titleblocktemplaterenderer.cpp

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#include "titleblocktemplaterenderer.h"
#include "titleblocktemplate.h"

TitleBlockTemplateRenderer::TitleBlockTemplateRenderer(QObject *parent) :
    QObject(parent),
    m_titleblock_template(nullptr),
    m_use_cache(true),
    m_last_known_titleblock_width(-1)
{
}

TitleBlockTemplateRenderer::~TitleBlockTemplateRenderer() {
}

const TitleBlockTemplate *TitleBlockTemplateRenderer::titleBlockTemplate() const {
    return(m_titleblock_template);
}

void TitleBlockTemplateRenderer::setTitleBlockTemplate(const TitleBlockTemplate *titleblock_template) {
    if (titleblock_template != m_titleblock_template) {
        m_titleblock_template = titleblock_template;
        invalidateRenderedTemplate();
    }
}

void TitleBlockTemplateRenderer::setContext(const DiagramContext &context) {
    m_context = context;
    invalidateRenderedTemplate();
}

DiagramContext TitleBlockTemplateRenderer::context() const {
    return  m_context;
}

int TitleBlockTemplateRenderer::height() const {
    if (!m_titleblock_template) return(-1);
    return(m_titleblock_template -> height());
}

void TitleBlockTemplateRenderer::render(QPainter *provided_painter, int titleblock_width) {
    if (!m_titleblock_template) return;
    
    if (m_use_cache) {
        // Do we really need to calculate all this again?
        if (titleblock_width != m_last_known_titleblock_width || m_rendered_template.isNull()) {
            renderToQPicture(titleblock_width);
        }
        
        provided_painter -> save();
        m_rendered_template.play(provided_painter);
        provided_painter -> restore();
    } else {
        m_titleblock_template -> render(*provided_painter, m_context, titleblock_width);
    }
}


void TitleBlockTemplateRenderer::renderDxf(QRectF &title_block_rect, int titleblock_width, QString &file_path, int color) {
    if (!m_titleblock_template) return;
    m_titleblock_template -> renderDxf(title_block_rect, m_context, titleblock_width, file_path, color);
}

void TitleBlockTemplateRenderer::renderToQPicture(int titleblock_width) {
    if (!m_titleblock_template) return;
    
    // we render the template on our internal QPicture
    QPainter painter(&m_rendered_template);
    
    m_titleblock_template -> render(painter, m_context, titleblock_width);
    
    // memorize the last known width
    m_last_known_titleblock_width = titleblock_width;
}

void TitleBlockTemplateRenderer::invalidateRenderedTemplate() {
    m_rendered_template = QPicture();
}

void TitleBlockTemplateRenderer::setUseCache(bool use_cache) {
    m_use_cache = use_cache;
}

bool TitleBlockTemplateRenderer::useCache() const {
    return(m_use_cache);
}