void Control::SetParent(Control *newParent)
{
HwndWrapper *prevRoot = NULL;
if (parent)
prevRoot = GetRootHwndWnd(parent);
HwndWrapper *newRoot = GetRootHwndWnd(newParent);
CrashIf(!newRoot);
parent = newParent;
if (prevRoot)
UnRegisterEventHandlers(prevRoot->evtMgr);
RegisterEventHandlers(newRoot->evtMgr);
}
// note: all derived classes must call Control::NotifyMouseLeave()
// from their own NotifyMouseLeave().
void Control::NotifyMouseLeave()
{
// hide url tooltip
HwndWrapper *hw = GetRootHwndWnd(this);
HWND hwndParent = hw->hwndParent;
ClearInfotip(hwndParent);
}
// traverse tree upwards to find HWND that is ultimately backing
// this window
HWND GetHwndParent(const Control *c)
{
HwndWrapper *wHwnd = GetRootHwndWnd(c);
if (wHwnd)
return wHwnd->hwndParent;
return NULL;
}
Control::~Control()
{
delete layout;
DeleteVecMembers(children);
if (!parent)
return;
HwndWrapper *root = GetRootHwndWnd(parent);
CrashIf(!root);
UnRegisterEventHandlers(root->evtMgr);
}
// note: all derived classes must call Control::NotifyMouseEnter()
// from their own NotifyMouseEnter().
void Control::NotifyMouseEnter()
{
// show url as a tooltip
HwndWrapper *hw = GetRootHwndWnd(this);
HWND hwndParent = hw->hwndParent;
int x = 0, y = 0;
MapMyToRootPos(x, y);
RECT pos = { x, y, 0, 0 };
pos.right = x + this->pos.Width;
pos.bottom = y + this->pos.Height;
CreateInfotipForLink(hwndParent, toolTip, pos);
}
void Control::SetPosition(const Rect& p)
{
if (p.Equals(pos))
return; // perf optimization
bool sizeChanged = (p.Width != pos.Width) || (p.Height != pos.Height);
// when changing position we need to invalidate both
// before and after position
// TODO: not sure why I need this, but without it there
// are drawing artifacts
Rect p1(p); p1.Inflate(1,1);
Rect p2(pos); p2.Inflate(1,1);
RequestRepaint(this, &p1, &p2);
pos = p;
if (!sizeChanged)
return;
HwndWrapper *hwnd = GetRootHwndWnd(this);
hwnd->evtMgr->NotifySizeChanged(this, p.Width, p.Height);
}
// r1 and r2 are relative to w. If both are NULL, we invalidate the whole w
void RequestRepaint(Control *c, const Rect *r1, const Rect *r2)
{
// we might be called when the control hasn't yet been
// placed in the window hierarchy
if (!c->parent)
return;
Rect wRect(0, 0, c->pos.Width, c->pos.Height);
int offX = 0, offY = 0;
c->MapMyToRootPos(offX, offY);
while (c->parent) {
c = c->parent;
}
HWND hwnd = c->hwndParent;
CrashIf(!hwnd);
HwndWrapper *wnd = GetRootHwndWnd(c);
if (wnd)
wnd->RequestRepaint();
// if we have r1 or r2, invalidate those, else invalidate w
bool didInvalidate = false;
if (r1) {
InvalidateAtOff(hwnd, r1, offX, offY);
didInvalidate = true;
}
if (r2) {
InvalidateAtOff(hwnd, r2, offX, offY);
didInvalidate = true;
}
if (didInvalidate)
return;
InvalidateAtOff(hwnd, &wRect, offX, offY);
}
void RequestLayout(Control *c)
{
HwndWrapper *wnd = GetRootHwndWnd(c);
if (wnd)
wnd->RequestLayout();
}
