QML introduction to advanced

This is a Earth salt Of the 178 Original articles

1

Hello everyone , I am earth salt .

Today, we have solved the need to wait for the chip to be taken out after detection before resetting , The corresponding device will pop up the specified dialog box for confirmation and then reset .

Software translation is to use qml Dynamically generate button requirements on the dialog box .

Look at the official qml Dialog example , I feel very big .

pawn .

Use a foreign elder brother's project , Similar to Apple style dialog .

The code was accumulated by me a long time ago , Find this link again , It feels like it took me a lifetime .

https://github.com/anyks/MessageDialogIOSQml

One by one qml Encapsulates the model and delegates , Interface calls are very smooth .

On use , We need to pay attention to , The interface function open The parameter of must have enabled attribute , For example, put button Example .

2

Here, I will push brother Tao qml Application framework , Integrated html journal 、 Dynamic addition and deletion of tables 、 Component associated to designer interface drag and drop call 、opengl Special effects examples, etc .

qml From the beginning to the advanced stage , Thank you, brother Tao .

https://github.com/jaredtao/TaoQuick

Steal two pictures here .

3

Today I watched qt Source code , Search the following class definitions class+ macro + Meaning of class name .

The following resources were found , Feel like doing SDK Or class library development depends on this .

# https://blog.csdn.net/LinearF/article/details/81981031
# https://blog.csdn.net/weixin_39743893/article/details/81225240
#ifdef UILIB_STATIC // If it's static UI library 
#  define DUILIB_API // No need for dynamic links , Defined as an empty string 
#else
#  if defined(UILIB_EXPORTS)// Need to export UI library 
#    if  defined(_MSC_VER)// If it is a Microsoft compiler （ Defines the version number ）
#      define DUILIB_API __declspec(dllexport)// Define as export 
#    else
#      define DUILIB_API // Non Microsoft compilers , Empty string  
#    endif
#  else// No need to export UI library 
#    if defined(_MSC_VER)// If it is a Microsoft compiler （ Defines the version number ）
#      define DUILIB_API __declspec(dllimport)// Defined as import 
#    else
#      define DUILIB_API // Non Microsoft compilers , Empty string 
#    endif
#  endif
#endif

4

Mr. Liu shows the machine vision operation again , The software is too slick .

We will find out whether the identified objects will be detected according to the setting of area size .

Of course, it seems that we can visualize the degree to which the coordinate axis is now offset to the horizontal axis . 

We can do principal component analysis on its area , Then analyze the main directions for visualization .

Western Chongqing image Trainee , official account ： Western Chongqing image Trainee Try to use OpnenCv Write a simple example of measuring the rotation angle ！

The knowledge of internal links is also enlightening .

Today is another bald day , pawn .

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