c++ - Modify the win32 window dragging/moving behavior -


i have child window in parent window. want child window not go out of parent border when drag , move child window.

here current working code in child's callback:

case wm_move:     rect rect = getlocalcoordinates(hwnd);     rect rectfather;     getwindowrect(hwndfather, &rectfather);     if (rect.left < 0)         rect.left = 0;     if (rect.top < 0)         rect.top = 0;     if (rect.bottom > rectfather.bottom - rectfather.top - 60)         rect.top = rectfather.bottom - rectfather.top - 341;     if (rect.right > rectfather.right - rectfather.left - 35)         rect.left = rectfather.right - rectfather.left - 110;     setwindowpos(hwnd, null,rect.left, rect.top, 0, 0, swp_nosize | swp_nozorder);     break;

the thing miss when dragging child window on parent border, child window keeps blinking.

it because child window first moved out of border, wm_move message triggers setwindowpos.

my question is: how prevent this, maybe overriding mouse drag event?

thanks rbmm, wm_windowposchanging message need. new working code:

case wm_windowposchanging:      windowpos *pos = (windowpos *)lparam;     rect rectfather;     getwindowrect(hwndfather, &rectfather);      if (pos->x < 0)         pos->x = 0;     if (pos->y < 0)         pos->y = 0;     if (pos->y > rectfather.bottom - rectfather.top - 341)         pos->y = rectfather.bottom - rectfather.top - 341;     if (pos->x > rectfather.right - rectfather.left - 110)         pos->x = rectfather.right - rectfather.left - 110;      break;

-

Comments

Post a Comment

Popular posts from this blog

python - How to insert QWidgets in the middle of a Layout? -

Image
i'm using qt framework build graphical user interface. use qgridlayout position qwidgets neatly. gui looks this: my application regularly adds new widgets gui @ runtime. these new widgets not added @ end of qlayout, somewhere in middle. the procedure bit cumbersome. applied on figure above, need take out widg_c , widg_d , ... qgridlayout. next, add widg_x and widg_y , , put other widgets again. how remove widgets qgridlayout: for in reversed(range(mygridlayout.count())): self.itemat(i).widget().setparent(none) ### as long you're dealing small amount of widgets, procedure not disaster. in application display lot of small widgets - perhaps 50 or more! application freezes second while procedure ongoing, annoying user. there way insert widgets somewhere in qlayout, without need take out other widgets? edit: apparently solution qvboxlayout simple. use function insertwidget(..) instead of addwidget(..) . docs can found link: http://doc.qt.io/qt-5/qboxlayou
Read more

python - serve multiple gunicorn django instances under nginx ubuntu -

i need serve 2 webs apps (django) on gunicorn under different domain names using nginx on ubuntu. started using tutorial: https://www.digitalocean.com/community/tutorials/how-to-set-up-django-with-postgres-nginx-and-gunicorn-on-ubuntu-16-04 it worked fine 1 using that. tried same thing second gives me 502 gateway second domain. tried following tutorial: http://michal.karzynski.pl/blog/2013/10/29/serving-multiple-django-applications-with-nginx-gunicorn-supervisor/ i'm @ part run gunicorn start script: sudo bin/gunicorn_start i response: starting webuildblack root traceback (most recent call last): file "/home/devin/webuildblack/bin/gunicorn", line 7, in <module> gunicorn.app.wsgiapp import run importerror: no module named 'gunicorn.app'; 'gunicorn' not package you have named program gunicorn.py gunicorn -package. rename file , remove gunicorn.pyc file.
Read more

module - Prestashop displayPaymentReturn hook url -

i new prestashop developer , trying create paymentmodule. have got show payment method can not proceed purchase because not know hot works. does know should redirect run hooddisplaypaymentreturn method? i happy if explain me complete navigation map make purchase. anyway, can find relation between hooks , pages? when have new module payment rely on simplest provided prestashop: bankwire. inside can find 3 hooks. hookpayment: public function hookpayment($params) { if (!$this->active) return; if (!$this->checkcurrency($params['cart'])) return; $this->smarty->assign(array( 'this_path' => $this->_path, 'this_path_bw' => $this->_path, 'this_path_ssl' => tools::getshopdomainssl(true, true).__ps_base_uri__.'modules/'.$this->name.'/' )); return $this->display(__file__, 'payment.tpl'); } hookdisplaypaymenteu: public fun
Read more