提要

自定義的彈出窗口，窗口可以實現按下鼠標拖動，鼠標釋放停止拖動，窗口種含有子控件，下拉列表，在點擊下拉列表時窗口移動。

解決方法

因為點擊下拉列表的時候，觸發了窗口的移動事件，所以添加下拉列表的事件過濾。
下面附上實現代碼：

ui->comboBoxReso->installEventFilter(this);bool ResolutionDialog::eventFilter(QObject *obj, QEvent *event) {if(obj == ui->comboBoxReso){if(event->type() == QEvent::MouseMove){return true;}}return QDialog::eventFilter(obj,event); }

ui文件的結構如下：

在構造函數種安裝控件的事件過濾器。然后重寫過濾事件。
完整的代碼如下：
resolutiondialog.h

#ifndef RESOLUTIONDIALOG_H #define RESOLUTIONDIALOG_H#include <QDialog> #include "datastruct.h"/***********類功能描述：分辨率設置對話框************/ namespace Ui { class ResolutionDialog; }class ResolutionDialog : public QDialog {Q_OBJECTpublic:explicit ResolutionDialog(QWidget *parent = nullptr);~ResolutionDialog();//初始化void initResolutions();//初始化下拉列表的分辨率protected:bool eventFilter(QObject *obj, QEvent *event);//過濾事件,過濾掉下拉列表的點擊事件void mousePressEvent(QMouseEvent *event);//鼠標點擊void mouseMoveEvent(QMouseEvent *event);//鼠標移動事件void mouseReleaseEvent(QMouseEvent *event);//鼠標釋放事件 signals:void sigEveryResolution(stuReso &stuResolution);//發送每塊屏的屏幕分辨率 public slots:void onSetRowColSlot(int row,int col);//設置SpinBox的行列信息 private slots:void on_closeBtn_clicked();//關閉按鈕void on_confirmBtn_clicked();//確定按鈕void on_cancelBtn_clicked();//取消按鈕private:Ui::ResolutionDialog *ui;QPoint m_offPos;//鼠標點擊點與窗口左上角之間的距離 };#endif // RESOLUTIONDIALOG_H

resolutiondialog.cpp

#include "resolutiondialog.h" #include "ui_resolutiondialog.h" #include <QStyledItemDelegate>ResolutionDialog::ResolutionDialog(QWidget *parent) :QDialog(parent),ui(new Ui::ResolutionDialog) {ui->setupUi(this);initResolutions();QStyledItemDelegate *delegate = new QStyledItemDelegate();ui->comboBoxReso->setItemDelegate(delegate);ui->comboBoxReso->installEventFilter(this);setWindowFlag(Qt::FramelessWindowHint);setAttribute(Qt::WA_TranslucentBackground); }ResolutionDialog::~ResolutionDialog() {delete ui; }void ResolutionDialog::initResolutions() {QList<QString> strList;strList.append("3840x2160");strList.append("1920x1080");strList.append("1680x1050");strList.append("1600x900");strList.append("1440x900");strList.append("1366x768");strList.append("1280x1024");QStringList strResoList(strList);ui->comboBoxReso->addItems(strResoList); }bool ResolutionDialog::eventFilter(QObject *obj, QEvent *event) {if(obj == ui->comboBoxReso){if(event->type() == QEvent::MouseMove){return true;}}return QDialog::eventFilter(obj,event); }void ResolutionDialog::mousePressEvent(QMouseEvent *event) {if (event->button() == Qt::LeftButton) {QPoint startPos = event->globalPos();m_offPos = startPos - geometry().topLeft();}QDialog::mousePressEvent(event); }void ResolutionDialog::mouseMoveEvent(QMouseEvent *event) {if (event->buttons() == Qt::LeftButton) {QPoint endPos = event->globalPos();move(endPos - m_offPos);}QDialog::mouseMoveEvent(event); }void ResolutionDialog::mouseReleaseEvent(QMouseEvent *event) {QDialog::mouseReleaseEvent(event); }void ResolutionDialog::onSetRowColSlot(int row, int col) {ui->spinBoxRow->setRange(0,row-1);ui->spinBoxCol->setRange(0,col-1); }void ResolutionDialog::on_closeBtn_clicked() {close(); }void ResolutionDialog::on_confirmBtn_clicked() {stuReso tempReso;tempReso.row = ui->spinBoxRow->value();tempReso.col = ui->spinBoxCol->value();QString strTemp = ui->comboBoxReso->currentText();QStringList strList = strTemp.split('x');QString strW = strList.first();QString strH = strList.last();tempReso.width = strW.toInt();tempReso.height = strH.toInt();emit sigEveryResolution(tempReso);accept(); }void ResolutionDialog::on_cancelBtn_clicked() {reject(); }

上面只將這個出現上述問題的類的代碼附上。因為其中涉及到項目中的一些需求實現，讀者可以選擇性讀取，理解我說明的問題解決思路便好，代碼可以參考。由于涉及到qss文件設置樣式，那部分沒有貼出來，讀者可以注釋掉背景透明和無邊框的設置。

總結

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