treelist control中使用check box.mht

Tips about VCampus project.rar我们的项目VCampus project所涉及到的技术问题

=AF=E4=BB=A5=E5=BE=97=E5=88=B0state =
image=E7=9A=84=E4=B8=8B=E6=A0=87=EF=BC=89

state =
=E8=AE=BE=E7=BD=AE=E4=B8=BAINDEXTOSTATEIMAGEMASK(1)=E8=A1=A8=E7=A4=BA=E7=94=
=A8=E6=88=B7=E5=AE=9A=E4=B9=89=E7=9A=84=E7=AC=AC=E4=B8=80=E7=A7=8D=E7=8A=B6=
=E6=80=81

stateMask=E8=AE=BE=E7=BD=AE=E4=B8=BATVIS_STATEIMAGEMASK.=E8=A1=A8=E7=A4=BA=
=E7=94=A8=E6=88=B7=E5=AE=9A=E4=B9=89=E7=9A=84=E7=8A=B6=E6=80=81=E3=80=82

=E5=BD=93=E7=84=B6=E4=B9=9F=E5=8F=AF=E4=BB=A5=E8=B0=83=E7=94=A8SetItemSta=
te=E8=AE=BE=E7=BD=AEstate.

SetItemState( hItem, INDEXTOSTATEIMAGEMASK(1), TVIS_STATEIMAGEMASK );

Step 4: =E5=A2=9E=E5=8A=A0mouse button =
down=E6=B6=88=E6=81=AF=E6=98=A0=E5=B0=84

=E9=80=9A=E8=BF=87=E4=BD=BF=E7=94=A8HitTest=E6=9D=A5=E5=BE=97=E7=9F=A5=E6=
=98=AF=E5=90=A6=E6=8C=89=E5=9C=A8State=E5=9B=BE=E7=89=87=E4=B8=8A=E3=80=82=
=E5=B9=B6=E9=9C=80=E8=A6=81=E5=BE=97=E5=88=B0=E5=BD=93=E5=89=8Dstate=E3=80=
=82

void CTreeCtrlX::OnLButtonDown(UINT nFlags, CPoint point)=20


	UINT uFlags=3D0;

	HTREEITEM hti =3D HitTest(point,&uFlags);

	if( uFlags & TVHT_ONITEMSTATEICON )


		int iImage =3D GetItemState( hti, TVIS_STATEIMAGEMASK )>>12;     =
           =20

                       //GetItemState( hti, TVIS_STATEIMAGEMASK =
)>>12 =
=E5=AF=B9=E7=94=A8=E6=88=B7=E5=AE=9A=E4=B9=89state=E5=8F=8D=E5=8F=98=E6=8D=
=A2

		SetItemState( hti, INDEXTOSTATEIMAGEMASK(iImage =3D=3D 1 ? 2 : 1),=20

					TVIS_STATEIMAGEMASK );

		return;



Step 5:=E5=A4=84=E7=90=86 OnKeyDown

void CTreeCtrlX::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)=20


	if( nChar =3D=3D VK_SPACE )


		HTREEITEM hti =3D GetSelectedItem();

		int iImage =3D GetItemState( hti, TVIS_STATEIMAGEMASK )>>12;

		SetItemState( hti, INDEXTOSTATEIMAGEMASK(iImage =3D=3D 1 ? 2 : 1),

					TVIS_STATEIMAGEMASK );

		return;



Step 6: =
=E5=A2=9E=E5=8A=A0=E5=85=B6=E4=BB=96=E7=9A=84=E5=8A=9F=E8=83=BD=E5=87=BD=E6=
=95=B0

BOOL CTreeCtrlX::IsItemChecked(HTREEITEM hItem)


	return GetItemState( hItem, TVIS_STATEIMAGEMASK )>>12 =3D=3D 2;


HTREEITEM CTreeCtrlX::GetFirstCheckedItem()


	for ( HTREEITEM hItem =3D GetRootItem(); hItem!=3DNULL; hItem =3D =
GetNextItem( hItem ) )

		if ( IsItemChecked(hItem) )

			return hItem;

	return NULL;


HTREEITEM CTreeCtrlX::GetNextCheckedItem( HTREEITEM hItem )


	for ( hItem =3D GetNextItem( hItem ); hItem!=3DNULL; hItem =3D =
GetNextItem( hItem ) )

		if ( IsItemChecked(hItem) )

			return hItem;

	return NULL;


HTREEITEM CTreeCtrlX::GetPrevCheckedItem( HTREEITEM hItem )


	for ( hItem =3D GetPrevItem( hItem ); hItem!=3DNULL; hItem =3D =
GetPrevItem( hItem ) )

		if ( IsItemChecked(hItem) )

			return hItem;

	return NULL;

</PRE>
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