static LRESULT CALLBACK groupSubProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{
uiGroup *g = uiGroup(dwRefData);
WINDOWPOS *wp = (WINDOWPOS *) lParam;
MINMAXINFO *mmi = (MINMAXINFO *) lParam;
int minwid, minht;
LRESULT lResult;
if (handleParentMessages(hwnd, uMsg, wParam, lParam, &lResult) != FALSE)
return lResult;
switch (uMsg) {
case WM_WINDOWPOSCHANGED:
if ((wp->flags & SWP_NOSIZE) != 0)
break;
groupRelayout(g);
return 0;
case WM_GETMINMAXINFO:
lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
uiWindowsControlMinimumSize(uiWindowsControl(g), &minwid, &minht);
mmi->ptMinTrackSize.x = minwid;
mmi->ptMinTrackSize.y = minht;
return lResult;
case WM_NCDESTROY:
if (RemoveWindowSubclass(hwnd, groupSubProc, uIdSubclass) == FALSE)
logLastError(L"error removing groupbox subclass");
break;
}
return DefSubclassProc(hwnd, uMsg, wParam, lParam);
}
static void uiFormMinimumSize(uiWindowsControl *c, int *width, int *height)
{
uiForm *f = uiForm(c);
int xpadding, ypadding;
int nStretchy;
// these two contain the largest minimum width and height of all stretchy controls in the form
// all stretchy controls will use this value to determine the final minimum size
int maxLabelWidth, maxControlWidth;
int maxStretchyHeight;
int labelwid;
int i;
int minimumWidth, minimumHeight;
int nVisible;
uiWindowsSizing sizing;
*width = 0;
*height = 0;
if (f->controls->size() == 0)
return;
// 0) get this Form's padding
formPadding(f, &xpadding, &ypadding);
// 1) determine the longest width of all controls and labels; add in the height of non-stretchy controls and get (but not add in) the largest heights of stretchy controls
// we still add in like direction of stretchy controls
nStretchy = 0;
maxLabelWidth = 0;
maxControlWidth = 0;
maxStretchyHeight = 0;
nVisible = 0;
for (const struct formChild &fc : *(f->controls)) {
if (!uiControlVisible(fc.c))
continue;
nVisible++;
labelwid = uiWindowsWindowTextWidth(fc.label);
if (maxLabelWidth < labelwid)
maxLabelWidth = labelwid;
uiWindowsControlMinimumSize(uiWindowsControl(fc.c), &minimumWidth, &minimumHeight);
if (fc.stretchy) {
nStretchy++;
if (maxStretchyHeight < minimumHeight)
maxStretchyHeight = minimumHeight;
}
if (maxControlWidth < minimumWidth)
maxControlWidth = minimumWidth;
if (!fc.stretchy)
*height += minimumHeight;
}
if (nVisible == 0) // nothing to show; return 0x0
return;
*width += maxLabelWidth + maxControlWidth;
// 2) outset the desired rect with the needed padding
*width += xpadding;
*height += (nVisible - 1) * ypadding;
// 3) and now we can add in stretchy controls
*height += nStretchy * maxStretchyHeight;
}
static LRESULT CALLBACK windowWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
LONG_PTR ww;
uiWindow *w;
CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
WINDOWPOS *wp = (WINDOWPOS *) lParam;
MINMAXINFO *mmi = (MINMAXINFO *) lParam;
intmax_t width, height;
LRESULT lResult;
ww = GetWindowLongPtrW(hwnd, GWLP_USERDATA);
if (ww == 0) {
if (uMsg == WM_CREATE)
SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR) (cs->lpCreateParams));
// fall through to DefWindowProc() anyway
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
w = uiWindow((void *) ww);
if (handleParentMessages(hwnd, uMsg, wParam, lParam, &lResult) != FALSE)
return lResult;
switch (uMsg) {
case WM_COMMAND:
// not a menu
if (lParam != 0)
break;
if (HIWORD(wParam) != 0)
break;
runMenuEvent(LOWORD(wParam), uiWindow(w));
return 0;
case WM_WINDOWPOSCHANGED:
if ((wp->flags & SWP_NOSIZE) != 0)
break;
windowRelayout(w);
return 0;
case WM_GETMINMAXINFO:
// ensure the user cannot resize the window smaller than its minimum size
lResult = DefWindowProcW(hwnd, uMsg, wParam, lParam);
uiWindowsControlMinimumSize(uiWindowsControl(w), &width, &height);
// width and height are in client coordinates; ptMinTrackSize is in window coordinates
clientSizeToWindowSize(w->hwnd, &width, &height, w->hasMenubar);
mmi->ptMinTrackSize.x = width;
mmi->ptMinTrackSize.y = height;
return lResult;
case WM_PRINTCLIENT:
// we do no special painting; just erase the background
// don't worry about the return value; we let DefWindowProcW() handle this message
SendMessageW(hwnd, WM_ERASEBKGND, wParam, lParam);
return 0;
case WM_CLOSE:
if ((*(w->onClosing))(w, w->onClosingData))
uiControlDestroy(uiControl(w));
return 0; // we destroyed it already
}
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
BOOL uiWindowsControlTooSmall(uiWindowsControl *c)
{
RECT r;
int width, height;
uiWindowsControlLayoutRect(c, &r);
uiWindowsControlMinimumSize(c, &width, &height);
if ((r.right - r.left) < width)
return TRUE;
if ((r.bottom - r.top) < height)
return TRUE;
return FALSE;
}
static void uiWindowMinimumSize(uiWindowsControl *c, intmax_t *width, intmax_t *height)
{
uiWindow *w = uiWindow(c);
uiWindowsSizing sizing;
int mx, my;
*width = 0;
*height = 0;
if (w->child != NULL)
uiWindowsControlMinimumSize(uiWindowsControl(w->child), width, height);
windowMargins(w, &mx, &my);
*width += 2 * mx;
*height += 2 * my;
}
// this cannot queue a resize because it's called by the resize handler
void ensureMinimumWindowSize(uiWindow *w)
{
intmax_t width, height;
RECT r;
uiWindowsControlMinimumSize(uiWindowsControl(w), &width, &height);
uiWindowsEnsureGetClientRect(w->hwnd, &r);
if (width < (r.right - r.left)) // preserve width if larger
width = r.right - r.left;
if (height < (r.bottom - r.top)) // preserve height if larger
height = r.bottom - r.top;
clientSizeToWindowSize(w->hwnd, &width, &height, w->hasMenubar);
if (SetWindowPos(w->hwnd, NULL, 0, 0, width, height, SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOOWNERZORDER | SWP_NOZORDER) == 0)
logLastError(L"error resizing window");
}
static void uiGroupMinimumSize(uiWindowsControl *c, int *width, int *height)
{
uiGroup *g = uiGroup(c);
int mx, mtop, mbottom;
int labelWidth;
*width = 0;
*height = 0;
if (g->child != NULL)
uiWindowsControlMinimumSize(uiWindowsControl(g->child), width, height);
labelWidth = uiWindowsWindowTextWidth(g->hwnd);
if (*width < labelWidth) // don't clip the label; it doesn't ellipsize
*width = labelWidth;
groupMargins(g, &mx, &mtop, &mbottom);
*width += 2 * mx;
*height += mtop + mbottom;
}
static void formRelayout(uiForm *f)
{
RECT r;
int x, y, width, height;
int xpadding, ypadding;
int nStretchy;
int labelwid, stretchyht;
int thiswid;
int i;
int minimumWidth, minimumHeight;
uiWindowsSizing sizing;
int labelht, labelyoff;
int nVisible;
if (f->controls->size() == 0)
return;
uiWindowsEnsureGetClientRect(f->hwnd, &r);
x = r.left;
y = r.top;
width = r.right - r.left;
height = r.bottom - r.top;
// 0) get this Form's padding
formPadding(f, &xpadding, &ypadding);
// 1) get width of labels and height of non-stretchy controls
// this will tell us how much space will be left for controls
labelwid = 0;
stretchyht = height;
nStretchy = 0;
nVisible = 0;
for (struct formChild &fc : *(f->controls)) {
if (!uiControlVisible(fc.c)) {
ShowWindow(fc.label, SW_HIDE);
continue;
}
ShowWindow(fc.label, SW_SHOW);
nVisible++;
thiswid = uiWindowsWindowTextWidth(fc.label);
if (labelwid < thiswid)
labelwid = thiswid;
if (fc.stretchy) {
nStretchy++;
continue;
}
uiWindowsControlMinimumSize(uiWindowsControl(fc.c), &minimumWidth, &minimumHeight);
fc.height = minimumHeight;
stretchyht -= minimumHeight;
}
if (nVisible == 0) // nothing to do
return;
// 2) inset the available rect by the needed padding
width -= xpadding;
height -= (nVisible - 1) * ypadding;
stretchyht -= (nVisible - 1) * ypadding;
// 3) now get the width of controls and the height of stretchy controls
width -= labelwid;
if (nStretchy != 0) {
stretchyht /= nStretchy;
for (struct formChild &fc : *(f->controls)) {
if (!uiControlVisible(fc.c))
continue;
if (fc.stretchy)
fc.height = stretchyht;
}
}
// 4) get the y offset
labelyoff = labelYOffset;
uiWindowsGetSizing(f->hwnd, &sizing);
uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, &labelyoff);
// 5) now we can position controls
// first, make relative to the top-left corner of the container
// also prefer left alignment on Windows
x = labelwid + xpadding;
y = 0;
for (const struct formChild &fc : *(f->controls)) {
if (!uiControlVisible(fc.c))
continue;
labelht = labelHeight;
uiWindowsGetSizing(f->hwnd, &sizing);
uiWindowsSizingDlgUnitsToPixels(&sizing, NULL, &labelht);
uiWindowsEnsureMoveWindowDuringResize(fc.label, 0, y + labelyoff - sizing.InternalLeading, labelwid, labelht);
uiWindowsEnsureMoveWindowDuringResize((HWND) uiControlHandle(fc.c), x, y, width, fc.height);
y += fc.height + ypadding;
}
}