Universal Mobile Qt to write custom 61-

I. Introduction

Universal Mobile category, the goal is to achieve any controls put in later, supports mouse drag, or drag the parent class in the container, this scenario is very large, such as placing the device on a map, you need to press the user-drag move to the appropriate location specified, and then save the location coordinates to device database, next time you open direct load, extensive use of security in some of the above projects, power projects, environmental monitoring, and sometimes equipment corresponding to a variety of types, done before this movement would be to directly encapsulated in a custom control code corresponding to the device, there is a huge drawback is that if we add a new control, and the need to repeat code to control the job, independent whether this feature, as long as incoming control on the line, of course, you can, for example, I wrote a lot of custom controls, the controls now need to put in a container can freely drag, just a new universal mobile class on the line.
Project Open Source Address: https://gitee.com/feiyangqingyun/QWidgetDemo

Second, the realization of functions

• 1: You can specify the need to move the widget
• 2: you can set whether to define a left mouse button drag
• 3: Support any widget controls

Third, renderings

Fourth, the header file code

#ifndef MOVEWIDGET_H
#define MOVEWIDGET_H

/**
 * 通用控件移动类 作者:feiyangqingyun(QQ:517216493) 2019-9-28
 * 1:可以指定需要移动的widget
 * 2:可设置是否限定鼠标左键拖动
 * 3:支持任意widget控件
 */

#include <QWidget>

#ifdef quc
#if (QT_VERSION < QT_VERSION_CHECK(5,7,0))
#include <QtDesigner/QDesignerExportWidget>
#else
#include <QtUiPlugin/QDesignerExportWidget>
#endif

class QDESIGNER_WIDGET_EXPORT MoveWidget : public QObject
#else
class MoveWidget : public QObject
#endif

{
    Q_OBJECT
public:
    explicit MoveWidget(QObject *parent = 0);

protected:
    bool eventFilter(QObject *watched, QEvent *event);

private:
    QPoint lastPoint;   //最后按下的坐标
    bool pressed;       //鼠标是否按下
    bool leftButton;    //限定鼠标左键
    QWidget *widget;    //移动的控件

public Q_SLOTS:
    //设置是否限定鼠标左键
    void setLeftButton(bool leftButton);
    //设置要移动的控件
    void setWidget(QWidget *widget);
};

#endif // MOVEWIDGET_H

Fifth, the core code

#include "movewidget.h"
#include "qevent.h"
#include "qdebug.h"

MoveWidget::MoveWidget(QObject *parent) : QObject(parent)
{
    lastPoint = QPoint(0, 0);
    pressed = false;
    leftButton = true;
    widget = 0;
}

bool MoveWidget::eventFilter(QObject *watched, QEvent *event)
{
    if (widget != 0 && watched == widget) {
        QMouseEvent *mouseEvent = (QMouseEvent *)event;
        if (mouseEvent->type() == QEvent::MouseButtonPress) {
            //如果限定了只能鼠标左键拖动则判断当前是否是鼠标左键
            if (leftButton && mouseEvent->button() != Qt::LeftButton) {
                return false;
            }

            //判断控件的区域是否包含了当前鼠标的坐标
            if (widget->rect().contains(mouseEvent->pos())) {
                lastPoint = mouseEvent->pos();
                pressed = true;
            }
        } else if (mouseEvent->type() == QEvent::MouseMove && pressed) {
            //计算坐标偏移值,调用move函数移动过去
            int offsetX = mouseEvent->pos().x() - lastPoint.x();
            int offsetY = mouseEvent->pos().y() - lastPoint.y();
            widget->move(widget->x() + offsetX, widget->y() + offsetY);
        } else if (mouseEvent->type() == QEvent::MouseButtonRelease && pressed) {
            pressed = false;
        }
    }

    return QObject::eventFilter(watched, event);
}

void MoveWidget::setWidget(QWidget *widget)
{
    if (this->widget == 0) {
        this->widget = widget;
        this->widget->installEventFilter(this);
    }
}

void MoveWidget::setLeftButton(bool leftButton)
{
    this->leftButton = leftButton;
}

Sixth, the controls described

1. More than 150 exquisite control, covers a variety of dashboards, progress bar, the progress of the ball, compass, graphs, scales, thermometers, navigation bar, navigation bar, flatui, highlight the button, slide the selector, the lunar calendar and so on. Qwt far more than the number of controls integration.
2. Each class can be independently as a separate control, zero coupling each control file and a header file to achieve a code amount, independent of other files to facilitate individual control integrated into the project source code form, less. qwt interlocking control class, highly coupled, want to use one of the controls, must contain all the code.
3. Write all pure Qt, QWidget + QPainter to draw, to support any Qt version Qt4.6 Qt5.13, support for mingw, msvc, gcc compiler, etc., support any operating system such as windows + linux + mac + embedded linux, which does not garbled can be directly integrated into Qt Creator, a built-in controls and use the same, most of the effects can be as long as several properties are set, very convenient.
4. DEMO separate source containing the control corresponding to each control has a convenient reference. It also provides integrated use of all controls a DEMO.
5. Source code for each control has detailed Chinese annotation, are prepared in accordance with unified design specifications, easy to learn to write custom controls.
6. Each control default color and demo corresponding color is very beautiful.
7. More than 130 visible control, six invisible control.
8. Portion control provides a variety of styles style selection, multiple choice style indicator.
9. All controls changes adaptive stretched form.
10. Integrated design custom attribute that supports drag design, WYSIWYG support the import and export in xml format.
11. Activex control that comes with demo, all controls can be run directly in the browser ie.
12. Fontawesome integrated graphics font + Alibaba iconfont collection of hundreds of graphic fonts, font fun graphic brings.
13. All controls and finally generate a dynamic library files (dll or so, etc.) can be integrated directly into qtcreator designed for use in drag.
14. Already qml version, the latter will consider a pyqt version, if the user is in great demand then.
15. Custom plug-in open dynamic library (permanent free), and the back door without any restrictions, ease of use.
16. 26 now available version dll, which includes qt5.12.3 msvc2017 32 + 64 mingw 32 + 64 in.
17. From time to time to increase control and improve controls, regularly updated SDK, to welcome all suggestions, thank you!
18. Qt introductory books recommended Huo Yafei of "Qt Creator Quick Start" "Qt5 programming entry", Qt official Advanced book recommendations "C ++ GUI Qt4 programming."
19. Highly recommended programmer self-discipline and planning book series "lying programmer" "Programmer's growth course", "grief programmer", benefited from a lifetime!
20. SDK Address: https://gitee.com/feiyangqingyun/QUCSDK