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ScrollView.cpp
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ScrollView.cpp
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////////////////////////////////////////////////////////////////////////////
// ScrollView.cpp -- MZC3 scroll view
// This file is part of MZC3. See file "ReadMe.txt" and "License.txt".
////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#ifdef MZC_NO_INLINING
#undef MZC_INLINE
#define MZC_INLINE /*empty*/
#include "ScrollView_inl.hpp"
#endif
////////////////////////////////////////////////////////////////////////////
void MScrollView::SetCtrlInfo(HWND hwndCtrl, const MRect& rcCtrl)
{
assert(::IsWindow(hwndCtrl));
assert(HasChildStyle(hwndCtrl));
assert(rcCtrl.left >= 0);
assert(rcCtrl.top >= 0);
MScrollCtrlInfo* info = FindCtrlInfo(hwndCtrl);
if (info)
info->m_rcCtrl = rcCtrl;
else
AddCtrlInfo(hwndCtrl, rcCtrl);
}
void MScrollView::SetCtrlInfo(
HWND hwndCtrl, const MPoint& ptCtrl, const MSize& sizCtrl)
{
assert(::IsWindow(hwndCtrl));
assert(HasChildStyle(hwndCtrl));
assert(ptCtrl.x >= 0);
assert(ptCtrl.y >= 0);
MScrollCtrlInfo* info = FindCtrlInfo(hwndCtrl);
if (info)
info->m_rcCtrl = MRect(ptCtrl, sizCtrl);
else
AddCtrlInfo(hwndCtrl, ptCtrl, sizCtrl);
}
MScrollCtrlInfo* MScrollView::FindCtrlInfo(HWND hwndCtrl)
{
assert(::IsWindow(hwndCtrl));
assert(HasChildStyle(hwndCtrl));
size_t siz = size();
for (size_t i = 0; i < siz; ++i)
{
if (m_vecInfo[i].m_hwndCtrl == hwndCtrl)
return &m_vecInfo[i];
}
return NULL;
}
const MScrollCtrlInfo* MScrollView::FindCtrlInfo(HWND hwndCtrl) const
{
assert(::IsWindow(hwndCtrl));
assert(HasChildStyle(hwndCtrl));
size_t siz = size();
for (size_t i = 0; i < siz; ++i)
{
if (m_vecInfo[i].m_hwndCtrl == hwndCtrl)
return &m_vecInfo[i];
}
return NULL;
}
void MScrollView::RemoveCtrlInfo(HWND hwndCtrl)
{
assert(::IsWindow(hwndCtrl));
assert(HasChildStyle(hwndCtrl));
std::vector<MScrollCtrlInfo>::iterator it, end = m_vecInfo.end();
for (it = m_vecInfo.begin(); it != end; ++it)
{
if (it->m_hwndCtrl == hwndCtrl)
{
m_vecInfo.erase(it);
break;
}
}
}
/*virtual*/ void MScrollView::GetClientRect(LPRECT prcClient) const
{
assert(prcClient);
::GetClientRect(m_hwndParent, prcClient);
}
// ensure visible
void MScrollView::EnsureCtrlVisible(HWND hwndCtrl, bool update_all/* = true*/)
{
MRect rcClient;
MScrollView::GetClientRect(&rcClient);
const int siz = static_cast<int>(size());
for (int i = 0; i < siz; ++i)
{
if (m_vecInfo[i].m_hwndCtrl != hwndCtrl)
continue;
if (!::IsWindow(hwndCtrl))
break;
MRect& rcCtrl = m_vecInfo[i].m_rcCtrl;
if (rcCtrl.bottom > m_ptScrollPos.y + rcClient.Height())
{
m_ptScrollPos.y = rcCtrl.bottom - rcClient.Height();
}
if (rcCtrl.top < m_ptScrollPos.y)
{
m_ptScrollPos.y = rcCtrl.top;
}
break;
}
if (update_all)
UpdateAll();
}
void MScrollView::SetExtentForAllCtrls()
{
Extent().cx = Extent().cy = 0;
const int siz = static_cast<int>(size());
for (int i = 0; i < siz; ++i)
{
if (!::IsWindowVisible(m_vecInfo[i].m_hwndCtrl))
continue;
MRect& rcCtrl = m_vecInfo[i].m_rcCtrl;
if (Extent().cx < rcCtrl.right - 1)
Extent().cx = rcCtrl.right - 1;
if (Extent().cy < rcCtrl.bottom - 1)
Extent().cy = rcCtrl.bottom - 1;
}
}
// TODO: Avoid flickering!
void MScrollView::UpdateScrollInfo()
{
MRect rcClient;
MScrollView::GetClientRect(&rcClient);
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
si.nMin = 0;
si.nMax = Extent().cx;
si.nPage = rcClient.Width();
if (static_cast<UINT>(si.nMax) < si.nPage)
ScrollPos().x = 0;
si.nPos = ScrollPos().x;
SetHScrollInfo(&si, TRUE);
si.cbSize = sizeof(si);
si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
si.nMin = 0;
si.nMax = Extent().cy;
si.nPage = rcClient.Height();
if (static_cast<UINT>(si.nMax) < si.nPage)
ScrollPos().y = 0;
si.nPos = ScrollPos().y;
SetVScrollInfo(&si, TRUE);
::InvalidateRect(m_hwndParent, NULL, TRUE);
}
void MScrollView::UpdateCtrlsPos()
{
const int siz = static_cast<int>(size());
HDWP hDWP = ::BeginDeferWindowPos(siz);
if (hDWP)
{
for (int i = 0; i < siz; ++i)
{
MRect& rcCtrl = m_vecInfo[i].m_rcCtrl;
::DeferWindowPos(hDWP, m_vecInfo[i].m_hwndCtrl,
NULL,
rcCtrl.left - ScrollPos().x, rcCtrl.top - ScrollPos().y,
rcCtrl.Width(), rcCtrl.Height(),
SWP_NOACTIVATE | SWP_NOZORDER | SWP_NOCOPYBITS);
}
::EndDeferWindowPos(hDWP);
}
}
void MScrollView::HScroll(int nSB_, int nPos)
{
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetHScrollInfo(&si);
switch (nSB_)
{
case SB_TOP:
SetHScrollPos(0);
break;
case SB_BOTTOM:
SetHScrollPos(si.nMax - si.nPage);
break;
case SB_LINELEFT:
SetHScrollPos(si.nPos - 16);
break;
case SB_LINERIGHT:
SetHScrollPos(si.nPos + 16);
break;
case SB_PAGELEFT:
SetHScrollPos(si.nPos - si.nPage);
break;
case SB_PAGERIGHT:
SetHScrollPos(si.nPos + si.nPage);
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
SetHScrollPos(nPos);
break;
}
ScrollPos().x = GetHScrollPos();
UpdateAll();
}
void MScrollView::VScroll(int nSB_, int nPos)
{
SCROLLINFO si;
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
GetVScrollInfo(&si);
switch (nSB_)
{
case SB_TOP:
SetVScrollPos(0);
break;
case SB_BOTTOM:
SetVScrollPos(si.nMax - si.nPage);
break;
case SB_LINELEFT:
SetVScrollPos(si.nPos - 16);
break;
case SB_LINERIGHT:
SetVScrollPos(si.nPos + 16);
break;
case SB_PAGELEFT:
SetVScrollPos(si.nPos - si.nPage);
break;
case SB_PAGERIGHT:
SetVScrollPos(si.nPos + si.nPage);
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
SetVScrollPos(nPos);
break;
}
ScrollPos().y = GetVScrollPos();
UpdateAll();
}
////////////////////////////////////////////////////////////////////////////
#ifdef SCROLLVIEW_UNITTEST
HINSTANCE g_hInstance = NULL;
HWND g_hMainWnd = NULL;
MScrollView g_sv;
std::vector<HWND> g_ahwndCtrls;
const int c_nCtrls = 100;
const int c_height = 25;
bool g_bInited = false;
static const LPCTSTR s_pszName = TEXT("MZC3 ScrollView Test");
void OnSize(HWND hWnd)
{
if (!g_bInited)
return;
g_sv.clear();
MRect rcClient;
::GetClientRect(hWnd, &rcClient);
for (int i = 0; i < c_nCtrls; ++i)
{
MRect rcCtrl(MPoint(0, c_height * i),
MSize(rcClient.Width(), c_height));
g_sv.AddCtrlInfo(g_ahwndCtrls[i], rcCtrl);
}
g_sv.SetExtentForAllCtrls();
g_sv.UpdateAll();
}
BOOL OnCreate(HWND hWnd)
{
g_sv.SetParent(hWnd);
g_sv.ShowScrollBars(FALSE, TRUE);
HWND hwndCtrl;
TCHAR sz[32];
for (int i = 0; i < c_nCtrls; ++i)
{
::wsprintf(sz, TEXT("%d"), i);
#if 1
// text box
hwndCtrl = ::CreateWindowEx(
WS_EX_CLIENTEDGE,
TEXT("EDIT"), sz,
WS_CHILD | WS_VISIBLE | WS_BORDER | ES_AUTOHSCROLL,
0, 0, 0, 0, hWnd, NULL, g_hInstance, NULL);
#else
// button
hwndCtrl = ::CreateWindowEx(
0,
TEXT("BUTTON"), sz,
WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_TEXT | BS_CENTER | BS_VCENTER,
0, 0, 0, 0, hWnd, NULL, g_hInstance, NULL);
#endif
if (hwndCtrl == NULL)
return FALSE;
::SendMessage(hwndCtrl, WM_SETFONT,
reinterpret_cast<WPARAM>(::GetStockObject(DEFAULT_GUI_FONT)),
FALSE);
g_ahwndCtrls.emplace_back(hwndCtrl);
}
g_bInited = true;
OnSize(hWnd);
return TRUE;
}
void OnDestroy(HWND hWnd)
{
for (int i = 0; i < c_nCtrls; ++i)
{
::DestroyWindow(g_ahwndCtrls[i]);
}
::PostQuitMessage(0);
}
LRESULT CALLBACK
WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg)
{
case WM_CREATE:
return OnCreate(hWnd) ? 0 : -1;
case WM_DESTROY:
OnDestroy(hWnd);
break;
case WM_SIZE:
OnSize(hWnd);
break;
case WM_HSCROLL:
g_sv.HScroll(LOWORD(wParam), HIWORD(wParam));
break;
case WM_VSCROLL:
g_sv.VScroll(LOWORD(wParam), HIWORD(wParam));
break;
default:
return ::DefWindowProc(hWnd, uMsg, wParam, lParam);
}
return 0;
}
extern "C"
int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
g_hInstance = hInstance;
WNDCLASS wc;
ZeroMemory(&wc, sizeof(wc));
wc.style = 0;
wc.lpfnWndProc = WindowProc;
wc.hInstance = hInstance;
wc.hIcon = ::LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = ::LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = reinterpret_cast<HBRUSH>(
static_cast<LONG_PTR>(COLOR_3DFACE + 1));
wc.lpszClassName = s_pszName;
if (!::RegisterClass(&wc))
{
return 1;
}
g_hMainWnd = ::CreateWindow(s_pszName, s_pszName,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL);
if (g_hMainWnd == NULL)
{
return 2;
}
::ShowWindow(g_hMainWnd, nCmdShow);
::UpdateWindow(g_hMainWnd);
MSG msg;
while (::GetMessage(&msg, NULL, 0, 0))
{
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
return static_cast<int>(msg.wParam);
}
#endif // def SCROLLVIEW_UNITTEST
////////////////////////////////////////////////////////////////////////////