterface(me->picRoot, AEEIID_WIDGET, (void *)(&me->piwRoot));
	if (SUCCESS != nErr)
		return FALSE;

	nErr = IDISPLAY_GetDeviceBitmap(me->pIDisplay, &pib);
	if (SUCCESS != nErr)
		return FALSE;


		IBITMAP_GetInfo(pib, &biDevice, sizeof(biDevice));
		SETAEERECT(&(me->rcRoot), 0, 0, (short) biDevice.cx, (short) biDevice.cy);
		nErr = ISHELL_CreateInstance(me->pIShell, AEECLSID_DISPLAYCANVAS, (void**)&(me->piCanvas));
		if (SUCCESS != nErr)
		{
			IBITMAP_Release(pib);
			return FALSE;
		}
	
	nErr = IDISPLAYCANVAS_SetDisplay((IDisplayCanvas*)me->piCanvas, me->pIDisplay);
	if (SUCCESS != nErr)
		return FALSE;

	IROOTCONTAINER_SetCanvas(me->picRoot, me->piCanvas, &(me->rcRoot));

// begin creating all widgets here
    nErr = ISHELL_CreateInstance(me->pIShell, AEECLSID_TEXTWIDGET, (void **)&(me->piwText));
	if (SUCCESS != nErr)
		return FALSE;

	IWIDGET_SetFlags(me->piwText,TWF_MULTILINE);
	IWIDGET_GetPreferredExtent(me->piwText, &we);
	we.width = (me->DeviceInfo).cxScreen/2;
	we.height = (me->DeviceInfo).cyScreen/2;
	IWIDGET_SetExtent(me->piwText, &we);

	nErr = ISHELL_CreateInstance(me->pIShell, AEECLSID_SCROLLBARWIDGET, (void**)&me->piwScroll);   
    if (SUCCESS != nErr) 
        return FALSE;   

    IWIDGET_SetProperty((me->piwScroll), PROP_ACTIVE_SCROLLCOLOR,MAKE_RGB(0,255,0));
    IWIDGET_SetProperty((me->piwScroll), PROP_INACTIVE_SCROLLCOLOR,MAKE_RGB(0,255,0)); 
	IWIDGET_SetProperty((me->piwScroll), PROP_ACTIVE_SCROLLHANDLECOLOR, MAKE_RGB(255,0,0));
	IWIDGET_SetProperty((me->piwScroll), PROP_INACTIVE_SCROLLHANDLECOLOR, MAKE_RGB(255,0,0));
	IWIDGET_SetProperty((me->piwScroll), PROP_FLAGS, SCROLL_VERT|SBWF_NOAUTOHIDE|SBWF_ARROWS );

	IDECORATOR_SetWidget((IDecorator*)me->piwScroll, (IWidget *)me->piwText); 

	IROOTCONTAINER_Insert(me->picRoot, me->piwScroll, WIDGET_ZNORMAL, &dwpos); 

	RELEASEIF(pib);
    return TRUE;
}

static int testapp_Construct(testapp *me, IModule * piModule, IShell * piShell)
{
   me->ia.pvt           = &me->iavt;
   me->iavt.AddRef      = testapp_AddRef;
   me->iavt.Release     = testapp_Release;
   me->iavt.HandleEvent = testapp_HandleEvent;

   me->nRefs = 1;

   me->pIShell = piShell;
   ISHELL_AddRef(piShell);

   me->pIModule = piModule;
   IMODULE_AddRef(piModule);
   
   testapp_CreateHelloWidget(me);

   return 0;
}

static void testapp_Dtor(testapp *me)
{

	RELEASEIF(me->piwText);
	RELEASEIF(me->piwScroll);
	RELEASEIF(me->piwRoot);
	RELEASEIF(me->pIDisplay);
	RELEASEIF(me->piCanvas);
	RELEASEIF(me->pIModule);
	RELEASEIF(me->pIShell);
}

static uint32 testapp_AddRef(IApplet *po)
{
   testapp *me = (testapp *)po;
   return ++me->nRefs;
}


static uint32 testapp_Release(IApplet *po)
{
   testapp *me = (testapp *)po;
   uint32 nRefs = --me->nRefs;
   if (nRefs == 0) {
      testapp_Dtor(me);
      FREE(me);
   }
   return nRefs;
}


#include "xmod.h"

int xModule_CreateInstance(IModule *module, IShell *shell, AEECLSID idClass, void **pp)
{
   if (idClass == AEECLSID_TESTAPP) {
      testapp *me = MALLOCREC(testapp);

      if (me == 0) {
         return ENOMEMORY;
      } else {
         *pp = &me->ia;
         return testapp_Construct(me, module, shell);
      }
   }

   *pp = 0;
   return ECLASSNOTSUPPORT;
}