81 lines
2.9 KiB
C++
81 lines
2.9 KiB
C++
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//-----------------------------------------------------------------------------
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// The Win32-based implementation of platform-dependent GUI functionality.
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//
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// Copyright 2018 whitequark
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//-----------------------------------------------------------------------------
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#include "solvespace.h"
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// Include after solvespace.h to avoid identifier clashes.
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#include <windows.h>
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namespace SolveSpace {
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namespace Platform {
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//-----------------------------------------------------------------------------
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// Windows API bridging
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//-----------------------------------------------------------------------------
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#define sscheck(expr) do { \
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SetLastError(0); \
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if(!(expr)) \
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CheckLastError(__FILE__, __LINE__, __func__, #expr); \
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} while(0)
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void CheckLastError(const char *file, int line, const char *function, const char *expr) {
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if(GetLastError() != S_OK) {
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LPWSTR messageW;
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FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
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NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
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(LPWSTR)&messageW, 0, NULL);
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std::string message;
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message += ssprintf("File %s, line %u, function %s:\n", file, line, function);
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message += ssprintf("Win32 API call failed: %s.\n", expr);
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message += ssprintf("Error: %s", Narrow(messageW).c_str());
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FatalError(message);
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}
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}
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//-----------------------------------------------------------------------------
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// Timers
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//-----------------------------------------------------------------------------
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class TimerImplWin32 : public Timer {
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public:
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static HWND WindowHandle() {
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static HWND hTimerWnd;
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if(hTimerWnd == NULL) {
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sscheck(hTimerWnd = CreateWindowExW(0, L"Message", NULL, 0, 0, 0, 0, 0,
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HWND_MESSAGE, NULL, NULL, NULL));
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}
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return hTimerWnd;
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}
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static void CALLBACK TimerFunc(HWND hwnd, UINT msg, UINT_PTR event, DWORD time) {
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sscheck(KillTimer(WindowHandle(), event));
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TimerImplWin32 *timer = (TimerImplWin32*)event;
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if(timer->onTimeout) {
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timer->onTimeout();
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}
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}
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void WindUp(unsigned milliseconds) override {
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// FIXME(platform/gui): use SetCoalescableTimer when it's available (8+)
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sscheck(SetTimer(WindowHandle(), (UINT_PTR)this,
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milliseconds, &TimerImplWin32::TimerFunc));
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}
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~TimerImplWin32() {
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// FIXME(platform/gui): there's a race condition here--WM_TIMER messages already
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// posted to the queue are not removed, so this destructor is at most "best effort".
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KillTimer(WindowHandle(), (UINT_PTR)this);
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}
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};
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TimerRef CreateTimer() {
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return std::unique_ptr<TimerImplWin32>(new TimerImplWin32);
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}
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}
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}
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