CreateWindowExを使用してListViewを作成し、クラス名としてWC_LISTVIEWを使用しました。WinAPI WC_LISTVIEWペイントの問題
スムーズなスクロールを作成しようとしています。リストが正しく描かれていないことを除いて、すべてが完全に機能します。リストのスクリーンショットの下を参照してください:
リストビューは、CreateWindowEx関数で次のスタイルを持っている:私は、ウィンドウをスクロールするためにタイマーを使用してい
WS_CHILD | WS_VISIBLE | LVS_REPORT | LVS_NOCOLUMNHEADER |
WS_TABSTOP | WS_BORDER | LVS_SHOWSELALWAYS | LVS_SINGLESEL | LVS_OWNERDRAWFIXED
。それは以下を行います:
ScrollWindowEx(
listHandle,
0,
step * linesDelta,
NULL,
NULL,
0, 0, 0
);
UpdateWindow(listHandle);
スクロールは塗り以外完全に動作します。
Iが試み:
UpdateWindow() - screenshootが接続されているすべての可能なオプションと
RedrawWindow - ウィンドウは一度しか描かれ
InvalidateRect + UpdateWindow = 2
と同じ
InvalidateRect + SendMessage(hwnd、WM_PAINT、0、0) - 2と同じ
リストについては、項目をペイントコードは以下の通りです:
LRESULT drawItem(HWND hwnd, DRAWITEMSTRUCT* drawStruct) {
Item *itemData = (Item *)drawStruct->itemData;
HDC hdc = drawStruct->hDC;
COLORREF backgroundColor;
COLORREF oldColor;
if (drawStruct->itemState & ODS_SELECTED || ListView_GetHotItem(hwnd) == drawStruct->itemID) {
backgroundColor = GetSysColor(COLOR_HIGHLIGHT);
oldColor = SetTextColor(hdc, GetSysColor(COLOR_HIGHLIGHTTEXT));
} else {
backgroundColor = RGB(255, 255, 255);
oldColor = SetTextColor(hdc, GetSysColor(COLOR_CAPTIONTEXT));
}
HBRUSH backgroundBrush = CreateSolidBrush(backgroundColor);
HBRUSH hOldBrush = (HBRUSH)SelectObject(hdc, backgroundBrush);
FillRect(hdc, &drawStruct->rcItem, backgroundBrush);
drawStruct->rcItem.left += 5;
drawStruct->rcItem.right -= 5;
drawStruct->rcItem.left += 30;
DrawText(hdc, itemData->path, -1, &drawStruct->rcItem,
DT_NOPREFIX | DT_SINGLELINE | DT_END_ELLIPSIS);
drawStruct->rcItem.left -= 30;
if (itemData->searchData && itemData->searchData->bitmap) {
HBITMAP bitmap = itemData->searchData->bitmap;
HDC hdcMem = CreateCompatibleDC(hdc);
HGDIOBJ oldBitmap = SelectObject(hdcMem, bitmap);
BITMAPINFO bi = { 0 };
bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
// Get the bitmap info header.
if (0 != GetDIBits(
hdcMem, // hdc
bitmap, // hbmp
0, // uStartScan
0, // cScanLines
NULL, // lpvBits
&bi,
DIB_RGB_COLORS
)) {
BLENDFUNCTION blendFunc;
blendFunc.BlendOp = AC_SRC_OVER;
blendFunc.BlendFlags = 0;
blendFunc.SourceConstantAlpha = 255;
blendFunc.AlphaFormat = AC_SRC_ALPHA;
AlphaBlend(hdc,
drawStruct->rcItem.left + 2, //dest X
drawStruct->rcItem.top + 3, //dest Y
bi.bmiHeader.biWidth,
bi.bmiHeader.biHeight,
hdcMem, 0, 0,
bi.bmiHeader.biWidth,
bi.bmiHeader.biHeight, blendFunc);
}
SelectObject(hdcMem, oldBitmap);
DeleteDC(hdcMem);
}
SelectObject(hdc, hOldBrush);
DeleteObject(backgroundBrush);
SetTextColor(hdc, oldColor);
return 0;
}
誰もがこのためのソリューションを知っていますか?
まったく同じ動作をしますゼロから作成完全な例は下記をご覧ください:
#include "stdafx.h"
#include "TestList.h"
#include <strsafe.h>
#include <commctrl.h>
#define MAX_LOADSTRING 100
#define ID_LIST_BOX 200
#define TIMER_ID_SMOOTH_SCROLL 100
class ListData {
int scrollToDelta;
int currentScrollPos;
int numPixelsToChangeScrollPos;
int numPixelsChanged;
public:
HWND listWindow;
WNDPROC defaultListProcedure;
void startSmoothScrolling(HWND hwnd, int delta) {
if (delta < 0) {
scrollToDelta = 100;
} else {
scrollToDelta = -100;
}
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_RANGE | SIF_POS;
if (GetScrollInfo(listWindow, SB_VERT, &si)) {
double count = SendMessage(listWindow, LVM_GETITEMCOUNT, 0, 0);
double totalHeight = count * 30;
currentScrollPos = (int)((totalHeight * (double)si.nPos)/(double)si.nMax);
numPixelsToChangeScrollPos = totalHeight/si.nMax;
numPixelsChanged = 0;
} else {
currentScrollPos = 0;
numPixelsChanged = 0;
numPixelsToChangeScrollPos = 30;
}
}
void smoothScroll(HWND listHandle) {
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_RANGE | SIF_POS;
DWORD linesDelta;
SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &linesDelta, 0);
if (scrollToDelta < 0) {
if (GetScrollInfo(listHandle, SB_VERT, &si)) {
if (si.nPos == 0) {
KillTimer(listHandle, TIMER_ID_SMOOTH_SCROLL);
return;
}
}
scrollToDelta += 5;
int step = -5;
if (scrollToDelta > -80) {
step = -4;
} else if (scrollToDelta > -60) {
step = -3;
} else if (scrollToDelta > -40) {
step = -3;
} else if (scrollToDelta > -20) {
step = -2;
}
numPixelsChanged += abs(step);
if (numPixelsChanged >= numPixelsToChangeScrollPos) {
int posDelta = numPixelsChanged/numPixelsToChangeScrollPos;
numPixelsChanged -= posDelta * numPixelsToChangeScrollPos;
si.nPos = si.nPos + posDelta;
si.fMask = SIF_POS;
SetScrollInfo(listHandle, SB_VERT, &si, TRUE);
}
ScrollWindowEx(
listHandle,
0,
step * linesDelta,
NULL,
NULL,
0, 0,
SW_INVALIDATE);
if (scrollToDelta >= 0) {
KillTimer(listHandle, TIMER_ID_SMOOTH_SCROLL);
}
} else {
if (GetScrollInfo(listHandle, SB_VERT, &si)) {
int pos = GetScrollPos(listHandle, SB_VERT);
if (pos == si.nMax) {
KillTimer(listHandle, TIMER_ID_SMOOTH_SCROLL);
return;
}
}
scrollToDelta -= 5;
int step = 5;
if (scrollToDelta > -80) {
step = 4;
} else if (scrollToDelta > -60) {
step = 3;
} else if (scrollToDelta > -40) {
step = 3;
} else if (scrollToDelta > -20) {
step = 2;
}
numPixelsChanged += abs(step);
if (numPixelsChanged >= numPixelsToChangeScrollPos) {
int posDelta = numPixelsChanged/numPixelsToChangeScrollPos;
numPixelsChanged -= posDelta * numPixelsToChangeScrollPos;
si.nPos = si.nPos - posDelta;
si.fMask = SIF_POS;
SetScrollInfo(listHandle, SB_VERT, &si, TRUE);
}
ScrollWindowEx(
listHandle,
0,
step * linesDelta,
NULL,
NULL,
0, 0, 0
);
if (scrollToDelta <= 0) {
KillTimer(listHandle, TIMER_ID_SMOOTH_SCROLL);
}
}
////////////////////////////////////////////////////////////////////////////////////////////////////
//RedrawWindow(listHandle, NULL, NULL,
// RDW_UPDATENOW | RDW_INTERNALPAINT | RDW_INVALIDATE | RDW_NOERASE | RDW_ALLCHILDREN | RDW_ERASENOW);
//InvalidateRect(listHandle, NULL, FALSE);
//SendMessage(listHandle, WM_PAINT, 0, 0);
UpdateWindow(listHandle);
//ListView_RedrawItems(listHandle, 0, 300);
////////////////////////////////////////////////////////////////////////////////////////////////////
}
};
struct Item {
WCHAR *name;
};
// Global Variables:
HINSTANCE hInst; // current instance
WCHAR szTitle[MAX_LOADSTRING]; // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
// Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// TODO: Place code here.
// Initialize global strings
StringCchCopy(szTitle, MAX_LOADSTRING, L"Test");
StringCchCopy(szWindowClass, MAX_LOADSTRING, L"TestClassList");
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_TESTLIST));
MSG msg;
// Main message loop:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_TESTLIST));
wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_TESTLIST);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassExW(&wcex);
}
LRESULT drawItem(HWND hwnd, DRAWITEMSTRUCT* drawStruct) {
Item *itemData = (Item *)drawStruct->itemData;
HDC hdc = drawStruct->hDC;
COLORREF backgroundColor;
//pcd->clrTextBk;
COLORREF oldColor;
if (drawStruct->itemState & ODS_SELECTED || ListView_GetHotItem(hwnd) == drawStruct->itemID) {
backgroundColor = GetSysColor(COLOR_HIGHLIGHT);
oldColor = SetTextColor(hdc, GetSysColor(COLOR_HIGHLIGHTTEXT));
} else {
backgroundColor = RGB(255, 255, 255);
oldColor = SetTextColor(hdc, GetSysColor(COLOR_CAPTIONTEXT));
}
HBRUSH backgroundBrush = CreateSolidBrush(backgroundColor);
HBRUSH hOldBrush = (HBRUSH)SelectObject(hdc, backgroundBrush);
FillRect(hdc, &drawStruct->rcItem, backgroundBrush);
drawStruct->rcItem.left += 5;
drawStruct->rcItem.right -= 5;
drawStruct->rcItem.left += 30;
DrawText(hdc, itemData->name, -1, &drawStruct->rcItem,
DT_NOPREFIX | DT_SINGLELINE | DT_END_ELLIPSIS);
drawStruct->rcItem.left -= 30;
SelectObject(hdc, hOldBrush);
DeleteObject(backgroundBrush);
SetTextColor(hdc, oldColor);
return 0;
}
LRESULT CALLBACK ListViewWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
switch (uMsg) {
////////////////////////////////////////////////////////////////////////////////////////////////////
case WM_TIMER: {
if (wParam == TIMER_ID_SMOOTH_SCROLL) {
ListData *listData = (ListData*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
listData->smoothScroll(hwnd);
}
break;
}
case WM_MOUSEWHEEL: {
int delta = HIWORD(wParam);
ListData *listData = (ListData*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
listData->startSmoothScrolling(hwnd, delta);
SetTimer(hwnd, TIMER_ID_SMOOTH_SCROLL, 200, NULL);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
default:
ListData *listData = (ListData*)GetWindowLongPtr(hwnd, GWLP_USERDATA);
return CallWindowProc(listData->defaultListProcedure, hwnd, uMsg, wParam, lParam);
}
return 0;
}
//
// FUNCTION: InitInstance(HINSTANCE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
hInst = hInstance; // Store instance handle in our global variable
HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
100, 100, 400, 400, nullptr, nullptr, hInstance, nullptr);
if (!hWnd) {
return FALSE;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
HWND listWindow = CreateWindowEx(
0,
WC_LISTVIEW,
L"",
WS_CHILD | WS_VISIBLE | LVS_REPORT | LVS_NOCOLUMNHEADER |
WS_TABSTOP | WS_BORDER | LVS_SHOWSELALWAYS | LVS_SINGLESEL | LVS_OWNERDRAWFIXED,
1, //x
1, //y
400 - 20, //width
400 - 20, //height
hWnd,
(HMENU)ID_LIST_BOX,
hInstance,
NULL);
ListData *listData = new ListData();
listData->listWindow = listWindow;
SetWindowLongPtr(listWindow, GWLP_USERDATA, (LPARAM)listData);
listData->defaultListProcedure = (WNDPROC)SetWindowLongPtr(listWindow, GWLP_WNDPROC, (LONG_PTR)ListViewWindowProc);
ListView_SetExtendedListViewStyle(listWindow, LVS_EX_FULLROWSELECT | LVS_EX_DOUBLEBUFFER | LVS_EX_AUTOSIZECOLUMNS);
SendMessage(listWindow, LVM_SETTEXTBKCOLOR, 0, 0xFFFFFF);
LVCOLUMN col;
col.mask = LVCF_TEXT | LVCF_WIDTH;
col.pszText = L"";
col.cx = 390;
SendMessage(listWindow, LVM_INSERTCOLUMN, 0, (LPARAM)&col);
LVITEM item;
item.mask = LVIF_PARAM | LVIF_TEXT;
item.iSubItem = 0;
for (int i = 0; i < 300; i++) {
item.iItem = i;
Item *itemData = (Item*)malloc(sizeof(Item));
WCHAR *name = (WCHAR*)malloc(sizeof(WCHAR) * 30);;
wsprintf(name, L"Item Name %d", i);
itemData->name = name;
item.pszText = name;
item.lParam = (LPARAM)itemData;
SendMessage(listWindow, LVM_INSERTITEM, 0, (LPARAM)&item);
}
////////////////////////////////////////////////////////////////////////////////////////////////////
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
//
// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message) {
case WM_DRAWITEM: {
////////////////////////////////////////////////////////////////////////////////////////////////////
if (wParam == ID_LIST_BOX) {
DRAWITEMSTRUCT *drawStruct = (DRAWITEMSTRUCT*)lParam;
drawItem(drawStruct->hwndItem, drawStruct);
return TRUE;
}
////////////////////////////////////////////////////////////////////////////////////////////////////
break;
}
case WM_PAINT: {
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code that uses hdc here...
EndPaint(hWnd, &ps);
}
break;
case WM_MEASUREITEM: {
if (wParam == ID_LIST_BOX) {
MEASUREITEMSTRUCT *measureStruct = (MEASUREITEMSTRUCT*)lParam;
measureStruct->itemHeight = 30;
measureStruct->itemWidth = 390;
return TRUE;
}
break;
}
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
あなたはWM_PAINTを送信することはありませんので、その考えを捨ててください。私たちは多くのコードを持っていません。おそらく、私たちが見ることができないコードには問題があります。 –
問題を再現する完全な例が含まれています。 – Andrei
「スムーズなスクロール」ホイールを再実装するのはなぜですか?ユーザーがこれを望む場合は、システムレベルでオンにすることができます。そして、*制御し続けることもできません。 –