void TextBox::OnTextInput(const SDL_TextInputEvent& textEvent)
{
GetWindow()->SetCursorHidden(true);
if (m_position == m_text.size())
m_text.append(textEvent.text);
else
m_text.insert(m_position, textEvent.text);
auto charWidth = GetWindow()->GetFont()->GetTextSize(textEvent.text);
MoveCaret(charWidth);
++m_position;
m_texture = GetWindow()->CreateTextureForText(m_text, GetWindow()->GetFont(), GetForegroundColor(), GetBackgroundColor());
}
int32 SPopup::OnPaint(const FPaintArgs& Args, const FGeometry& AllottedGeometry, const FSlateRect& MyClippingRect, FSlateWindowElementList& OutDrawElements, int32 LayerId, const FWidgetStyle& InWidgetStyle, bool bParentEnabled) const
{
FArrangedChildren ArrangedChildren(EVisibility::Visible);
this->ArrangeChildren(AllottedGeometry, ArrangedChildren);
// There may be zero elements in this array if our child collapsed/hidden
if (ArrangedChildren.Num() > 0)
{
check(ArrangedChildren.Num() == 1);
FArrangedWidget& TheChild = ArrangedChildren[0];
FWidgetStyle CompoundedWidgetStyle = FWidgetStyle(InWidgetStyle)
.BlendColorAndOpacityTint(ColorAndOpacity.Get())
.SetForegroundColor(GetForegroundColor());
// An SPopup just queues up its children to be painted after everything in this window is done painting.
OutDrawElements.QueueDeferredPainting(
FSlateWindowElementList::FDeferredPaint(TheChild.Widget, Args.WithNewParent(this), TheChild.Geometry, MyClippingRect, CompoundedWidgetStyle, ShouldBeEnabled(bParentEnabled))
);
}
return LayerId;
}
void TextBox::KeydownBackspace()
{
if (m_position == 0)
return;
auto charWidth = static_cast<int>(GetWindow()->GetFont()->GetCharSize(m_text[m_position - 1]));
assert(charWidth > 0);
if (m_position == m_text.size())
m_text.pop_back();
else
m_text.erase(m_position - 1, 1);
m_texture = GetWindow()->CreateTextureForText(m_text, GetWindow()->GetFont(), GetForegroundColor(), GetBackgroundColor());
--m_position;
// don't move the caret if the string is bigger than the text box
if (m_texture.GetWidth() < GetLocation().w - (TextOffsetX * 2) + CaretWidth)
{
MoveCaret(-charWidth);
}
else if (m_clipOffset > 0)
{
if (m_clipOffset < charWidth)
{
// if there is a single character being clipped
// move the caret by the number of visible pixels.
MoveCaret(-(charWidth - m_clipOffset));
m_clipOffset = 0;
}
else
{
m_clipOffset -= charWidth;
}
}
}
void TextBox::KeydownDelete()
{
if (m_position < m_text.size())
{
m_text.erase(m_position, 1);
m_texture = GetWindow()->CreateTextureForText(m_text, GetWindow()->GetFont(), GetForegroundColor(), GetBackgroundColor());
}
}
