iv
Properties of memo and rich text
controls. . . . . . . . . . . . . . . . . . .3-31
Rich text controls (VCL only) . . . . . . . 3-32
Specialized input controls . . . . . . . . . . .3-32
Scroll bars . . . . . . . . . . . . . . . . . .3-32
Track bars . . . . . . . . . . . . . . . . . .3-33
Up-down controls (VCL only). . . . . . . 3-33
Spin edit controls (CLX only) . . . . . . .3-33
Hot key controls (VCL only). . . . . . . .3-33
Splitter controls . . . . . . . . . . . . . . .3-34
Buttons and similar controls . . . . . . . . .3-34
Button controls . . . . . . . . . . . . . . . 3-34
Bitmap buttons . . . . . . . . . . . . . . . 3-35
Speed buttons . . . . . . . . . . . . . . . . 3-35
Check boxes . . . . . . . . . . . . . . . . .3-35
Radio buttons . . . . . . . . . . . . . . . .3-35
Toolbars . . . . . . . . . . . . . . . . . . .3-36
Cool bars (VCL only) . . . . . . . . . . . .3-36
Handling lists . . . . . . . . . . . . . . . . . .3-36
List boxes and check-list boxes . . . . . . 3-37
Combo boxes . . . . . . . . . . . . . . . .3-37
Tree views . . . . . . . . . . . . . . . . . . 3-38
List views . . . . . . . . . . . . . . . . . .3-38
Date-time pickers and month
calendars (VCL only) . . . . . . . . . . .3-39
Grouping components . . . . . . . . . . . . .3-39
Group boxes and radio groups . . . . . .3-39
Panels . . . . . . . . . . . . . . . . . . . .3-39
Scroll boxes . . . . . . . . . . . . . . . . .3-40
Tab controls . . . . . . . . . . . . . . . . .3-40
Page controls . . . . . . . . . . . . . . . .3-40
Header controls . . . . . . . . . . . . . . . 3-41
Providing visual feedback. . . . . . . . . . .3-41
Labels and static text components . . . . 3-41
Status bars . . . . . . . . . . . . . . . . . . 3-42
Progress bars . . . . . . . . . . . . . . . .3-42
Help and hint properties . . . . . . . . . . 3-42
Grids . . . . . . . . . . . . . . . . . . . . . . . 3-43
Draw grids. . . . . . . . . . . . . . . . . .3-43
String grids . . . . . . . . . . . . . . . . .3-43
Value list editors (VCL only) . . . . . . . . .3-43
Displaying graphics . . . . . . . . . . . . . .3-44
Images . . . . . . . . . . . . . . . . . . . .3-44
Shapes . . . . . . . . . . . . . . . . . . . . 3-44
Bevels . . . . . . . . . . . . . . . . . . . .3-45
Paint boxes. . . . . . . . . . . . . . . . . .3-45
Animation control (VCL only). . . . . . .3-45
Developing dialog boxes . . . . . . . . . . .3-45
Using open dialog boxes . . . . . . . . . . 3-46
Using helper objects . . . . . . . . . . . . . . . 3-46
Working with lists . . . . . . . . . . . . . . . 3-47
Working with string lists . . . . . . . . . . . 3-47
Loading and saving string lists. . . . . . 3-48
Creating a new string list . . . . . . . . . 3-48
Manipulating strings in a list . . . . . . . 3-50
Associating objects with a string list. . . 3-52
Windows registry and INI files . . . . . . . 3-52
Using TIniFile (VCL only) . . . . . . . . 3-52
Using TRegistry . . . . . . . . . . . . . . 3-53
Using TRegIniFile . . . . . . . . . . . . . 3-53
Creating drawing spaces . . . . . . . . . . . 3-54
Printing . . . . . . . . . . . . . . . . . . . . . 3-54
Using streams . . . . . . . . . . . . . . . . . 3-55
Chapter 4
Common programming tasks 4-1
Understanding classes . . . . . . . . . . . . . . . 4-1
Defining classes . . . . . . . . . . . . . . . . . . . 4-2
Handling exceptions . . . . . . . . . . . . . . . . 4-4
Protecting blocks of code . . . . . . . . . . . . 4-4
Responding to exceptions. . . . . . . . . . 4-5
Exceptions and the flow of control. . . . . 4-6
Nesting exception responses . . . . . . . . 4-6
Protecting resource allocations. . . . . . . . . 4-7
What kind of resources need
protection? . . . . . . . . . . . . . . . . . 4-7
Creating a resource protection block. . . . 4-8
Handling RTL exceptions. . . . . . . . . . . . 4-9
What are RTL exceptions? . . . . . . . . . 4-9
Creating an exception handler . . . . . . 4-10
Exception handling statements. . . . . . 4-11
Using the exception instance . . . . . . . 4-11
Scope of exception handlers . . . . . . . 4-12
Providing default exception
handlers . . . . . . . . . . . . . . . . . . 4-12
Handling classes of exceptions . . . . . . 4-13
Reraising the exception . . . . . . . . . . 4-13
Handling component exceptions . . . . . . 4-14
Exception handling with external
sources . . . . . . . . . . . . . . . . . . . . 4-15
Silent exceptions. . . . . . . . . . . . . . . . 4-15
Defining your own exceptions. . . . . . . . 4-16
Declaring an exception object type. . . . 4-16
Raising an exception. . . . . . . . . . . . 4-17
Using interfaces . . . . . . . . . . . . . . . . . . 4-17
Interfaces as a language feature . . . . . . . 4-18
Implementing interfaces across
the hierarchy . . . . . . . . . . . . . . . 4-18
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夏天_云2014-03-24英文给力版、扛着字典看T T
