遍匈 / Windows園殻 / 4、補竃猟忖 /

眉、Windows園殻岻獄強訳!獄強訳嶧連

壓喘報炎汽似獄強訳賜宀溶強壌強圭翠扮?Windows公完笥嶧連侃尖殻會窟僕WM_VSCROLL?工貧和卞強?才WM_HSCROLL?工恣嘔卞強?嶧連。壓獄強訳貧議耽倖報炎強恬脅崛富恢伏曾倖嶧連?匯訳壓梓和報炎梓泥扮恢伏?匯訳壓瞥慧梓泥扮恢伏。

才侭嗤議嶧連匯劔?WM_VSCROLL才WM_HSCROLL匆揮嗤wParam才lParam嶧連歌方。斤噐栖徭恬葎完笥議匯何蛍遇秀羨議獄強訳嶧連?艇辛參策待lParam?万峪喘噐恬葎徨完笥遇秀羨議獄強訳?宥械壓斤三崇坪?。

wParam嶧連歌方瓜蛍葎匯倖詰忖怏才匯倖互忖怏。wParam議詰忖怏頁匯倖方峙?万峺竃阻報炎斤獄強訳序佩議荷恬。宸倖方峙瓜心恬匯倖仝宥岑鷹々。宥岑鷹議峙喇參SB?旗燕仝scroll bar?獄強訳?々?蝕遊議炎紛憲協吶。參和頁壓WINUSER.H嶄協吶議宥岑鷹?

#define SB_LINEUP 0
 
#define SB_LINELEFT 0
 
#define SB_LINEDOWN 1
 
#define SB_LINERIGHT 1
 
#define SB_PAGEUP 2
 
#define SB_PAGELEFT 2
 
#define SB_PAGEDOWN 3
 
#define SB_PAGERIGHT 3
 
#define SB_THUMBPOSITION 4
 
#define SB_THUMBTRACK 5
 
#define SB_TOP 6
 
#define SB_LEFT 6
 
#define SB_BOTTOM 7
 
#define SB_RIGHT 7
 
#define SB_ENDSCROLL 8

淫根LEFT才RIGHT議炎紛憲喘噐邦峠獄強訳?淫根UP、DOWN、TOP才BOTTOM議炎紛憲喘噐換岷獄強訳。報炎壓獄強訳議音揖曝囃汽似侭恢伏議宥岑鷹泌夕4-7侭幣。

泌惚壓獄強訳議光倖何了梓廖報炎囚?殻會祥嬬辺欺謹倖獄強訳嶧連。輝瞥慧報炎囚朔?殻會氏辺欺匯倖揮嗤SB_ENDSCROLL宥岑鷹議嶧連。匯違辛參策待宸倖嶧連?Windows音氏肇個延壌強圭翠議了崔?遇艇辛參壓殻會嶄柵出SetScrollPos栖個延壌強圭翠議了崔。

輝委報炎議高炎慧壓壌強圭翠貧旺梓廖報炎囚扮?艇祥辛參卞強壌強圭翠。宸劔祥恢伏阻揮嗤SB_THUMBTRACK才SB_THUMBPOSITION宥岑鷹議獄強訳嶧連。壓wParam議詰忖怏頁SB_THUMBTRACK扮?wParam議互忖怏頁聞喘宀壓溶強壌強圭翠扮議朕念了崔。乎了崔了噐壌強双袈律議恷弌峙才恷寄峙岻寂。壓wParam議詰忖怏頁SB_THUMBPOSITION扮?wParam議互忖怏頁聞喘宀瞥慧報炎囚朔壌強圭翠議恷嶮了崔。斤噐凪万議壌強双荷恬?wParam議互忖怏哘乎瓜策待。

葎阻公聞喘宀戻工指澄?Windows壓艇喘報炎溶強壌強圭翠扮卞強万?揖扮艇議殻會氏辺欺SB_THUMBTRACK嶧連。隼遇?泌惚音宥狛柵出SetScrollPos栖侃尖SB_THUMBTRACK賜SB_THUMBPOSITION嶧連?壓聞喘宀瞥慧報炎囚朔?壌強圭翠氏儻堀柳指圻栖議了崔。

殻會嬬校侃尖SB_THUMBTRACK賜SB_THUMBPOSITION嶧連?徽匯違音揖扮侃尖曾宀。泌惚侃尖SB_THUMBTRACK嶧連?壓聞喘宀溶強壌強圭翠扮艇俶勣卞強?塋焦瘕魑陳敞檗6甗膵蔲??SB_THUMBPOSITION嶧連?夸峪俶壓聞喘宀唯峭溶強壌強圭翠扮卞強?塋焦瘕魑陳敞檗4??SB_THUMBTRACK嶧連厚挫匯乂?徽厚是佃??斤噐蝶乂侏蓑議方象?艇議殻會辛嬬載佃効貧恢伏議嶧連。

WINUSER.H燕遊猟周珊淫凄SB_TOP、SB_BOTTOM、SB_LEFT才SB_RIGHT宥岑鷹?峺竃獄強訳厮将瓜卞欺阻万議恷弌賜恷寄了崔。隼遇?斤噐恬葎哘喘殻會完笥匯何蛍遇秀羨議獄強訳栖傍?喟垓音氏俊辺欺宸乂宥岑鷹。

壓獄強訳袈律聞喘32了議峙匆頁嗤丼議?勝砿宸音械需。隼遇?wParam議互忖怏峪嗤16了議寄弌?万音嬬癖輝仇峺竃SB_THUMBTRACK才SB_THUMBPOSITION荷恬議了崔。壓宸嶽秤趨和?俶勣聞喘GetScrollInfo痕方?壓和中宙峰?栖誼欺佚連。

壓SYSMETS嶄紗秘壌強孔嬬

念中議傍苧厮将載峋勝阻?孖壓?勣繍椎乂叫廉強返恂恂心阻。斑厘断蝕兵扮酒汽乂?貫換岷壌強彭返?咀葎厘断糞壓湊俶勣換岷壌強阻?遇壙扮珊辛參音喘邦峠壌強。SYSMET2泌殻會4-3侭幣。宸倖殻會辛嬬頁獄強訳議恷酒汽議哘喘。

殻會4-3 SYSMETS2.C 
 
/*------------------------------------------------------------------
 
 SYSMETS2.C -- System Metrics Display Program No. 2
 
 (c) Charles Petzold, 1998
 
------------------------------------------------------------------*/
 
#include <windows.h>
 
#include "sysmets.h"
 
LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
 
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
 
 PSTR szCmdLine, int iCmdShow)
 
{
 
 static TCHAR szAppName[] = TEXT ("SysMets2") ;
 
 HWND hwnd ;
 
 MSG msg ;
 
 WNDCLASS wndclass ;
 
 wndclass.style = CS_HREDRAW | CS_VREDRAW ;
 
 wndclass.lpfnWndProc = WndProc ;
 
 wndclass.cbClsExtra = 0 ;
 
 wndclass.cbWndExtra = 0 ;
 
 wndclass.hInstance = hInstance ;
 
 wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
 
 wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
 
 wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
 
 wndclass.lpszMenuName = NULL ;
 
 wndclass.lpszClassName = szAppName ;
 
 if (!RegisterClass (&wndclass))
 
 {
 
 MessageBox (NULL, TEXT ("This program requires Windows NT!"),
 
 szAppName, MB_ICONERROR) ;
 
 return 0 ;
 
 }
 
 hwnd = CreateWindow (szAppName, TEXT ("Get System Metrics No. 2"),
 
 WS_OVERLAPPEDWINDOW | WS_VSCROLL,
 
 CW_USEDEFAULT, CW_USEDEFAULT,
 
 CW_USEDEFAULT, CW_USEDEFAULT,
 
 NULL, NULL, hInstance, NULL) ;
 
 ShowWindow (hwnd, iCmdShow) ;
 
 UpdateWindow (hwnd) ;
 
 while (GetMessage (&msg, NULL, 0, 0))
 
 {
 
 TranslateMessage (&msg) ;
 
 DispatchMessage (&msg) ;
 
 }
 
 return msg.wParam ;
 
}
 
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 
{
 
 static int cxChar, cxCaps, cyChar, cyClient, iVscrollPos ;
 
 HDC hdc ; 
 
 int i, y ; 
 
 PAINTSTRUCT ps ;
 
 TCHAR szBuffer[10] ; 
 
 TEXTMETRIC tm ; 
 
 switch (message) 
 
 {
 
case WM_CREATE:
 
 hdc = GetDC (hwnd) ;
 
 GetTextMetrics (hdc, &tm) ;
 
 cxChar = tm.tmAveCharWidth ;
 
 cxCaps = (tm.tmPitchAndFamily & 1 ? 3 : 2) * cxChar / 2 ;
 
 cyChar = tm.tmHeight + tm.tmExternalLeading ;
 
 ReleaseDC (hwnd, hdc) ;
 
 SetScrollRange (hwnd, SB_VERT, 0, NUMLINES - 1, FALSE) ;
 
 SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;
 
 return 0 ;
 
 case WM_SIZE:
 
 cyClient = HIWORD (lParam) ;
 
 return 0 ;
 
 case WM_VSCROLL:
 
 switch (LOWORD (wParam))
 
 {
 
 case SB_LINEUP:
 
 iVscrollPos -= 1 ;
 
 break ;
 
 
 
 case SB_LINEDOWN:
 
 iVscrollPos += 1 ;
 
 break ;
 
 case SB_PAGEUP:
 
 iVscrollPos -= cyClient / cyChar ;
 
 break ;
 
 
 
 case SB_PAGEDOWN:
 
 iVscrollPos += cyClient / cyChar ;
 
 break ;
 
 
 
 case SB_THUMBPOSITION:
 
 iVscrollPos = HIWORD (wParam) ;
 
 break ;
 
 
 
 default :
 
 break ;
 
 }
 
 iVscrollPos = max (0, min (iVscrollPos, NUMLINES - 1)) ;
 
 if (iVscrollPos != GetScrollPos (hwnd, SB_VERT))
 
 {
 
 SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;
 
 InvalidateRect (hwnd, NULL, TRUE) ;
 
 }
 
 return 0 ;
 
 case WM_PAINT:
 
 hdc = BeginPaint (hwnd, &ps) ;
 
 for (i = 0 ; i < NUMLINES ; i++)
 
 {
 
 y = cyChar * (i - iVscrollPos) ;
 
 TextOut (hdc, 0, y,
 
 sysmetrics[i].szLabel,
 
 lstrlen (sysmetrics[i].szLabel)) ;
 
 
 
 TextOut (hdc, 22 * cxCaps, y,
 
 sysmetrics[i].szDesc,
 
 lstrlen (sysmetrics[i].szDesc)) ;
 
 
 
 SetTextAlign (hdc, TA_RIGHT | TA_TOP) ;
 
 TextOut (hdc, 22 * cxCaps + 40 * cxChar, y, szBuffer,
 
 wsprintf (szBuffer, TEXT ("%5d"),
 
 GetSystemMetrics (sysmetrics[i].iIndex))) ;
 
 SetTextAlign (hdc, TA_LEFT | TA_TOP) ;
 
 }
 
 EndPaint (hwnd, &ps) ;
 
 return 0 ;
 
 case WM_DESTROY:
 
 PostQuitMessage (0) ;
 
 return 0 ;
 
 }
 
 return DefWindowProc (hwnd, message, wParam, lParam) ;
 
}

仟議CreateWindow柵出壓及眉倖歌方嶄淫根阻WS_VSCROLL完笥劔塀?貫遇壓完笥嶄紗秘阻換岷獄強訳?凪完笥劔塀葎?

WS_OVERLAPPEDWINDOW | WS_VSCROLL

WndProc完笥嶧連侃尖殻會壓侃尖WM_CREATE嶧連扮奐紗阻曾訳偃峰?參譜崔換岷獄強訳議袈律才兜兵了崔?

SetScrollRange (hwnd, SB_VERT, 0, NUMLINES - 1, FALSE) ;
 
SetScrollPos (hwnd, SB_VERT, iVscrollPos, TRUE) ;

sysmetrics潤更醤嗤NUMLINES佩猟忖?侭參獄強訳袈律瓜譜協葎0崛NUMLINES-1。獄強訳議耽倖了崔斤哘噐壓?塋焦瘕魘ゲ刃塋承漬燦氅鍔嶄弌H膵薏躑噯戎薺栂志知?0?夸及匯佩氏瓜慧崔壓?塋焦瘕魑超ゲ拭H膵?志担靡?0?凪万佩祥氏竃孖壓?塋焦瘕魑超ゲ拭5盈志知?NUMLINES-1扮?夸恷朔匯佩猟忖竃孖壓?塋焦瘕魑超ゲ拭?

葎阻嗤廁噐侃尖WM_VSCROLL嶧連?壓完笥嶧連侃尖殻會嶄協吶阻匯倖床蓑延楚iVscrollPos?宸匯延楚頁獄強訳坪壌強圭翠議朕念了崔。斤噐SB_LINEUP才SB_LINEDOWN?峪俶勣繍壌強圭翠距屁匯倖汽了議了崔。斤噐SB_PAGEUP才SB_PAGEDOWN?厘断?卞強匯屁中議坪否?賜宀卞強cyClient /cyChar倖汽了議了崔。斤噐SB_THUMBPOSITION?仟議壌強圭翠了崔頁wParam議互忖怏。SB_ENDSCROLL才SB_THUMBTRACK嶧連瓜策待。

壓殻會卆象辺欺議WM_VSCROLL嶧連柴麻竃仟議iVscrollPos峙朔?喘min才max崎栖距屁iVscrollPos?參鳩隠万壓恷寄峙嚥恷弌峙岻寂。殻會隼朔繍iVscrollPos嚥柵出GetScrollPos函誼議枠念了崔屢曳熟?泌惚壌強了崔窟伏阻延晒?夸聞喘SetScrollPos栖序佩厚仟?旺拝柵出InvalidateRect聞屁倖完笥涙丼。

InvalidateRect柵出恢伏匯倖WM_PAINT嶧連。SYSMETS1壓侃尖WM_PAINT嶧連扮?耽匯佩議y恫炎柴麻巷塀葎?

cyChar * i

壓SYSMETS2嶄?柴麻巷塀葎?

cyChar * (i - iVscrollPos)

儉桟挽隼?塋?NUMLINES佩猟忖?徽頁斤噐掲巣峙議iVscrollPos頁減方。殻會糞縞貧壓?塋焦瘕鰔塒睿塋蒋睾Ø鍔嶄弌5曳撮?Windows音氏?塋蒋睾Ú丕r魎貌祖始垉淡評産容圊繊?

念中傍狛?厘断匯蝕兵音?的誼湊鹸墫?宸劔議殻會旗鷹載惜継?丼楕載詰。和中厘断斤緩紗參俐個?徽頁枠勣深打壓WM_VSCROLL嶧連岻朔厚仟?塋焦瘕魑跳酬─?


AltStyle によって変換されたページ (->オリジナル) /