72 lines
2.0 KiB
C++
72 lines
2.0 KiB
C++
#ifndef SPINBOX_PASTE_HELPER_H
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#define SPINBOX_PASTE_HELPER_H
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#include <QObject>
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#include <QEvent>
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#include <QKeyEvent>
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#include <QApplication>
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#include <QClipboard>
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#include <QSpinBox>
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#include <QDoubleSpinBox>
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#include <QAbstractSpinBox>
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/**
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* @brief SpinBox 粘贴事件过滤器
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* QSpinBox/QDoubleSpinBox 带 prefix 时粘贴会被验证器拒绝，
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* 这里拦截 Ctrl+V，解析剪贴板数值后直接 setValue。
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*
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* 用法：在 setupUI() 之后调用 SpinBoxPasteHelper::install(this);
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*/
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class SpinBoxPasteFilter : public QObject
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{
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public:
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explicit SpinBoxPasteFilter(QObject* parent = nullptr) : QObject(parent) {}
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bool eventFilter(QObject* obj, QEvent* event) override
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{
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if (event->type() != QEvent::KeyPress) {
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return QObject::eventFilter(obj, event);
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}
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QKeyEvent* keyEvent = static_cast<QKeyEvent*>(event);
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if (!keyEvent->matches(QKeySequence::Paste)) {
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return QObject::eventFilter(obj, event);
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}
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QString clipText = QApplication::clipboard()->text().trimmed();
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bool ok = false;
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if (QDoubleSpinBox* dsb = qobject_cast<QDoubleSpinBox*>(obj)) {
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double val = clipText.toDouble(&ok);
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if (ok) {
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dsb->setValue(val);
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return true;
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}
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} else if (QSpinBox* sb = qobject_cast<QSpinBox*>(obj)) {
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int val = clipText.toInt(&ok);
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if (ok) {
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sb->setValue(val);
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return true;
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}
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}
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return QObject::eventFilter(obj, event);
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}
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};
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namespace SpinBoxPasteHelper
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{
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/**
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* @brief 为 parent 下所有 QSpinBox/QDoubleSpinBox 安装粘贴过滤器
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*/
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inline void install(QWidget* parent)
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{
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SpinBoxPasteFilter* filter = new SpinBoxPasteFilter(parent);
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for (QAbstractSpinBox* sb : parent->findChildren<QAbstractSpinBox*>()) {
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sb->installEventFilter(filter);
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}
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}
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}
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#endif // SPINBOX_PASTE_HELPER_H
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