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avoid overlapping tick labels

This commit is contained in:
Uwe Rathmann 2021-04-19 09:28:19 +02:00
parent 228e94dcce
commit a73df141c6
1 changed files with 30 additions and 6 deletions
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36
src/nodes/QskScaleRenderer.cpp
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@ -168,6 +168,8 @@ QSGNode* QskScaleRenderer::updateLabelsNode(
auto nextNode = node->firstChild();
QRectF labelRect;
for ( auto tick : ticks )
{
enum LabelNodeRole
@ -184,7 +186,7 @@ QSGNode* QskScaleRenderer::updateLabelsNode(
if ( label.canConvert< QString >() )
{
const auto text = label.toString();
auto text = label.toString();
if ( text.isEmpty() )
continue;
@ -227,6 +229,30 @@ QSGNode* QskScaleRenderer::updateLabelsNode(
nextNode = qskRemoveTraillingNodes( node, nextNode );
}
if ( !labelRect.isEmpty() && labelRect.intersects( r ) )
{
if ( tick != ticks.last() )
{
text = QString();
}
else
{
if ( auto obsoleteNode = nextNode
? nextNode->previousSibling() : node->lastChild() )
{
node->removeChildNode( obsoleteNode );
if ( obsoleteNode->flags() & QSGNode::OwnedByParent )
delete obsoleteNode;
}
labelRect = r;
}
}
else
{
labelRect = r;
}
if ( nextNode == nullptr )
{
nextNode = new QskTextNode;
@ -246,8 +272,6 @@ QSGNode* QskScaleRenderer::updateLabelsNode(
if ( graphic.isNull() )
continue;
QRectF r;
const auto h = fm.height();
const auto w = graphic.widthForHeight( h );
@ -258,7 +282,7 @@ QSGNode* QskScaleRenderer::updateLabelsNode(
auto pos = tickmarksRect.x() + tickPos - 0.5 * w;
pos = qBound( labelsRect.left(), pos, labelsRect.right() - w );
r = QRectF( pos, labelsRect.y(), w, h );
labelRect = QRectF( pos, labelsRect.y(), w, h );
alignment = Qt::AlignHCenter | Qt::AlignBottom;
}
else
@ -266,7 +290,7 @@ QSGNode* QskScaleRenderer::updateLabelsNode(
auto pos = tickmarksRect.bottom() - ( tickPos + 0.5 * h );
pos = qBound( labelsRect.top(), pos, labelsRect.bottom() - h );
r = QRectF( labelsRect.right() - w, pos, w, h );
labelRect = QRectF( labelsRect.right() - w, pos, w, h );
alignment = Qt::AlignRight | Qt::AlignVCenter;
}
@ -286,7 +310,7 @@ QSGNode* QskScaleRenderer::updateLabelsNode(
QskSkinlet::updateGraphicNode(
skinnable->owningControl(), graphicNode,
graphic, m_colorFilter, r, alignment );
graphic, m_colorFilter, labelRect, alignment );
nextNode = nextNode->nextSibling();
}