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andrewbytecoderandrewbytecoder
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添加图片拖拽的实现
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8 files changed

+98
-47
lines changed

8 files changed

+98
-47
lines changed

‎qt01/qt01.pro.user

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE QtCreatorProject>
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<!-- Written by QtCreator 4.9.1, 2023-09-15T00:27:00. -->
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<qtcreator>
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<data>
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<variable>EnvironmentId</variable>
@@ -65,7 +65,7 @@
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">桌面</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">桌面</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">{9dfbdac3-1b15-41db-bb48-96d8b0d23b9a}</value>
68-
<value type="int" key="ProjectExplorer.Target.ActiveBuildConfiguration">2</value>
68+
<value type="int" key="ProjectExplorer.Target.ActiveBuildConfiguration">0</value>
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<value type="int" key="ProjectExplorer.Target.ActiveDeployConfiguration">0</value>
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<value type="int" key="ProjectExplorer.Target.ActiveRunConfiguration">0</value>
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<valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.0">
@@ -315,7 +315,7 @@
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<value type="bool" key="RunConfiguration.UseQmlDebugger">false</value>
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<value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
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<value type="QString" key="RunConfiguration.WorkingDirectory"></value>
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<value type="QString" key="RunConfiguration.WorkingDirectory.default">/work/QT_examples/build-qt01-unknown-Profile</value>
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<value type="QString" key="RunConfiguration.WorkingDirectory.default">/work/QT_examples/build-qt01-unknown-Debug</value>
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</valuemap>
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<value type="int" key="ProjectExplorer.Target.RunConfigurationCount">1</value>
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</valuemap>

‎qt02/qt02.pro.user

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE QtCreatorProject>
3-
<!-- Written by QtCreator 4.9.1, 2023-09-13T00:06:21. -->
3+
<!-- Written by QtCreator 4.9.1, 2023-09-17T21:09:22. -->
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<qtcreator>
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<data>
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<variable>EnvironmentId</variable>

‎qt_clion/CMakeLists.txt

Lines changed: 8 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
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cmake_minimum_required(VERSION 3.19)
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project(test)
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cmake_minimum_required(VERSION 3.12)
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project(qt_clion)
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set(CMAKE_CXX_STANDARD 11)
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set(CMAKE_AUTOMOC ON)
@@ -10,10 +10,14 @@ set(QT_VERSION 5)
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set(REQUIRED_LIBS Core Gui Widgets)
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set(REQUIRED_LIBS_QUALIFIED Qt5::Core Qt5::Gui Qt5::Widgets)
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add_executable(${PROJECT_NAME} main.cpp)
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add_executable(${PROJECT_NAME}
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main.cpp
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mainwindow.cpp)
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target_include_directories(${PROJECT_NAME}
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PUBLIC ./)
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set(CMAKE_PREFIX_PATH "D:/software/Qt5.13.0/mingw73_64/lib/cmake/Qt5")
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#set(CMAKE_PREFIX_PATH "D:/software/Qt5.13.0/mingw73_64/lib/cmake/Qt5")
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if (NOT CMAKE_PREFIX_PATH)

‎qt_clion/main.cpp

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#include <QApplication>
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#include <QPushButton>
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4+
#include "mainwindow.h"
5+
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int main(int argc, char *argv[]) {
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QApplication a(argc, argv);
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QPushButton button("Hello world!", nullptr);

‎qt_clion/mainwindow.ui

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<?xml version="1.0" encoding="UTF-8"?>
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<ui version="4.0">
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<author/>
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<comment/>
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<exportmacro/>
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<class>MainWindow</class>
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<widget class="QMainWindow" name="MainWindow">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>400</width>
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<height>300</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>MainWindow</string>
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</property>
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</widget>
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<pixmapfunction/>
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<connections/>
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</ui>
3+
<class>MainWindow</class>
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<widget class="QMainWindow" name="MainWindow">
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<property name="geometry">
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<rect>
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<x>0</x>
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<y>0</y>
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<width>373</width>
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<height>314</height>
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</rect>
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</property>
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<property name="windowTitle">
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<string>MainWindow</string>
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</property>
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</widget>
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<resources/>
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<connections/>
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</ui>

‎qt_dragdrop/qt_dragdrop.pro.user

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Original file line numberDiff line numberDiff line change
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE QtCreatorProject>
3-
<!-- Written by QtCreator 4.9.1, 2023-09-16T23:55:39. -->
3+
<!-- Written by QtCreator 4.9.1, 2023-09-17T21:09:22. -->
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<qtcreator>
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<data>
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<variable>EnvironmentId</variable>

‎qt_imagedragdrop/mainwindow.cpp

Lines changed: 55 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -42,6 +42,7 @@ MainWindow::~MainWindow()
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void MainWindow::mousePressEvent(QMouseEvent * event)
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{
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// 首先进行图片的获取
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// 将鼠标指针所在的位置强制转换为QLabel类型
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QLabel *child = static_cast<QLabel*>(childAt(event->pos()));
@@ -63,29 +64,78 @@ void MainWindow::mousePressEvent(QMouseEvent * event)
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// 移动过程中显示图片，若是不进行设置则会显示一个小矩形框
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drag->setPixmap(pixmap);
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// 移动过程中鼠标的位置在图片的位置上保持不变，通过设置鼠标抓手实现鼠标在drag移动过程中相对位置一直不改变
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// 如果不设置，拖动过程鼠标将位于左上角位置
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drag->setHotSpot(event->pos() - child->pos());
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// 给原始图片添加阴影
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QPixmap tempPixmap = pixmap; // 使用原始图片
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QPainter painter; // 创建画板
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painter.begin(&tempPixmap);
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// 给图片蒙上一层透明但是淡淡的黑色效果
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painter.fillRect(pixmap.rect(), QColor(121, 127, 127, 127));
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painter.end();
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child->setPixmap(tempPixmap);// 在移动过程中让图片添加一层黑色的阴影
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// 执行拖拽操作
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// 设置拖拽支持复制和移动操作，默认是复制操作，如果是移动操作，那么在拖拽完成之后关闭原有的标签
79+
// 需要注意的是，drag在点击之后，执行exec会一直卡在这里，直到鼠标松开之后exec会返回一个执行的事件
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// 这里的返回值只受到 dropEvent接口的影响
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if (drag->exec(Qt::CopyAction | Qt::MoveAction, Qt::CopyAction) == Qt::MoveAction) {
82+
qDebug() << "1=========";
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child->close();
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} else {
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qDebug() << "2=========";
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// 如果是复制那么拖拽完成之后显示标签
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child->show();
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// 现实原来的图片而不是阴影
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child->setPixmap(pixmap);
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}
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}
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// window drag event
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void MainWindow::dragEnterEvent(QDragEnterEvent *event)
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{
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// 判断是否是我们自定义的mime类型数据，如果是就进行移动操作
97+
if (event->mimeData()->hasFormat("myimage/png")) {
98+
// 这里设置不设置不影响最终结果，但是会影响点击是鼠标的默认小标签，
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event->setDropAction(Qt::MoveAction);
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event->accept();
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} else {
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event->ignore();
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}
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}
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void MainWindow::dragMoveEvent(QDragMoveEvent *event)
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{
85-
109+
if (event->mimeData()->hasFormat("myimage/png")) {
110+
// 这里设置不设置不影响最终结果，但是会影响点击是鼠标的默认小标签，
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event->setDropAction(Qt::MoveAction);
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event->accept();
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} else {
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event->ignore();
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}
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}
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void MainWindow::dropEvent(QDropEvent *event)
89119
{
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120+
if (event->mimeData()->hasFormat("myimage/png")) {
121+
QByteArray itemData = event->mimeData()->data("myimage/png");
122+
QDataStream dataStream(&itemData, QIODevice::ReadOnly);
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QPixmap pixmap;
124+
QPoint offset;
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// accord the in stream order
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dataStream >> pixmap >> offset;
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// create new label add pixpng
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QLabel *newLabel = new QLabel(this);
129+
newLabel->setPixmap(pixmap);
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newLabel->resize(pixmap.size());
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newLabel->move(event->pos() - offset);
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newLabel->show();
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// win close clear the pixmap
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newLabel->setAttribute(Qt::WA_DeleteOnClose);
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event->setDropAction(Qt::MoveAction);
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// event->setDropAction(Qt::CopyAction);
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event->accept();
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} else {
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event->ignore();
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}
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}

‎qt_imagedragdrop/qt_imagedragdrop.pro.user

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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE QtCreatorProject>
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<!-- Written by QtCreator 4.9.1, 2023-09-17T18:12:44. -->
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<qtcreator>
55
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7-
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7+
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<variable>ProjectExplorer.Project.ActiveTarget</variable>
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<data>
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<variable>ProjectExplorer.Project.PluginSettings</variable>
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<valuemap type="QVariantMap">
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<valuelist type="QVariantList" key="ClangCodeModel.CustomCommandLineKey">
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<value type="QString">-fno-delayed-template-parsing</value>
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<valuelist type="QVariantList" key="ClangCodeModel.CustomCommandLineKey"/>
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<value type="bool" key="ClangCodeModel.UseGlobalConfig">true</value>
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<variable>ProjectExplorer.Project.Target.0</variable>
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<valuemap type="QVariantMap">
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Desktop Qt 5.13.0 MinGW 64-bit</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Desktop Qt 5.13.0 MinGW 64-bit</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">qt.qt5.5130.win64_mingw73_kit</value>
65+
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">桌面</value>
66+
<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">桌面</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">{9dfbdac3-1b15-41db-bb48-96d8b0d23b9a}</value>
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<value type="int" key="ProjectExplorer.Target.ActiveBuildConfiguration">0</value>
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<value type="int" key="ProjectExplorer.Target.ActiveDeployConfiguration">0</value>
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<value type="int" key="ProjectExplorer.Target.ActiveRunConfiguration">0</value>
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<valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.0">
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<value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">F:/work/QT_examples/build-qt_imagedragdrop-Desktop_Qt_5_13_0_MinGW_64_bit-Debug</value>
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<value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">/work/QT_examples/build-qt_imagedragdrop-unknown-Debug</value>
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<valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
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<valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
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<value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
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<value type="bool" key="Qt4ProjectManager.Qt4BuildConfiguration.UseShadowBuild">true</value>
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</valuemap>
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<valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.1">
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<value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">F:/work/QT_examples/build-qt_imagedragdrop-Desktop_Qt_5_13_0_MinGW_64_bit-Release</value>
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<value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">/work/QT_examples/build-qt_imagedragdrop-unknown-Release</value>
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<valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
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<valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
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<value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
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<value type="bool" key="Qt4ProjectManager.Qt4BuildConfiguration.UseShadowBuild">true</value>
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</valuemap>
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<valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.2">
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<value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">F:/work/QT_examples/build-qt_imagedragdrop-Desktop_Qt_5_13_0_MinGW_64_bit-Profile</value>
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<value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">/work/QT_examples/build-qt_imagedragdrop-unknown-Profile</value>
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<valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
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<valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
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<value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
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<valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">qt_imagedragdrop</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName"></value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">Qt4ProjectManager.Qt4RunConfiguration:F:/work/QT_examples/qt_imagedragdrop/qt_imagedragdrop.pro</value>
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<value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">Qt4ProjectManager.Qt4RunConfiguration:/work/QT_examples/qt_imagedragdrop/qt_imagedragdrop.pro</value>
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<value type="QString" key="RunConfiguration.Arguments"></value>
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<value type="uint" key="RunConfiguration.QmlDebugServerPort">3768</value>
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<value type="bool" key="RunConfiguration.UseCppDebugger">false</value>
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<value type="bool" key="RunConfiguration.UseQmlDebugger">false</value>
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<value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
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<value type="QString" key="RunConfiguration.WorkingDirectory"></value>
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<value type="QString" key="RunConfiguration.WorkingDirectory.default">F:/work/QT_examples/build-qt_imagedragdrop-Desktop_Qt_5_13_0_MinGW_64_bit-Debug</value>
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<value type="QString" key="RunConfiguration.WorkingDirectory.default">/work/QT_examples/build-qt_imagedragdrop-unknown-Debug</value>
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<value type="int" key="ProjectExplorer.Target.RunConfigurationCount">1</value>
323321
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