128 lines
6.2 KiB
C++
128 lines
6.2 KiB
C++
#pragma once
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#include "global.h"
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// https://blog.csdn.net/MrHHHHHH/article/details/134182253
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class Input : public QLineEdit {
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public:
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explicit Input(QWidget* parent = nullptr) : QLineEdit(parent) {
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setStyle(new Style());
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setFrame(true);
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// 当光标的位置在文本编辑器中改变时，这个信号会被触发。old和new参数分别表示光标改变前后的位置。
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connect(this, &QLineEdit::cursorPositionChanged, this, [=](int n_old, int n_new) {
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// qDebug().noquote() << "[" << __FILE__ << __LINE__ << "]" << "n_old :" << n_old << "n_new :" << n_new;
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});
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// 当用户完成文本编辑（例如按下Enter键或点击其他区域使编辑结束）时，这个信号会被触发。
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connect(this, &QLineEdit::editingFinished, this, [=]() {
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// qDebug().noquote() << "[" << __FILE__ << __LINE__ << "]" << "text :" << this->text();
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});
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// 当用户在文本编辑器中按下Enter键时，这个信号会被触发。
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connect(this, &QLineEdit::returnPressed, this, [=]() {
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// qDebug().noquote() << "[" << __FILE__ << __LINE__ << "]" << "text :" << this->text();
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});
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// 当文本编辑器中的选区发生变化时，这个信号会被触发。例如，当用户选择或取消选择文本时。
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connect(this, &QLineEdit::selectionChanged, this, [=]() {
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// qDebug().noquote() << "[" << __FILE__ << __LINE__ << "]" << "text :" << this->text();
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});
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// 当文本编辑器中的文本发生更改时，这个信号会被触发。参数text是改变后的文本内容。
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connect(this, &QLineEdit::textChanged, this, [=](const QString& text) {
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// qDebug().noquote() << "[" << __FILE__ << __LINE__ << "]" << "text :" << text;
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});
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// 当文本编辑器开始编辑新的文本时，这个信号会被触发。参数text是当前编辑的文本内容。
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connect(this, &QLineEdit::textEdited, this, [=](const QString& text) {
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// qDebug().noquote() << "[" << __FILE__ << __LINE__ << "]" << "text :" << text;
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});
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// update();
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}
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QString unit = "MHZ";
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QFont font;
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QPen pen;
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QColor focus_color = Qt::red;
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QColor default_color = Qt::black;
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protected:
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void paintEvent(QPaintEvent* event) override {
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QLineEdit::paintEvent(event); // 调用原始绘制
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auto fm = QFontMetrics(font);
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing, true);
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int w = width();
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int h = height();
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int pen_w = 1;
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if (QApplication::focusWidget() == this) {
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painter.setPen(QPen(focus_color, pen_w));
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}
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else {
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painter.setPen(QPen(default_color, pen_w));
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}
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painter.drawRoundedRect(rect(), h / 4, h / 4);
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painter.setPen(pen);
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painter.setFont(font);
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int unit_width = fm.horizontalAdvance(unit);
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int th = fm.height();
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int x = rect().right() - unit_width - 5; // 计算单位的绘制位置
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painter.drawText(x, height() / 2 + th / 2, unit);
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setTextMargins(0, 0, unit_width + 4, 0); // 右边留出单位的空间
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}
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class Style : public QProxyStyle {
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public:
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void drawPrimitive(QStyle::PrimitiveElement element, const QStyleOption* option, QPainter* painter,
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const QWidget* widget) const override {
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// 先调用默认的绘制
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auto t = qobject_cast<const QLineEdit*>(widget);
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if (!t)
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return;
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static bool it = true;
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// QProxyStyle::drawPrimitive(element, option, painter, widget);
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// qDebug() << "t->hasFrame() == " << t->hasFrame();
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if (it) {
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// QProxyStyle::drawPrimitive(element, option, painter, widget);
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it = false;
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}
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// 行编辑器边框
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if (element == PE_PanelLineEdit) {
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//
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}
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// 行编辑器边框
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if (element == PE_FrameLineEdit) {
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// qDebug() << "line_edit drawPrimitive " << element;
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// qDebug() << "width " << option->rect.width();
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}
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}
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void drawComplexControl(ComplexControl control, const QStyleOptionComplex* option, QPainter* painter,
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const QWidget* widget) const override {
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// auto t = qobject_cast<const QLineEdit*>(widget);
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// if (!t) return;
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// qDebug() << "line_edit drawComplexControl " << control;
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// QProxyStyle::drawComplexControl(control, option, painter, widget);
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}
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void drawControl(ControlElement element, const QStyleOption* option, QPainter* painter,
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const QWidget* widget) const override {
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// auto t = qobject_cast<const QLineEdit*>(widget);
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// qDebug() << "line_edit drawControl " << element;
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// QProxyStyle::drawControl(element, option, painter, widget);
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// if (!t) return;
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}
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// void drawItemText(QPainter* painter, const QRect& rect, int flags, const QPalette& pal, bool enabled,
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// const QString& text, QPalette::ColorRole text_role) const override {
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//
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//
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// }
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// void drawItemPixmap(QPainter* painter, const QRect& rect, int alignment, const QPixmap& pixmap) const
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// override {
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//
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// }
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QRect subElementRect(SubElement element, const QStyleOption* option, const QWidget* widget) const override {
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auto t = qobject_cast<const QLineEdit*>(widget);
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if (!t) {
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return QProxyStyle::subElementRect(element, option, widget);
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}
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// qDebug() << "line_edit subElementRect " << element;
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// 这里可以自定义返回不同的 QRect 以控制子元素的大小或位置
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if (element == SE_LineEditContents) {
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QRect rect = QProxyStyle::subElementRect(element, option, widget);
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// rect.adjust(5, 5, -5, -5); // 例如，让文本内容区域缩小一点
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return rect;
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}
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return QProxyStyle::subElementRect(element, option, widget);
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}
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};
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};
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