libui/new/windows/container.c

248 lines
7.0 KiB
C

// 26 april 2015
#include "uipriv_windows.h"
#define containerClass L"libui_uiContainerClass"
HWND initialParent;
struct container {
HWND hwnd;
uiContainer *parent;
int hidden;
};
// from https://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing and https://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
// this X value is really only for buttons but I don't see a better one :/
#define winXPadding 4
#define winYPadding 4
static void resize(uiContainer *cc, RECT *r)
{
struct container *c = (struct container *) (uiControl(cc)->Internal);
uiSizing d;
uiSizingSys sys;
HDC dc;
HFONT prevfont;
TEXTMETRICW tm;
SIZE size;
// TODO clean this up a bit
size.cx = 0;
size.cy = 0;
ZeroMemory(&tm, sizeof (TEXTMETRICW));
dc = GetDC(c->hwnd);
if (dc == NULL)
logLastError("error getting DC in resize()");
prevfont = (HFONT) SelectObject(dc, hMessageFont);
if (prevfont == NULL)
logLastError("error loading control font into device context in resize()");
if (GetTextMetricsW(dc, &tm) == 0)
logLastError("error getting text metrics in resize()");
if (GetTextExtentPoint32W(dc, L"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 52, &size) == 0)
logLastError("error getting text extent point in resize()");
sys.baseX = (int) ((size.cx / 26 + 1) / 2);
sys.baseY = (int) tm.tmHeight;
sys.internalLeading = tm.tmInternalLeading;
if (SelectObject(dc, prevfont) != hMessageFont)
logLastError("error restoring previous font into device context in resize()");
if (ReleaseDC(c->hwnd, dc) == 0)
logLastError("error releasing DC in resize()");
d.xPadding = uiDlgUnitsToX(winXPadding, sys.baseX);
d.yPadding = uiDlgUnitsToY(winYPadding, sys.baseY);
d.sys = &sys;
uiContainerResizeChildren(cc, r->left, r->top, r->right - r->left, r->bottom - r->top, &d);
}
static LRESULT CALLBACK containerWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
uiContainer *cc;
struct container *c;
CREATESTRUCTW *cs = (CREATESTRUCTW *) lParam;
WINDOWPOS *wp = (WINDOWPOS *) lParam;
RECT r;
cc = uiContainer(GetWindowLongPtrW(hwnd, GWLP_USERDATA));
if (cc == NULL)
if (uMsg == WM_NCCREATE)
SetWindowLongPtrW(hwnd, GWLP_USERDATA, (LONG_PTR) (cs->lpCreateParams));
// DO NOT RETURN DEFWINDOWPROC() HERE
// see the next block of comments as to why
// instead, we simply check if c == NULL again later
switch (uMsg) {
// these must always be run, even on the initial parent
// why? http://blogs.msdn.com/b/oldnewthing/archive/2010/03/16/9979112.aspx
// TODO
// these are only run if c is not NULL
case WM_WINDOWPOSCHANGED:
if ((wp->flags & SWP_NOSIZE) != 0)
break;
// fall through
case msgUpdateChild:
if (cc == NULL)
break;
c = (struct container *) (uiControl(cc)->Internal);
if (GetClientRect(c->hwnd, &r) == 0)
logLastError("error getting client rect for resize in parentWndProc()");
resize(cc, &r);
return 0;
}
return DefWindowProcW(hwnd, uMsg, wParam, lParam);
}
const char *initContainer(HICON hDefaultIcon, HCURSOR hDefaultCursor)
{
WNDCLASSW wc;
ZeroMemory(&wc, sizeof (WNDCLASSW));
wc.lpszClassName = containerClass;
wc.lpfnWndProc = containerWndProc;
wc.hInstance = hInstance;
wc.hIcon = hDefaultIcon;
wc.hCursor = hDefaultCursor;
wc.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
if (RegisterClassW(&wc) == 0)
return "registering uiContainer window class";
initialParent = CreateWindowExW(0,
containerClass, L"",
WS_OVERLAPPEDWINDOW,
0, 0,
100, 100,
NULL, NULL, hInstance, NULL);
if (initialParent == NULL)
return "creating initial parent window";
// just to be safe, disable the initial parent so it can't be interacted with accidentally
// if this causes issues for our controls, we can remove it
EnableWindow(initialParent, FALSE);
return NULL;
}
// subclasses override this and call back here when all children are destroyed
static void containerDestroy(uiControl *cc)
{
struct container *c = (struct container *) (cc->Internal);
if (c->parent != NULL)
complain("attempt to destroy uiContainer %p while it has a parent", cc);
if (DestroyWindow(c->hwnd) == 0)
logLastError("error destroying uiContainer window in containerDestroy()");
uiFree(c);
}
static uintptr_t containerHandle(uiControl *cc)
{
struct container *c = (struct container *) (cc->Internal);
return (uintptr_t) (c->hwnd);
}
static void containerSetParent(uiControl *cc, uiContainer *parent)
{
struct container *c = (struct container *) cc;
uiContainer *oldparent;
HWND newparent;
oldparent = c->parent;
c->parent = parent;
newparent = initialParent;
if (c->parent != NULL)
newparent = (HWND) uiControlHandle(uiControl(c->parent));
if (SetParent(c->hwnd, newparent) == 0)
logLastError("error changing uiContainer parent in containerSetParent()");
if (oldparent != NULL)
uiContainerUpdate(oldparent);
if (c->parent != NULL)
uiContainerUpdate(c->parent);
}
static void containerResize(uiControl *cc, intmax_t x, intmax_t y, intmax_t width, intmax_t height, uiSizing *d)
{
struct container *c = (struct container *) (cc->Internal);
if (MoveWindow(c->hwnd, x, y, width, height, TRUE) == 0)
logLastError("error resizing uiContainer in containerResize()");
}
static int containerVisible(uiControl *cc)
{
struct container *c = (struct container *) (cc->Internal);
return !c->hidden;
}
static void containerShow(uiControl *cc)
{
struct container *c = (struct container *) (cc->Internal);
ShowWindow(c->hwnd, SW_SHOW);
// hidden controls don't count in boxes and grids
if (c->parent != NULL)
uiContainerUpdate(c->parent);
c->hidden = 0;
}
static void containerHide(uiControl *cc)
{
struct container *c = (struct container *) (cc->Internal);
ShowWindow(c->hwnd, SW_HIDE);
if (c->parent != NULL)
uiContainerUpdate(c->parent);
c->hidden = 1;
}
static void containerEnable(uiControl *cc)
{
struct container *c = (struct container *) (cc->Internal);
EnableWindow(c->hwnd, TRUE);
}
static void containerDisable(uiControl *cc)
{
struct container *c = (struct container *) (cc->Internal);
EnableWindow(c->hwnd, FALSE);
}
static void containerUpdate(uiContainer *cc)
{
struct container *c = (struct container *) (uiControl(cc)->Internal);
SendMessageW(c->hwnd, msgUpdateChild, 0, 0);
}
void uiMakeContainer(uiContainer *cc)
{
struct container *c;
c = uiNew(struct container);
c->hwnd = CreateWindowExW(0,
containerClass, L"",
WS_CHILD | WS_VISIBLE,
0, 0,
100, 100,
initialParent, NULL, hInstance, cc);
if (c->hwnd == NULL)
logLastError("error creating uiContainer window in uiMakeContainer()");
uiControl(cc)->Internal = c;
uiControl(cc)->Destroy = containerDestroy;
uiControl(cc)->Handle = containerHandle;
uiControl(cc)->SetParent = containerSetParent;
// PreferredSize() is provided by subclasses
uiControl(cc)->Resize = containerResize;
uiControl(cc)->Visible = containerVisible;
uiControl(cc)->Show = containerShow;
uiControl(cc)->Hide = containerHide;
uiControl(cc)->Enable = containerEnable;
uiControl(cc)->Disable = containerDisable;
// ResizeChildren() is provided by subclasses
uiContainer(cc)->Update = containerUpdate;
}