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January 31, 2020

實戰 ASP.NET C# 移轉到 REACT + DELPHI 03

上回提到Main的作法之後,就要把前端做個完整的Prototype,讓前端歸前端,後端歸後端。完整範例在此:eden-first-todo-list-app全域變數的替代在實作時遇到一些問題點:依登入狀態跳頁,未登入時要跳回首頁承上,【登入成功狀態】要在全體物件都能被看到承上,【取回的使用者資料】要在全體物件都能被看到 要達成上述要件,只要使用全域變數即可達成,在HTML宣告全域變數的JS單元就可以收工。但放在React裡要怎麼實現呢?Hook的useContext可以達成這個目標,它可以讓垂直層的各個元件都能吃到最上層的變數。簡明useContext運作流程:在App(最上層)單元使用【createContext】建立Context物件,此例為【AuthContext】。App內則使用【useState】建立要被控制的變數,此例為【authState】。App內再使用【AuthContext.Provider】提供authState給底下各層使用,此例為【LoginForm、MainForm】。底下各層物件【LoginForm、MainForm】則使用【useContext】把最上層 ...
 
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January 31, 2020

[발표자료] 20200130 실제 사례로 살펴보는 소프트웨어 현대화 방안

[델파이 25주년 기념 세미나] 실제 사례로 살펴보는 소프트웨어 현대화 방안   ...
 
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January 31, 2020

Les patchs à installer sur la version Rio 10.3.3 de Delphi, C++ Builder et RAD Studio

Sortie en novembre 2019, la version 10.3.3 Rio de Delphi, C++Builder et RAD Studio fait l'objet de plusieurs patchs. Leur installation est recommandée si vous voulez pleinement bén&e (...)
 
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January 31, 2020

Accessing pixels in TBitmap – Part II

Problem: How to access the pixels in a FireMonkey TBitmap Environment– C++Builder 10.3.3 – Windows 10 In this post I’ll show three different ways of changing the pixels of an image stored in a FireMonkey TBitmap. I’ll use the techniques to demonstrate some simple image-processing operations such as adjusting the overall brightness and contrast of anContinue reading "Accessing pixels in TBitmap – Part II"
January 2020
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