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TextAreaWidget: Add support for 2D cursor

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This commit is contained in:
Lynix
2017-08-06 23:37:35 +02:00
parent 506a963539
commit 5aa2efc737
3 changed files with 95 additions and 41 deletions
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73
SDK/include/NDK/Widgets/TextAreaWidget.inl
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@@ -20,11 +20,16 @@ namespace Ndk
m_multiLineEnabled = enable;
}
inline std::size_t TextAreaWidget::GetCursorPosition() const
inline const Nz::Vector2ui& TextAreaWidget::GetCursorPosition() const
{
return m_cursorPosition;
}
inline std::size_t Ndk::TextAreaWidget::GetGlyphUnderCursor() const
{
return m_cursorGlyph;
}
inline std::size_t TextAreaWidget::GetLineCount() const
{
return m_drawer.GetLineCount();
@@ -53,26 +58,80 @@ namespace Ndk
inline void TextAreaWidget::MoveCursor(int offset)
{
if (offset >= 0)
SetCursorPosition(m_cursorPosition += static_cast<std::size_t>(offset));
SetCursorPosition(m_cursorGlyph + static_cast<std::size_t>(offset));
else
{
std::size_t nOffset = static_cast<std::size_t>(-offset);
if (nOffset >= m_cursorPosition)
if (nOffset >= m_cursorGlyph)
SetCursorPosition(0);
else
SetCursorPosition(m_cursorPosition - nOffset);
SetCursorPosition(m_cursorGlyph - nOffset);
}
}
inline void TextAreaWidget::SetCursorPosition(std::size_t cursorPosition)
inline void TextAreaWidget::MoveCursor(const Nz::Vector2i& offset)
{
OnTextAreaCursorMove(this, &cursorPosition);
auto BoundOffset = [] (unsigned int cursorPosition, int offset) -> unsigned int
{
if (offset >= 0)
return cursorPosition + offset;
else
{
unsigned int nOffset = static_cast<unsigned int>(-offset);
if (nOffset >= cursorPosition)
return 0;
else
return cursorPosition - nOffset;
}
};
m_cursorPosition = std::min(cursorPosition, m_drawer.GetGlyphCount());
Nz::Vector2ui cursorPosition = m_cursorPosition;
cursorPosition.x = BoundOffset(static_cast<unsigned int>(cursorPosition.x), offset.x);
cursorPosition.y = BoundOffset(static_cast<unsigned int>(cursorPosition.y), offset.y);
SetCursorPosition(cursorPosition);
}
inline void TextAreaWidget::SetCursorPosition(std::size_t glyphIndex)
{
OnTextAreaCursorMove(this, &glyphIndex);
m_cursorGlyph = std::min(glyphIndex, m_drawer.GetGlyphCount());
std::size_t lineCount = m_drawer.GetLineCount();
std::size_t line = 0U;
for (std::size_t i = line + 1; i < lineCount; ++i)
{
if (m_drawer.GetLine(i).glyphIndex > m_cursorGlyph)
break;
line = i;
}
const auto& lineInfo = m_drawer.GetLine(line);
m_cursorPosition.y = line;
m_cursorPosition.x = m_cursorGlyph - lineInfo.glyphIndex;
RefreshCursor();
}
inline void TextAreaWidget::SetCursorPosition(Nz::Vector2ui cursorPosition)
{
std::size_t lineCount = m_drawer.GetLineCount();
if (cursorPosition.y >= lineCount)
cursorPosition.y = static_cast<unsigned int>(lineCount - 1);
const auto& lineInfo = m_drawer.GetLine(cursorPosition.y);
if (cursorPosition.y + 1 < lineCount)
{
const auto& nextLineInfo = m_drawer.GetLine(cursorPosition.y + 1);
cursorPosition.x = std::min(cursorPosition.x, static_cast<unsigned int>(nextLineInfo.glyphIndex - lineInfo.glyphIndex - 1));
}
SetCursorPosition(lineInfo.glyphIndex + cursorPosition.x); //<TODO: Optimize to prevent recalculation of line
}
inline void TextAreaWidget::SetReadOnly(bool readOnly)
{
m_readOnly = readOnly;