Chapter 16 Operation Interface and Operation Logic
We have discussed in the eighth chapter in the first chapter, and the user interface is the benefit of the business logic. Such separation can be
The software architecture is more reasonable, and the structure is easy to understand, thereby enhancing the flexibility and maintainability of the software.
As I mentioned, the purpose we discussed is to find a practical method from chaos from chaos, this
Is one of the main purposes of this book. Ordered things are easy to understand, easy to understand, you can master it, master after you
It will find that the philosophy behind it is simple, thus sublimation to a higher level to feel good software structure.
Mercure.
The topic of this chapter will focus on how to discuss the client's procedures, I hope that our discussion is pendant with all software.
Help with friends.
First section separation operation interface and operation logic
How to design a friendly software operation interface is an important topic of human-computer engineering research. Easy software has a clear
The show, not only the layout is well known, but the operation intention is also a good understanding, and dealing with generous
Even the answer to you is also attached to the micro. If you write the software like this to tell you the keyword repeating error
User: "Dear, you have previously entered the number of outbound orders numbered 991028, you can't turn it again. Do you want
Check out the previous outline? ", Your software will be greatly increased. Maybe IBM OS2 is because of saying
Many users don't understand nonsense, they are abandoned by users, losing the people, and be bound by Bill Gates.
We don't intend to discuss how to dress up the software, but should talk about the beautiful interface, how should it be better?
The land structure is organized, and the user's operation command is handled.
If you have planned a preliminary mode of operation, use the menu with an icon as a tool for the user's command.
And write the process statement that completes the business processing in the Menuitem's OnClick event. Everything is good, and the business logistics
The series is also processed in the RemoteDataMoudle in the server-side, the classic three-layer architecture. But you
The boss does not like the menu, he has a unique clock on the button, so you need to change the menu to Button, then
Modern code moves to Button's onclick event, or pointing Button's onclick event to its original Menu
The ItemClick event handling process. After the software submits the user trial, the user strongly requires the software to modify the software to Microso.
FT Word 2000 interface, both menus and buttons, but also provide shortcuts for keyboards (because
Their boss is accustomed to the keyboard input method of the old program under DoS. So you have to modify the software
The interface control and adjusts the operation code again so that each command input method can be responded. At last,
After thousands of hard work, you can finalize the modification of the entire software interface.
It can be seen that different people have different hobbies and needs, they each have the habit of operating software. But they make
The same is the same, that is, the specified operation instruction is issued to your software, and the representation of this operation is used.
Software function!
In the needs of all kinds of different users, after the final purpose of all users, we should think about it carefully.
Different users use different means in order to achieve the same purpose. Oh! The original purpose and means are two things,
Only everyone reaches the same purpose in different means.
Therefore, we should separate the operation interface with the operational logic, and should first distinguish the means and purpose, and then will
The purpose is linked. In this way, changes to the operation interface will not affect the operational logic, the means is the means, the purpose is
of. In order to achieve your goal, you can don't ask for means, this is the truth! Said here, maybe someone will say: This truth is understanding. So, if you develop software, more
Using these shallow truths, it is not difficult to design a simple and practical software structure.
What is the benefits of operating interface and operational logic?
1. Easy to understand
When you write a business operation code, you don't care about the interface mode of operation, while in beautifying your software, only
Consider the aesthetics of the interface. The appearance is the appearance, the heart is inner, only you know, the beautiful interface of the appearance is connected
Exquisite to the outstanding operation code, the table is like one. Your friends can appreciate the appearance of beautiful software, and it is easy to read.
Your heart.
2. Easy to maintain
Regardless of the popular interface of the future, it is a new homepage model or Outlook's classic side. You can only repair
Change the part of the interface to meet the requirements. You can also complete your software thoroughly change your face, with a new face
Now. Even the unique skills that can not be passed down from the famous male female in the Sichuan opera. But software is still software,
The inherent functional logic of the software has not changed. However, because of the habit of being happy, chasing fashion fashion
It will make the pocket of the bosses of the software companies more and more drums.
3. Extensible
A new breakthrough in human-computer engineering will provide more command input methods for software users. Today, voice
Identification technology has gradually commercialized. You can already use the voice recognition support module provided by IBM ViaVoice.
Can identify controls for voice commands. Add such controls into your software and operate with your previously written operation logic
Your software is like a long ears, with a aura, you can listen to your story. I also believe that there will always be one day.
Write a control that can read your expression, then the software will be able to touch you according to your emotions.
care. But the soul of the software is still the original operational logic code!
4. Suitable for large-scale software development
Large-scale software development and speaking work cooperation, each other. If you are the boss of a software company, then, in the system
Analytical designers completed software design, you can find a batch of fashion designers to design beautiful sexy boundaries for your software.
Face, please refer to the encoded programmer to write operational logic. And you can easily manage and control the quality of each process,
And the responsibility is clear.
Although the end of the end of the earth has blown, we have to go back to our theme. Separation of operating interfaces and operational logic,
What methods and principles should I follow?
First, you should summarize the functionality of the current module to provide a clear operation command set to the user. Also
It is to say that the design can be provided to the user, which is a list of available commands for the old-fashioned command line program. remember
These commands are set to be the purpose of the user's execution operation.
Then, in each of the commands set according to the command, the operation logic code is planned, and the operation is prepared according to the general principles of the program.
Logic code. For the general principles of writing procedures, please refer to "First Love Delphi" book.
Finally, to remind a little, the operational command is sometimes controlled by the program. Some programmers are in order to achieve
The user is prohibited in a state in a certain state, and the specified operation command is prohibited, try to control the properties of command controls such as menus, buttons.
, Blocking and pressing all controls of all executable commands. However, you want to prohibit commands, not controls!
Below we will discuss the separation operation interface and operational logic, Delphi provides us with a valuable east
West, TAACTIONLIST and TACTION.
Section 2 use TACTIONLIST and TACTION
The meaning of the word "action" is behavior, action or action. TACTION is abstracting the user wants to perform actions or execution of acts, operations or execution of the behavior of the software interface, and TACTIONLIST describes the list of commands. you can
To add a TACTIONLIST component to your Form, Frame or DataModule, double-click this component to be defined
The TACTION objects needed.
Designers and engineers to create Delphi buildings, for most command controls (such as TButton, Tmenuitem, etc.
Wait, designed an action attribute, and often happen to appear in the first item in the Object Inspecter window property page.
On, this can be seen in their hard work. But no matter what, they provide us with a simple way to live
The Action property of the control is associated with the TAction object defined in the TActionList component.
Since the operation logic code written in the Onexecute event of the TACTION object can be automatically associated command control
Call, therefore, replace the type of command control, no modification or adjustment operation logic code. This will use the operating interface.
The surface is separated from the operational logic.
If you want to prohibit users from performing some actions in some states, you can set the enabled properties of the related TACTION objects.
For False, the relevant command control will be freezed, which turns the face, which turns on the grayish face, and
No matter, he is the end of your life.
Thanks again to the master of Delphi, they did everything for us after they were in the station, and they also put their nine yin.
Put in the Source / Vcl / ActNList.Pas unit.
Since there are masters of Jiuyin Zhenjing, we should take cultivation and enhance our internal strength.
First, in the ActNList unit, TACTIONLIST is declared:
TactionList = Class (TCUSTOMACTIONLIST)
Published
Property images;
Property onchange;
Property onexecute;
Property OnUpdate;
END;
TACTIONList only published some properties and events of TCUSTOMActionList. In fact, TACTIONLIST is used
Failed to install TACTION and provide a way to manage TACTION. Detailed usage about TACTIONLIST, we
The discussion will be discussed in the subsequent TactionManager control.
Let's take a look at the discussion of TAAP:
Taction = Class (TCUSTOMACTION)
Published
Property Caption;
Property checked;
Property enabled;
Property helpContext;
Property Hint;
Property ImageIndex;
Property Shortcut;
Property visible;
Property onexecute;
Property OnHint;
Property OnUpdate;
END;
TACTION is inherited from the TCUSTomAction class, as in front, but only some of the characteristics of the parent class. I
I don't want to interpret the original code of TAACTION, I believe that friends who have read "First Love Delphi" can
Enough to interpret these code. I just want to discuss these features published to us, what features can we provide.
Since there are still some characteristics, it is published in the parent class of TAction. It will also talk together in the discussion, but some don't
Important features are no longer nonsense.
CAPTION Attribute: Fill in this property, you can use a short title to explain the meaning of the command operation to the user. This property will automatically update the CAPTION property of the related command control, so the CAPTION property of the button and menu is input.
Category property: The category of the operation command is mainly to facilitate your classification to manage your operation command set. This property
It is published in TcontainedAction in Taction, and then developed in our subsequent TactionManager control
In the item, you will see how this property manages the operation command.
Enabled Property: Control whether the command operation can be executed, which can automatically control whether the associated command control is allowed. block
Command control should start from here.
ImageIndex Properties: Indicates an icon index of an operation command, contacts the images of TACTIONLIST. There is a life of icon
Let the control can enjoy his grace.
Shortcut Properties: Use the shortcuts of the operation command with the keyboard to give the gospel to the people who have a keyboard operation.
Visible Attribute: Control Enabled allows the command control to make gray, control this property allows the command control disappears
Before the households. Note, although the command control disappears, the user can still send an operation command through the shortcut, and enabled
Can really block the command.
Onexecute event: You can write an operation logic code in this event, and when the user triggers the relevant command control,
Start operation logic code for this event.
Other features view Delphi's online help!
Before you first understand TAAActionList and TACTION, we will start practice. The following PrettyPoem program demonstrates
The basic usage of TACTIONLIST and TACTION is very simple. If you don't want to waste time, you can jump directly to the back MU
LTIFACE program to see how to perform the absorbent of Sichuan Opera - change face.
You can find the original code of this program in the CD attached to the book.
File prettypoem.dpr
PROGRAM PRETTYPOEM;
Uses
Forms,
Main in 'main.pas' {fmain};
{$ R * .res}
Begin
Application.INITIALIZE;
Application.createform (TFMain, Fmain);
Application.run;
End.
Document main.pas
Unit main;
Interface
Uses
Windows, Messages, Sysutils, Classes, Graphics, Controls, Forms, Dialogs,
Menus, Actnlist, Comctrls, Toolwin, Stdctrls, Imglist;
Type
Tfmain = Class (TFORM)
Mainmenu: TmainMenu;
ActionList: TAActionList;
ActGucheng: TACTION;
Actximurong: TAACTION;
Actliqingzhao: TACTION;
ACTSUSHI: TACTION;
N1: tMenuitem;
N2: TMENUITEM;
N3: TMENUITEM;
N4: TMENUITEM;
N5: TMENUITEM;
N6: TMENUITEM;
Toolbar1: Ttoolbar;
Toolbutton1: Ttoolbutton;
Toolbutton2: TtoolButton;
Toolbutton3: ttoolbutton;
Toolbutton4: TtoolButton;
Button1: tbutton;
Button2: tbutton;
Button3: tbutton;
Button4: tbutton;
CBDISABLIQINGZHAO: TCHECKBOX; ACTDISABLIQINGZHAO: TACTION
ACTHIDELIQINGZHAO: TACTION;
Cbhideliqingzhao: Tcheckbox;
ImageList: timagelist;
Labpoem: TLABEL;
Labshadow: TLABEL;
Procedure actguchengexecute (sender: TOBJECT);
Procedure actximurongexecute (sender: TOBJECT);
Procedure actdisableliqingzhaoexecute (sender: TOBJECT);
Procedure ACTHIDELIQINGZHAOEXECUTE (Sender: TOBJECT);
Procedure actsushiexecute (sender: TOBJECT);
Procedure Actliqingzhaoexecute (Sender: TOBJECT);
Private
{Private Declarations}
Procedure RecitePoem (Poem: string);
public
{Public declarations}
END;
VAR
Fmain: tfmain;
IMPLEMENTATION
{$ R * .dfm}
Procedure tfmain.recitepoem (poem: string);
Begin
Labpoem.caption: = POEM;
Labshadow.caption: = POEM;
END;
Procedure tfmain.actguchengexecute (sender: TOBJECT);
Begin
RecitePoem ('Night Give me black eyes I use her to find light ");
END;
Procedure tfmain.actximurongexecute (sender: TOBJECT);
Begin
RecitePoem ('Xi water is eager to flow to the sea and the wave is eager to re-return the land');
END;
Procedure tfmain.actsushiexecute (sender: TOBJECT);
Begin
RecitePoem ('people have joys and sorrows with yin and sunny ");
END;
Procedure tfmain.actliqingzhaoexecute (sender: TOBJECT);
Begin
Recitepoem ('sickness is also a ghost ";
END;
Procedure tfmain.actdisableliqingzhaoexecute (sender: TOBJECT);
Begin
Actliqingzhao.Enabled: = not cbdisableliqingzhao.checked;
END;
Procedure tfmain.acthideliqingzhaoexecute (sender: TOBJECT);
Begin
Actliqingzhao.visible: = not cbhideliqingzhao.checked;
END;
End.
Document main.dfm
Object Fmain: Tfmain
LEFT = 192
TOP = 107
Width = 442
HEIGHT = 195
Bordericons = [bisystemmenu, Biminimize]
CAPTION = 'talking about ancient Chinese
Color = CLBTNFACE
Font.charset = GB2312_CHARSET
Font.color = CLWINDOWTEXT
Font.height = -12font.name = 'Song Body'
Font.style = []
Menu = mainmenu
OldcreateOrder = FALSE
Pixelsperinch = 96
TextHeight = 12
Object Labshadow: TLABEL
LEFT = 17
TOP = 41
Width = 380
HEIGHT = 20
CAPTION = 'Ancient and modern poetry names appreciate, please choose your favorite poet. '
Font.charset = GB2312_CHARSET
Font.color = CLBLACK
Font.height = -20
Font.name = 'Lishu'
Font.style = []
ParentFont = FALSE
TRANSPARENT = TRUE
end
Object Labpoem: TLABEL
LEFT = 16
TOP = 40
Width = 380
HEIGHT = 20
CAPTION = 'Ancient and modern poetry names appreciate, please choose your favorite poet. '
Font.charset = GB2312_CHARSET
Font.color = CLBLUE
Font.height = -20
Font.name = 'Lishu'
Font.style = []
ParentFont = FALSE
TRANSPARENT = TRUE
end
Object Toolbar1: Ttoolbar
LEFT = 0
TOP = 0
Width = 434
HEIGHT = 26
AutoSize = True
ButtonWidth = 63
CAPTION = 'Toolbar'
EdgeBorders = [EBTOP, EBBOTTOM]
Flat = true
Images = imagelist
List = TRUE
Showcaptions = true
Taborder = 0
Object Toolbutton1: TtoolButton
LEFT = 0
TOP = 0
Action = actgucheng
end
Object Toolbutton2: Ttoolbutton
LEFT = 63
TOP = 0
Action = actximurong
end
Object Toolbutton3: TtoolButton
LEFT = 126
TOP = 0
Action = ACTSUSHI
end
Object Toolbutton4: TtoolButton
LEFT = 189
TOP = 0
Action = ACTLIQINGZHAO
end
end
Object Button1: TButton
LEFT = 12
TOP = 80
Width = 75
HEIGHT = 25
Action = actgucheng
Taborder = 1
end
Object Button2: TButton
LEFT = 116
TOP = 80
Width = 75
HEIGHT = 25
Action = actximurong
Taborder = 2nd
Object Button3: TButton
LEFT = 12
TOP = 112
Width = 75
HEIGHT = 25
Action = ACTSUSHI
Taborder = 3
end
Object Button4: TButton
LEFT = 116
TOP = 112
Width = 75
HEIGHT = 25
Action = ACTLIQINGZHAO
Taborder = 4
end
Object Cbdisableliqingzhao: Tcheckbox
LEFT = 232
TOP = 116
Width = 81
HEIGHT = 17
Action = actdisableliqingzhao
Taborder = 5
end
Object Cbhideliqingzhao: Tcheckbox
LEFT = 328
TOP = 116
Width = 81
HEIGHT = 17
Action = ACTHIDELIQINGZHAO
Taborder = 6
end
Object Mainmenu: TmainMenu
Images = imagelist
LEFT = 332
TOP = 4
Object N1: TMenuItem
Caption = 'modern feelings'
Object N2: TMenuItem
Action = actgucheng
end
Object N3: TMenuItem
Action = actximurong
end
end
Object N4: TMenuItem
CAPTION = 'Classical style'
Object N5: TMenuItem
Action = ACTSUSHI
end
Object N6: TMenuItem
Action = ACTLIQINGZHAO
end
end
end
Object ActionList: TACTIONLIST: TAACTIONLIST
Images = imagelist
LEFT = 360
TOP = 4
Object actgucheng: TAACTION
Category = 'modern feelings'
CAPTION = 'Gu City'
ImageIndex = 0
Shortcut = 16455
Onexecute = actguchengexecute
end
Object actximurong: TACTION
Category = 'modern feelings'
CAPTION = 'Cham Murong'
ImageIndex = 1
Shortcut = 16472
Onexecute = actximurongexecute
end
Object ACTSUSHI: TAACTION
Category = 'Classical style'
CAPTION = 'Su Shi'
ImageIndex = 2
Shortcut = 16467
Onexecute = ACTSUSHIEXECUTE
end
Object Actliqingzhao: TACTION
Category = 'Classical style'
CAPTION = 'Li Qingzhao'
ImageIndex = 3
Shortcut = 16460
Onexecute = actliqingzhaoexecutendeendeend
Object actdisableliqingzhao: TACTION
Category = 'control'
Caption = 'prohibits Li Qingzhao'
Onexecute = actdisableliqingzhaoexecute
end
Object ACTHIDELIQINGZHAO: TACTION
Category = 'control'
Caption = 'Hide Li Qingzhao'
Onexecute = ACTHIDELIQINGZHAOEXECUTE
end
end
Object ImageList: Timagelist
LEFT = 388
TOP = 4
Bitmap = {......}
