85 lines
2.5 KiB
C++
85 lines
2.5 KiB
C++
#include "Text_Shower.h"
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#include <QFontMetrics>
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#include <QPainter>
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#include <algorithm>
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namespace Flex_Qt {
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Text_Shower::Text_Shower(QWidget* parent) : QWidget(parent) {
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setAttribute(Qt::WA_TranslucentBackground);
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// 宽度交给布局，高度最小
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setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
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}
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void Text_Shower::set_text(const QString& text) {
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m_text = text;
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updateGeometry(); // 通知布局重新计算
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update();
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}
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void Text_Shower::set_title(const QString& title) {
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m_title = title;
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updateGeometry();
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update();
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}
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void Text_Shower::set_max_width(int w) {
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m_max_width = w;
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updateGeometry();
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}
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bool Text_Shower::hasHeightForWidth() const {
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return true;
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}
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int Text_Shower::heightForWidth(int width) const {
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width = std::min(width, m_max_width);
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return calculate_height(width);
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}
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QSize Text_Shower::sizeHint() const {
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int w = std::min(400, m_max_width);
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return QSize(w, calculate_height(w));
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}
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QSize Text_Shower::minimumSizeHint() const {
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return QSize(120, 40);
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}
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int Text_Shower::calculate_height(int width) const {
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QFontMetrics fm(font());
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int content_width = width - m_padding * 2;
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if (content_width <= 0)
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return 40;
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QRect text_rect = fm.boundingRect(
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QRect(0, 0, content_width, 10000),
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Qt::TextWordWrap,
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m_text);
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int height = text_rect.height();
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if (!m_title.isEmpty()) {
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QFont title_font = font();
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title_font.setBold(true);
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QFontMetrics title_fm(title_font);
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height += title_fm.height() + 6;
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}
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height += m_padding * 2;
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return height;
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}
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void Text_Shower::paintEvent(QPaintEvent*) {
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing);
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QRect r = rect();
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painter.setBrush(QColor(255, 255, 255));
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painter.setPen(QPen(QColor(0, 0, 0), 1));
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painter.drawRoundedRect(r.adjusted(0, 0, -1, -1), m_radius, m_radius);
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int y = m_padding;
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if (!m_title.isEmpty()) {
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QFont title_font = font();
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title_font.setBold(true);
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painter.setFont(title_font);
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QFontMetrics title_fm(title_font);
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painter.drawText(m_padding,
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y + title_fm.ascent(),
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m_title);
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y += title_fm.height() + 6;
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painter.setFont(font());
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}
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QRect text_rect(m_padding, y,
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width() - m_padding * 2,
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height() - y - m_padding);
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painter.drawText(text_rect,
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Qt::AlignLeft | Qt::TextWordWrap,
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m_text);
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}
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}
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