A container widget that groups and lays out child controls.
Panel is a real child window of Deft's own window class — not a native
STATIC — so, unlike a bare static control, it forwards the WM_COMMAND and
WM_NOTIFY notifications its children raise. Without this, a button or list
placed inside a static container would never deliver its click/selection
events (the static control's window procedure drops them). A panel arranges
its children with a Sizer, making it the natural content host for a tab
page or any nested region.
WS_EX_CONTROLPARENT is set so the dialog manager tabs into the panel's
children — keyboard navigation reaches everything inside.
A container widget that groups and lays out child controls.
Panel is a real child window of Deft's own window class — not a native STATIC — so, unlike a bare static control, it forwards the WM_COMMAND and WM_NOTIFY notifications its children raise. Without this, a button or list placed inside a static container would never deliver its click/selection events (the static control's window procedure drops them). A panel arranges its children with a Sizer, making it the natural content host for a tab page or any nested region.
WS_EX_CONTROLPARENT is set so the dialog manager tabs into the panel's children — keyboard navigation reaches everything inside.