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// 9 october 2014
#define UNICODE
#define _UNICODE
#define STRICT
#define STRICT_TYPED_ITEMIDS
// get Windows version right; right now Windows XP
#define WINVER 0x0501
#define _WIN32_WINNT 0x0501
#define _WIN32_WINDOWS 0x0501 /* according to Microsoft's winperf.h */
#define _WIN32_IE 0x0600 /* according to Microsoft's sdkddkver.h */
#define NTDDI_VERSION 0x05010000 /* according to Microsoft's sdkddkver.h */
#include <windows.h>
#include <commctrl.h>
#include <stdint.h>
#include <uxtheme.h>
#include <string.h>
#include <wchar.h>
#include <windowsx.h>
#include <vsstyle.h>
#include <vssym32.h>
// #qo LIBS: user32 kernel32 gdi32
// TODO
// - investigate visual styles
// - put the client and non-client areas in the right place
// - make sure redrawing is correct (especially for backgrounds)
// - wine: BLACK_PEN draws a white line? (might change later so eh)
// - should the parent window appear deactivated?
// - switch to using Polyline()
HWND popover;
void xpanic(char *msg, DWORD err)
{
printf("%d | %s\n", err, msg);
abort();
}
#define ARROWHEIGHT 8
#define ARROWWIDTH 8 /* should be the same for smooth lines */
HRGN makePopoverRegion(HDC dc, LONG width, LONG height)
{
POINT pt;
HRGN region;
if (BeginPath(dc) == 0)
xpanic("error beginning path for Popover shape", GetLastError());
pt.x = 0;
pt.y = ARROWHEIGHT;
if (MoveToEx(dc, pt.x, pt.y, NULL) == 0)
xpanic("error moving to initial point in Popover shape", GetLastError());
pt.y += height - ARROWHEIGHT;
if (LineTo(dc, pt.x, pt.y) == 0)
xpanic("error drawing line 1 in Popover shape", GetLastError());
pt.x += width;
if (LineTo(dc, pt.x, pt.y) == 0)
xpanic("error drawing line 2 in Popover shape", GetLastError());
pt.y -= height - ARROWHEIGHT;
if (LineTo(dc, pt.x, pt.y) == 0)
xpanic("error drawing line 3 in Popover shape", GetLastError());
pt.x -= (width / 2) - ARROWWIDTH;
if (LineTo(dc, pt.x, pt.y) == 0)
xpanic("error drawing line 4 in Popover shape", GetLastError());
pt.x -= ARROWWIDTH;
pt.y -= ARROWHEIGHT;
if (LineTo(dc, pt.x, pt.y) == 0)
xpanic("error drawing line 5 in Popover shape", GetLastError());
pt.x -= ARROWWIDTH;
pt.y += ARROWHEIGHT;
if (LineTo(dc, pt.x, pt.y) == 0)
xpanic("error drawing line 6 in Popover shape", GetLastError());
pt.x = 0;
if (LineTo(dc, pt.x, pt.y) == 0)
xpanic("error drawing line 7 in Popover shape", GetLastError());
if (EndPath(dc) == 0)
xpanic("error ending path for Popover shape", GetLastError());
region = PathToRegion(dc);
return region;
}
LRESULT CALLBACK popoverproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
PAINTSTRUCT ps;
HDC dc;
HRGN region;
RECT r;
LONG width;
LONG height;
WINDOWPOS *wp;
switch (uMsg) {
case WM_NCPAINT:
if (GetWindowRect(hwnd, &r) == 0)
xpanic("error getting Popover window rect for shape redraw", GetLastError());
width = r.right - r.left;
height = r.bottom - r.top;
dc = GetWindowDC(hwnd);
// TODO error
region = makePopoverRegion(dc, width, height);
// TODO isolate the class brush to a constant
FillRgn(dc, region, GetSysColorBrush(COLOR_BTNFACE));
FrameRgn(dc, region, GetStockObject(BLACK_PEN), 1, 1);
DeleteObject(region);
ReleaseDC(hwnd, dc);
return 0;
case WM_WINDOWPOSCHANGED:
// this must be here; if it's in WM_NCPAINT weird things happen (see http://stackoverflow.com/questions/26288303/why-is-my-client-rectangle-drawing-behaving-bizarrely-pictures-provided-if-i-t)
wp = (WINDOWPOS *) lParam;
if ((wp->flags & SWP_NOSIZE) == 0) {
dc = GetWindowDC(hwnd);
// TODO error
region = makePopoverRegion(dc, wp->cx, wp->cy);
if (SetWindowRgn(hwnd, region, TRUE) == 0)
xpanic("error setting Popover shape", GetLastError());
// don't delete the region; the window manager owns it now
ReleaseDC(hwnd, dc);
}
break; // defer to DefWindowProc()
case WM_NCCALCSIZE:
{
RECT *r = (RECT *) lParam;
NCCALCSIZE_PARAMS *np = (NCCALCSIZE_PARAMS *) lParam;
if (wParam != FALSE)
r = &np->rgrc[0];
printf("%d | %d %d %d %d\n", wParam, r->left, r->top, r->right, r->bottom);
r->left++;
r->top++;
r->right--;
r->bottom--;
r->top += ARROWHEIGHT;
return 0;
}
case WM_PAINT:
/* dc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &r);
FillRect(dc, &r, GetSysColorBrush(COLOR_ACTIVECAPTION));
FrameRect(dc, &r, GetStockPen(WHITE_PEN));
EndPaint(hwnd, &ps);
*/ return 0;
}
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
LRESULT CALLBACK wndproc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
switch (uMsg) {
case WM_COMMAND:
if (HIWORD(wParam) == BN_CLICKED && LOWORD(wParam) == 100) {
MoveWindow(popover, 50, 50, 200, 200, TRUE);
ShowWindow(popover, SW_SHOW);
UpdateWindow(popover);
return 0;
}
break;
case WM_CLOSE:
PostQuitMessage(0);
return 0;
}
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
int main(int argc, char *argv[])
{
WNDCLASSW wc;
HWND mainwin, button;
MSG msg;
ZeroMemory(&wc, sizeof (WNDCLASSW));
wc.lpszClassName = L"popover";
wc.lpfnWndProc = popoverproc;
wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
wc.style = CS_DROPSHADOW | CS_NOCLOSE;
if (RegisterClassW(&wc) == 0)
abort();
popover = CreateWindowExW(WS_EX_TOPMOST,
L"popover", L"",
WS_POPUP,
0, 0, 150, 100,
NULL, NULL, NULL, NULL);
if (popover == NULL)
abort();
ZeroMemory(&wc, sizeof (WNDCLASSW));
wc.lpszClassName = L"mainwin";
wc.lpfnWndProc = wndproc;
wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
if (RegisterClassW(&wc) == 0)
abort();
mainwin = CreateWindowExW(0,
L"mainwin", L"Main Window",
WS_OVERLAPPEDWINDOW,
0, 0, 150, 100,
NULL, NULL, NULL, NULL);
if (mainwin == NULL)
abort();
button = CreateWindowExW(0,
L"button", L"Click Me",
BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE,
20, 20, 100, 40,
mainwin, (HMENU) 100, NULL, NULL);
if (button == NULL)
abort();
ShowWindow(mainwin, SW_SHOWDEFAULT);
if (UpdateWindow(mainwin) == 0)
abort();
while (GetMessageW(&msg, NULL, 0, 0) > 0) {
TranslateMessage(&msg);
DispatchMessageW(&msg);
}
return 0;
}
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