Construção de Interfaces Gráficas Programa/Utilizador

Transcrição

1 Construção de Interfaces Gráficas Programa/Utilizador Componentes das GUIs no MATLAB Estrutura da m-file para uma GUI Elementos de estilo Casos de Estudo Instituto Superior Técnico, Dep. de Engenharia Mecânica - ACCAII Exemplo: GUI controlsuite Disponível na pasta do MATLAB, subdirectoria "..\help\techdoc\creating_guis\examples" Abrir pela linha de comandos utilizando: guide controlsuite 2 1

2 Exemplo: GUI controlsuite 3 Exemplo: GUI controlsuite 4 2

3 Editor de GUIs: guide GUI do guide Editor de Toolbars de GUIs Toolbar do guide Componentes de GUIs 5 Componentes disponíveis no guide 6 3

4 Componente: Push Button Push Button Push buttons generate an action when clicked. For example, an OK button might apply settings and close a dialog box. When you click a push button, it appears depressed; when you release the mouse button, the push button appears raised. 7 Componente: Slider Slider Sliders accept numeric input within a specified range by enabling the user to move a sliding bar, which is called a slider or thumb. Users move the slider by clicking the slider and dragging it, by clicking in the trough, or by clicking an arrow. The location of the slider indicates the relative location within the specified range. 8 4

5 Componente: Radio Button Radio Button Radio buttons are similar to check boxes, but radio buttons are typically mutually exclusive within a group of related radio buttons. That is, when you select one button the previously selected button is deselected. To activate a radiobutton, click the mouse button on the object. The display indicates the state of the button. Use a button group to manage mutually exclusive radio buttons. 9 Componente: Check Box Check Box Check boxes can generate an action when checked and indicate their state as checked or not checked. Check boxes are useful when providing the user with a number of independent choices, for example, displaying a toolbar. 10 5

6 Componente: Edit Text Edit Text Edit text components are fields that enable users to enter or modify text strings. Use edit text when you want text as input. Users can enter numbers but you must convert them to their numeric equivalents. 11 Componente: Static Text Static Text Static text controls display lines of text. Statictext is typically used to label other controls, provide directions to the user, or indicate values associated with a slider. Users cannot changestatic text interactively. 12 6

7 Componente: Pop-Up Menu Pop-Up Menu Pop-up menus open to display a list of choices when users click the arrow. 13 Componente: List Box List Box List boxes display a list of items and enable users to select one or more items. 14 7

8 Componente: Toggle Button Toggle Button Toggle buttons generate an action and indicate whether they are turned on or off. When you clicka toggle button, it appears depressed, showingthat it is on. When you release the mouse button,the toggle button remains depressed until you click it a second time. When you do so, the buttonreturns to the raised state, showing that it is off. Use a button group to manage mutually exclusive toggle buttons. 15 Componente: Table Table Use the table button to create a table component. (Refer to the uitable function for more information on using this component.) 16 8

9 Componente: Axes Axes Axes enable your GUI to display graphics such as graphs and images. Like all graphics objects, axes have properties that you can set to control many aspects of its behavior and appearance(see Axes Properties in the MATLAB Graphics documentation) 17 Componente: Panel Panel Panels arrange GUI components into groups. By visually grouping related controls, panels can make the user interface easier to understand. Apanel can have a title and various borders.panel children can be user interface controls and axes as well as button groups and other panels. The position of each component within a panel is interpreted relative to the panel. If you move the panel, its children move with it and maintain their positions on the panel. 18 9

10 Componente: Button Group Button Group Button groups are like panels but are used to manage exclusive selection behavior for radio buttons and toggle buttons. 19 Componente: Toolbar Toolbar GUIDE Toolbar Editor You can create toolbars containing push buttons and toggle buttons. Use the GUIDE ToolbarEditor to create toolbar buttons. Choose between predefined buttons, such as Saveand Print, andbuttons which you customize with your own icons and callbacks

11 Estrutura de uma GUI no MATLAB Figure: simple_gui.fig + M-file: simple_gui.m 21 Estrutura padrão da m-file de uma GUI 22 11

12 Exemplo: GUI controlsuite Comments 23 Exemplo: GUI controlsuite Initialization 24 12

13 Opening Function Exemplo: GUI controlsuite 25 Output Function Exemplo: GUI controlsuite 26 13

14 Exemplo: GUI controlsuite Component and figure callbacks (sample) 27 Utility / helper functions Exemplo: GUI controlsuite Não se aplica à GUI controlsuite 28 14

15 Template de uma callback (push button) Declaração da função de callback para a componente que disparou a chamada Argumentos de entrada. A sequência indicada é fixa. 29 Estrutura de dados dos argumentos OBJECT HANDLE (hobject): estrutura com atributos e propriedades (os mesmos visualizáveis no Property Inspector) da componente que disparou a callback. EVENT DATA (eventdata): estrutura com o histórico da sequência de evento até ao disparo da callback (não é utilizado por todas as componentes). HANDLES STRUCTURE (handles): apontador para uma estrutura com atributos e propriedades (os mesmos visualizáveis no Property Inspector) de todas as componentes existentes na GUI, bem como dados específicos da aplicação 30 15

16 Exemplo: GUI controlsuite 31 Exemplo: GUI controlsuite Push Button Toggle Button Ver os callbacks dos restantes componentes no ficheiro

17 Elementos de Estilo Effective interfaces are visually apparent and forgiving, instilling in their users a sense of control. Users quickly see the breadth of their options, grasp how to achieve their goals, and do their work. Efficient interfaces do not concern the user with the inner workings of the system. Effective applications and services perform a maximum of work, while requiring a minimum of information from users Elementos de Estilo "Less is more" Mies van der Rohe (while citing a poem by Robert Browning) 34 17

18 Casos de Estudo Desenvolver uma GUI que implementa uma máquina de somar. Analisar as seguintes GUIs (abrir pela linha de comandos) Simple GUI (>> guide simple_gui) controlsuite (>> guide controlsuite) Disponiveis na pasta do MATLAB, subdirectoria "..\help\techdoc\creating_guis\examples" 35 Referências Mathworks: Creating Graphical User Interfaces (buildgui.pdf) Elementos de estilo: