bool Dialog::PreprocessMessage(const KeyMessage& message) {
if (message.id == WM_KEYDOWN) {
if ((message.GetVirtualKey() == VK_RETURN) || (message.GetVirtualKey() == VK_ESCAPE)) {
auto focused_control = GetFocusedControl();
if ((focused_control != nullptr) && focused_control->AcceptKeyMessage(message)) {
return false;
}
if (message.GetVirtualKey() == VK_ESCAPE) {
CloseWithResult(DialogResult::Cancel);
return true;
}
//VK_RETURN
if (current_default_button_ != nullptr) {
if (current_default_button_->GetWindow().get() == this) {
current_default_button_->Click();
return true;
}
}
}
}
return __super::PreprocessMessage(message);
}
bool ComboBox::KeyDown(const KeyMessage& message) {
auto key = message.GetVirtualKey();
if ((key == VK_UP) || (key == VK_DOWN)) {
if (SelectNextDropDownListItem(key == VK_UP)) {
return true;
}
}
else if (key == VK_RETURN) {
EnterKeyDown();
return true;
}
else if (key == VK_SPACE) {
//The edit text box processes the space key down event,
//but it still delivers this event to here, then click event
//of clickable control triggered. So omit the event to
//prevent this problem.
if (IsEditable()) {
return true;
}
}
return __super::KeyDown(message);
}
bool ComboBox::EditTextBox::KeyDown(const KeyMessage& message) {
auto key = message.GetVirtualKey();
if (key == VK_UP || key == VK_DOWN || key == VK_RETURN) {
//Call the default handler to derives the event to its parent - combo box.
return Control::KeyDown(message);
}
else {
return __super::KeyDown(message);
}
}