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sysdlg.h
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sysdlg.h
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/**
* Part of WinLamb - Win32 API Lambda Library
* https://github.com/rodrigocfd/winlamb
* Copyright 2017-present Rodrigo Cesar de Freitas Dias
* This library is released under the MIT License
*/
#pragma once
#include <algorithm>
#include <system_error>
#include "com.h"
#include "str.h"
#include "wnd.h"
#include <Shlobj.h>
#include "internals/sysdlg_priv.h"
namespace wl {
// Wrappers to system dialogs.
namespace sysdlg {
// Ordinary MessageBox, centered at parent.
inline int msgbox(HWND hParent, const std::wstring& title, const std::wstring& text, UINT uType = 0) {
if (hParent) { // the global hook will center the messagebox window on parent
_wli::sysdlg_priv::hWndParent.val = hParent;
_wli::sysdlg_priv::hHookMsgBox.val = SetWindowsHookExW(WH_CBT, [](int code, WPARAM wp, LPARAM lp) noexcept -> LRESULT {
// http://www.codeguru.com/cpp/w-p/win32/messagebox/print.php/c4541
if (code == HCBT_ACTIVATE) {
HWND hMsgbox = reinterpret_cast<HWND>(wp);
RECT rcMsgbox{}, rcParent{};
if (hMsgbox &&
_wli::sysdlg_priv::hWndParent.val &&
GetWindowRect(hMsgbox, &rcMsgbox) &&
GetWindowRect(_wli::sysdlg_priv::hWndParent.val, &rcParent))
{
RECT rcScreen{};
POINT pos{};
SystemParametersInfoW(SPI_GETWORKAREA, 0, static_cast<PVOID>(&rcScreen), 0); // size of desktop
// Adjusted x,y coordinates to message box window.
pos.x = rcParent.left + (rcParent.right - rcParent.left) / 2 - (rcMsgbox.right - rcMsgbox.left) / 2;
pos.y = rcParent.top + (rcParent.bottom - rcParent.top) / 2 - (rcMsgbox.bottom - rcMsgbox.top) / 2;
// Screen out-of-bounds corrections.
if (pos.x < 0) {
pos.x = 0;
} else if (pos.x + (rcMsgbox.right - rcMsgbox.left) > rcScreen.right) {
pos.x = rcScreen.right - (rcMsgbox.right - rcMsgbox.left);
}
if (pos.y < 0) {
pos.y = 0;
} else if (pos.y + (rcMsgbox.bottom - rcMsgbox.top) > rcScreen.bottom) {
pos.y = rcScreen.bottom - (rcMsgbox.bottom - rcMsgbox.top);
}
MoveWindow(hMsgbox, pos.x, pos.y,
rcMsgbox.right - rcMsgbox.left, rcMsgbox.bottom - rcMsgbox.top,
FALSE);
}
UnhookWindowsHookEx(_wli::sysdlg_priv::hHookMsgBox.val); // release global hook
}
return CallNextHookEx(nullptr, code, wp, lp);
}, nullptr, GetCurrentThreadId());
if (!_wli::sysdlg_priv::hHookMsgBox.val) {
throw std::system_error(GetLastError(), std::system_category(),
"SetWindowsHookEx failed for message box");
}
}
return MessageBoxW(hParent, text.c_str(), title.c_str(), uType);
}
// Ordinary MessageBox, centered at parent.
inline int msgbox(const wnd* parent, const std::wstring& title, const std::wstring& text, UINT uType = 0) {
return msgbox(parent->hwnd(), title, text, uType);
}
// System dialog to select one file to be opened.
inline bool open_file(HWND hParent, const wchar_t* filterWithPipes, std::wstring& buf) {
OPENFILENAME ofn{};
wchar_t tmpBuf[MAX_PATH]{};
std::vector<wchar_t> zfilter = _wli::sysdlg_priv::format_file_filter(filterWithPipes);
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hParent;
ofn.lpstrFilter = &zfilter[0];
ofn.lpstrFile = tmpBuf;
ofn.nMaxFile = ARRAYSIZE(tmpBuf);
ofn.Flags = OFN_EXPLORER | OFN_ENABLESIZING | OFN_FILEMUSTEXIST;// | OFN_HIDEREADONLY;
bool ret = GetOpenFileNameW(&ofn) != 0;
if (ret) buf = tmpBuf;
return ret;
}
// System dialog to select one file to be opened.
inline bool open_file(const wnd* parent, const wchar_t* filterWithPipes, std::wstring& buf) {
return open_file(parent->hwnd(), filterWithPipes, buf);
}
// System dialog to select many files to be opened.
inline bool open_files(HWND hParent, const wchar_t* filterWithPipes, std::vector<std::wstring>& arrBuf) {
OPENFILENAME ofn{};
std::vector<wchar_t> multiBuf(65536, L'\0'); // http://www.askjf.com/?q=2179s http://www.askjf.com/?q=2181s
std::vector<wchar_t> zfilter = _wli::sysdlg_priv::format_file_filter(filterWithPipes);
arrBuf.clear();
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hParent;
ofn.lpstrFilter = &zfilter[0];
ofn.lpstrFile = &multiBuf[0];
ofn.nMaxFile = static_cast<DWORD>(multiBuf.size()); // including terminating null
ofn.Flags = OFN_FILEMUSTEXIST | OFN_ALLOWMULTISELECT | OFN_EXPLORER | OFN_ENABLESIZING;
//ofn.FlagsEx = OFN_EX_NOPLACESBAR;
// Call to GetOpenFileName() causes "First-chance exception (KernelBase.dll): The RPC server is unavailable."
// in debug mode, but nothing else happens. The only way to get rid of it was using OFN_EX_NOPLACESBAR flag,
// don't know why!
if (!GetOpenFileNameW(&ofn)) {
DWORD err = CommDlgExtendedError();
if (err == FNERR_BUFFERTOOSMALL) {
throw std::system_error(err, std::system_category(),
"GetOpenFileName failed, buffer is too small");
}
return false;
}
std::vector<std::wstring> strs = str::split_multi_zero(&multiBuf[0]);
if (strs.empty()) {
throw std::runtime_error("GetOpenFileName didn't return multiple strings.");
}
if (strs.size() == 1) { // if user selected only 1 file, the string is the full path, and that's all
arrBuf.emplace_back(strs[0]);
} else { // user selected 2 or more files
std::wstring& basePath = strs[0]; // 1st string is the base path; others are the filenames
arrBuf.resize(strs.size() - 1); // alloc return buffer
for (size_t i = 0; i < strs.size() - 1; ++i) {
arrBuf[i].reserve(basePath.length() + strs[i + 1].size() + 1); // room for backslash
arrBuf[i] = basePath;
arrBuf[i].append(L"\\").append(strs[i + 1]); // concat folder + file
}
std::sort(arrBuf.begin(), arrBuf.end());
}
return true;
}
// System dialog to select many files to be opened.
inline bool open_files(const wnd* parent, const wchar_t* filterWithPipes, std::vector<std::wstring>& arrBuf) {
return open_files(parent->hwnd(), filterWithPipes, arrBuf);
}
// System dialog to select where one file will be saved.
inline bool save_file(HWND hParent, const wchar_t* filterWithPipes, std::wstring& buf, const std::wstring& defFile) {
OPENFILENAME ofn{};
wchar_t tmpBuf[MAX_PATH]{};
std::vector<wchar_t> zfilter = _wli::sysdlg_priv::format_file_filter(filterWithPipes);
if (!defFile.empty()) lstrcpyW(tmpBuf, defFile.c_str());
ofn.lStructSize = sizeof(ofn);
ofn.hwndOwner = hParent;
ofn.lpstrFilter = &zfilter[0];
ofn.lpstrFile = tmpBuf;
ofn.nMaxFile = ARRAYSIZE(tmpBuf);
ofn.Flags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
ofn.lpstrDefExt = L"txt"; // apparently could be anything, will just force append of combo selected extension
bool ret = GetSaveFileNameW(&ofn) != 0;
if (ret) buf = tmpBuf;
return ret;
}
// System dialog to select where one file will be saved.
inline bool save_file(const wnd* parent, const wchar_t* filterWithPipes, std::wstring& buf, const std::wstring& defFile) {
return save_file(parent->hwnd(), filterWithPipes, buf, defFile);
}
// System dialog to select one folder.
inline bool choose_folder(HWND hParent, std::wstring& buf) {
com::lib comLib{com::lib::init::NOW};
//LPITEMIDLIST pidlRoot = 0;
//if (defFolder) SHParseDisplayName(defFolder, nullptr, &pidlRoot, 0, nullptr);
BROWSEINFOW bi{};
bi.hwndOwner = hParent;
bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_NEWDIALOGSTYLE;
PIDLIST_ABSOLUTE pidl = SHBrowseForFolderW(&bi);
if (!pidl) return false; // user cancelled
wchar_t tmpbuf[MAX_PATH]{};
if (!SHGetPathFromIDListW(pidl, tmpbuf)) {
throw std::runtime_error("SHGetPathFromIDList failed.");
}
buf = tmpbuf;
return true;
}
// System dialog to select one folder.
inline bool choose_folder(const wnd* parent, std::wstring& buf) {
return choose_folder(parent->hwnd(), buf);
}
}//namespace sysdlg
}//namespace wl