在QGraphicsTextitem中增加选择轮廓宽度

Question

我有一个带文本交互的QGraphicsTextitem，用户可以编辑当前文本并添加新文本。但我的新要求是增加选择轮廓宽度，并可由QSlider控制。是否可以增加QGraphicsTextItem的点选择宽度。 我想增加文本周围选择框的笔厚度或大小..

在图像中用虚线绑定文本。是否可以增加虚线笔的尺寸或厚度。

Answer 1

这个问题很古老，但我会履行我的公民义务来尝试答案：

你必须做一些事情。

1. 对您的paint

进行细分

2. 覆盖void TextItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget) { QStyleOptionGraphicsItem opt(*option); // Remove the selection style state, to prevent the dotted line from being drawn. opt.state = QStyle::State_None; // Draw your fill on the item rectangle (or as big as you require) before drawing the text // This is where you can use your calculated values (as member variables) from what you did with the slider painter->setPen(Qt::NoPen); painter->setBrush(Qt::green); painter->drawRect(whateverRectangle()); // Call the parent to do the actual text drawing QGraphicsTextItem::paint(painter, &opt, widget); // You can use these to decide when you draw bool textEditingMode = (textInteractionFlags() & Qt::TextEditorInteraction); bool isSelected = (option->state & QStyle::State_Selected); // Draw your rectangle - can be different in selected mode or editing mode if you wish if (option->state & (QStyle::State_Selected)) { // You can change pen thickness for the selection outline if you like painter->setPen(QPen(option->palette.windowText(), 0, Qt::DotLine)); painter->setBrush(Qt::magenta); painter->drawRect(whateverRectangle()); } } 方法，在其中删除默认选择样式，并绘制自己的

boundingRect

1. 您可能需要覆盖opaqueArea，shape和allprojects { repositories { //... } subprojects { project.configurations.all { resolutionStrategy.eachDependency { details -> if (details.requested.group == 'com.android.support' && !details.requested.name.contains('multidex') ) { details.useVersion "25.4.0" } } } } } 功能，以说明您的尺寸增加。