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| ** Copyright (C) 2017 Klaralvdalens Datakonsult AB (KDAB). |
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| |
| #include "qspritegrid.h" |
| #include "qspritegrid_p.h" |
| |
| #include <Qt3DRender/qabstracttexture.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| using namespace Qt3DCore; |
| |
| namespace Qt3DExtras { |
| |
| QSpriteGridPrivate::QSpriteGridPrivate() |
| : QAbstractSpriteSheetPrivate() |
| , m_numColumns(1) |
| , m_numRows(1) |
| { |
| } |
| |
| int QSpriteGridPrivate::maxIndex() const |
| { |
| return m_numColumns * m_numRows - 1; |
| } |
| |
| void QSpriteGridPrivate::updateSizes() |
| { |
| Q_Q(QSpriteGrid); |
| if (m_texture && m_numColumns && m_numRows) { |
| m_textureSize = QSize(m_texture->width(), m_texture->height()); |
| m_cellSize = QSizeF((float) m_texture->width() / m_numColumns, (float) m_texture->height() / m_numRows); |
| } else { |
| m_textureSize = QSize(); |
| m_cellSize = QSizeF(); |
| } |
| |
| if (m_cellSize.isEmpty() || m_numColumns == 0 || m_numRows == 0) { |
| if (m_currentIndex != -1) { |
| m_currentIndex = -1; |
| emit q->currentIndexChanged(m_currentIndex); |
| } |
| m_textureTransform.setToIdentity(); |
| emit q->textureTransformChanged(m_textureTransform); |
| return; |
| } |
| |
| if (m_currentIndex == -1) { |
| m_currentIndex = 0; |
| emit q->currentIndexChanged(m_currentIndex); |
| } |
| updateTransform(); |
| } |
| |
| void QSpriteGridPrivate::updateTransform() |
| { |
| Q_Q(QSpriteGrid); |
| const float xScale = (float) m_cellSize.width() / (float) m_textureSize.width(); |
| const float yScale = (float) m_cellSize.height() / (float) m_textureSize.height(); |
| |
| const int currentRow = m_currentIndex / m_numColumns; |
| const int currentColumn = m_currentIndex % m_numColumns; |
| const float xTranslate = currentColumn * xScale; |
| const float yTranslate = currentRow * yScale; |
| |
| m_textureTransform.setToIdentity(); |
| m_textureTransform(0, 0) = xScale; |
| m_textureTransform(1, 1) = yScale; |
| m_textureTransform(0, 2) = xTranslate; |
| m_textureTransform(1, 2) = yTranslate; |
| emit q->textureTransformChanged(m_textureTransform); |
| } |
| |
| /*! |
| Constructs a new QSpriteGrid instance with parent object \a parent. |
| */ |
| QSpriteGrid::QSpriteGrid(QNode *parent) |
| : QAbstractSpriteSheet(*new QSpriteGridPrivate, parent) |
| { |
| } |
| |
| QSpriteGrid::~QSpriteGrid() |
| { |
| } |
| |
| int QSpriteGrid::rows() const |
| { |
| Q_D(const QSpriteGrid); |
| return d->m_numRows; |
| } |
| |
| void QSpriteGrid::setRows(int rows) |
| { |
| Q_D(QSpriteGrid); |
| if (d->m_numRows != rows) { |
| d->m_numRows = rows; |
| d->updateSizes(); |
| emit rowsChanged(rows); |
| } |
| } |
| |
| int QSpriteGrid::columns() const |
| { |
| Q_D(const QSpriteGrid); |
| return d->m_numColumns; |
| } |
| |
| void QSpriteGrid::setColumns(int columns) |
| { |
| Q_D(QSpriteGrid); |
| if (d->m_numColumns != columns) { |
| d->m_numColumns = columns; |
| d->updateSizes(); |
| emit columnsChanged(columns); |
| } |
| } |
| |
| } // namespace Qt3DExtras |
| |
| QT_END_NAMESPACE |