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Managing GUI Data with the Handles Structure
4-29
Application Data
Application data provides a way for applications to save and retrieve data
stored with the GUI. This technique enables you to create what is essentially
a user-defined property for an object. You can use this property to store data.
The GUI M-file uses application data to store the
handles structure.
When using the GUIDE-generated M-file, it is simpler to use
guidata than to
access application data directly.
Functions for Accessing Application Data
The following functions provide access to application data.
Functions for Accessing Application-Defined Data
Function Purpose
setappdata
Specify application data
getappdata
Retrieve named application data
isappdata
True if the named application data exists
rmappdata
Remove the named application data
- Version 7 1
- How to Contact The MathWorks: 2
- Contents 3
- Getting Started with 9
- 1 Getting Started with GUIDE 10
- Starting GUIDE 11
- The Layout Editor 13
- GUIDE Templates 15
- GUI FIG-Files and M-Files 17
- Programming the GUI M-file 19
- Creating a GUI 23
- 2 Creating a GUI 24
- Laying Out the GUI 25
- Add the Components 29
- Align the Components 31
- Name Property 33
- Programming the GUI 39
- % hObject handle to figure 43
- Surf push button callback: 45
- Mesh push button callback: 45
- Saving and Running a GUI 49
- Laying Out GUIs and 51
- Setting Properties 51
- Using GUIDE Templates 52
- Blank GUI 53
- GUI with Uicontrols 54
- GUI with Axes and Menu 55
- Modal Question Dialog 56
- Yes and No push buttons: 58
- Using the Layout Editor 59
- Layout Area 60
- Push Button 61
- Toggle Button 61
- Radio Button 61
- Check Box 61
- Edit Text 61
- Button Group 63
- ActiveX Component 63
- Adding an ActiveX Control 66
- Selecting Components 67
- Moving Components 67
- Saving the Layout 71
- Renaming GUI Files 71
- Layout Editor Preferences 72
- Displaying the GUI 72
- Layout Editor Context Menus 73
- Component Context Menus 74
- Selecting GUI Options 75
- Resize Behavior 76
- Command-Line Accessibility 77
- Access Options 78
- Generate FIG-File and M-File 79
- Naming Callback Subfunctions 80
- Callback Function Syntax 80
- Generate FIG-File Only 83
- Align Options 85
- Grids and Rulers 86
- Creating Guide Lines 87
- Front-to-Back Positioning 88
- Inspect Properties from the 90
- Some Commonly Used Properties 92
- Callback 93
- Setting List Box Properties 94
- Setting Slider Properties 95
- Callback Properties 101
- Changing a Tag 103
- Changing Callback Properties 103
- Creating a Menu 108
- Specifying Menu Properties 108
- Adding Items to a Menu 109
- Laying Out Three Menus 111
- Menu Callbacks 113
- Select All uimenu item 114
- Defining Context Menus 115
- New Menu Item 116
- UIContextMenu property 118
- 1 Surf push button 120
- 2 Contour push button 120
- 3 Mesh push button 120
- Programming GUIs 121
- 4 Programming GUIs 122
- Accessing GUI Data 123
- Output Function 125
- Input and Output Arguments 127
- Radio Buttons 129
- List Boxes 131
- Button Groups 133
- ActiveX Controls 137
- Layout Editor and select 139
- M-file Editor 141
- Application Data 149
- Specifying a Fixed-Width Font 151
- Using a Specific Font Name 151
- Types of Callbacks 153
- Controlling Interruptibility 155
- The Event Queue 155
- BusyAction 157
- Dismissing a Modal Figure 159
- GUI Applications 167
- 5 GUI Applications 168
- Design of the GUI 169
- GUI Option Settings 171
- Plot Button Code Listing 173
- List Box Directory Reader 175
- Loading the List Box 177
- Enabling Multiple Selection 183
- Running the GUI 187
- 'Value'); 189
- 'String',NewVal) 189
- Plotting the Results Data 193
- The GUI Help Button 195
- Closing the GUI 195
- An Address Book Reader 197
- Calling the GUI 199
- Check_And_Load Code Listing 201
- Storing and Retrieving Data 203
- Contact Name Callback 203
- Code Listing 205
- Save or Save As 207
- The Create New Menu 209
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