MsgRouting
AwtScrollbar::HandleEvent(MSG *msg, BOOL synthetic)
{
// SCROLLBAR control doesn't cause activation on mouse/key events,
// so we can safely (for synthetic focus) pass them to the system proc.
if (IsFocusingMouseMessage(msg)) {
// Left button press was already routed to default window
// procedure in the WmMouseDown above. Propagating synthetic
// press seems like a bad idea as internal message loop
// doesn't know how to unwrap synthetic release.
delete msg;
return mrConsume;
}
return AwtComponent::HandleEvent(msg, synthetic);
}
MsgRouting AwtCheckbox::HandleEvent(MSG *msg, BOOL synthetic)
{
if (IsFocusingMouseMessage(msg)) {
SendMessage(BM_SETSTATE, (WPARAM)(msg->message == WM_LBUTTONDOWN ? TRUE : FALSE));
delete msg;
return mrConsume;
}
if (IsFocusingKeyMessage(msg)) {
SendMessage(BM_SETSTATE, (WPARAM)(msg->message == WM_KEYDOWN ? TRUE : FALSE));
if (msg->message == WM_KEYDOWN) {
m_fLButtonDowned = TRUE;
} else if (m_fLButtonDowned == TRUE) {
WmNotify(BN_CLICKED);
m_fLButtonDowned = TRUE;
}
delete msg;
return mrConsume;
}
return AwtComponent::HandleEvent(msg, synthetic);
}
MsgRouting AwtList::HandleEvent(MSG *msg, BOOL synthetic)
{
if (IsFocusingMouseMessage(msg)) {
LONG item = static_cast<LONG>(SendListMessage(LB_ITEMFROMPOINT, 0, msg->lParam));
if (item != LB_ERR) {
if (isMultiSelect) {
if (IsItemSelected(item)) {
Deselect(item);
} else {
Select(item);
}
} else {
Select(item);
}
}
delete msg;
return mrConsume;
}
if (msg->message == WM_KEYDOWN && msg->wParam == VK_RETURN) {
WmNotify(LBN_DBLCLK);
}
return AwtComponent::HandleEvent(msg, synthetic);
}
MsgRouting
AwtTextField::HandleEvent(MSG *msg, BOOL synthetic)
{
MsgRouting returnVal;
/*
* RichEdit 1.0 control starts internal message loop if the
* left mouse button is pressed while the cursor is not over
* the current selection or the current selection is empty.
* Because of this we don't receive WM_MOUSEMOVE messages
* while the left mouse button is pressed. To work around
* this behavior we process the relevant mouse messages
* by ourselves.
* By consuming WM_MOUSEMOVE messages we also don't give
* the RichEdit control a chance to recognize a drag gesture
* and initiate its own drag-n-drop operation.
*
* The workaround also allows us to implement synthetic focus mechanism.
*/
if (IsFocusingMouseMessage(msg)) {
LONG lCurPos = EditGetCharFromPos(msg->pt);
/*
* NOTE: Plain EDIT control always clears selection on mouse
* button press. We are clearing the current selection only if
* the mouse pointer is not over the selected region.
* In this case we sacrifice backward compatibility
* to allow dnd of the current selection.
*/
if (msg->message == WM_LBUTTONDBLCLK) {
jchar echo = SendMessage(EM_GETPASSWORDCHAR);
if(echo == 0){
SetStartSelectionPos(static_cast<LONG>(SendMessage(
EM_FINDWORDBREAK, WB_MOVEWORDLEFT, lCurPos)));
SetEndSelectionPos(static_cast<LONG>(SendMessage(
EM_FINDWORDBREAK, WB_MOVEWORDRIGHT, lCurPos)));
}else{
SetStartSelectionPos(0);
SetEndSelectionPos(GetTextLength());
}
} else {
SetStartSelectionPos(lCurPos);
SetEndSelectionPos(lCurPos);
}
CHARRANGE cr;
cr.cpMin = GetStartSelectionPos();
cr.cpMax = GetEndSelectionPos();
EditSetSel(cr);
delete msg;
return mrConsume;
} else if (msg->message == WM_LBUTTONUP) {
/*
* If the left mouse button is pressed on the selected region
* we don't clear the current selection. We clear it on button
* release instead. This is to allow dnd of the current selection.
*/
if (GetStartSelectionPos() == -1 && GetEndSelectionPos() == -1) {
CHARRANGE cr;
LONG lCurPos = EditGetCharFromPos(msg->pt);
cr.cpMin = lCurPos;
cr.cpMax = lCurPos;
EditSetSel(cr);
}
/*
* Cleanup the state variables when left mouse button is released.
* These state variables are designed to reflect the selection state
* while the left mouse button is pressed and be set to -1 otherwise.
*/
SetStartSelectionPos(-1);
SetEndSelectionPos(-1);
SetLastSelectionPos(-1);
delete msg;
return mrConsume;
} else if (msg->message == WM_MOUSEMOVE && (msg->wParam & MK_LBUTTON)) {
/*
* We consume WM_MOUSEMOVE while the left mouse button is pressed,
* so we have to simulate autoscrolling when mouse is moved outside
* of the client area.
*/
POINT p;
RECT r;
BOOL bScrollLeft = FALSE;
BOOL bScrollRight = FALSE;
BOOL bScrollUp = FALSE;
BOOL bScrollDown = FALSE;
p.x = msg->pt.x;
p.y = msg->pt.y;
VERIFY(::GetClientRect(GetHWnd(), &r));
if (p.x < 0) {
bScrollLeft = TRUE;
p.x = 0;
} else if (p.x > r.right) {
bScrollRight = TRUE;
p.x = r.right - 1;
}
LONG lCurPos = EditGetCharFromPos(p);
if (GetStartSelectionPos() != -1 &&
GetEndSelectionPos() != -1 &&
lCurPos != GetLastSelectionPos()) {
CHARRANGE cr;
SetLastSelectionPos(lCurPos);
cr.cpMin = GetStartSelectionPos();
cr.cpMax = GetLastSelectionPos();
EditSetSel(cr);
}
if (bScrollLeft == TRUE || bScrollRight == TRUE) {
SCROLLINFO si;
memset(&si, 0, sizeof(si));
si.cbSize = sizeof(si);
si.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
VERIFY(::GetScrollInfo(GetHWnd(), SB_HORZ, &si));
if (bScrollLeft == TRUE) {
si.nPos = si.nPos - si.nPage / 2;
si.nPos = max(si.nMin, si.nPos);
} else if (bScrollRight == TRUE) {
si.nPos = si.nPos + si.nPage / 2;
si.nPos = min(si.nPos, si.nMax);
}
/*
* Okay to use 16-bit position since RichEdit control adjusts
* its scrollbars so that their range is always 16-bit.
*/
DASSERT(abs(si.nPos) < 0x8000);
SendMessage(WM_HSCROLL,
MAKEWPARAM(SB_THUMBPOSITION, LOWORD(si.nPos)));
}
delete msg;
return mrConsume;
}
/*
* Store the 'synthetic' parameter so that the WM_PASTE security check
* happens only for synthetic events.
*/
m_synthetic = synthetic;
returnVal = AwtComponent::HandleEvent(msg, synthetic);
m_synthetic = FALSE;
return returnVal;
}
