в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

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2010-05-31T15:22:15Z

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* [[Java Tutorial/SWT/ApplicationWindow | ApplicationWindow]]
* [[Java Tutorial/SWT/Browser | Browser]]
* [[Java Tutorial/SWT/BusyIndicator | BusyIndicator]]
* [[Java Tutorial/SWT/Button | Button]]
* [[Java Tutorial/SWT/Button Event | Button Event]]
* [[Java Tutorial/SWT/CLabel | CLabel]]
* [[Java Tutorial/SWT/CTabFolder | CTabFolder]]
* [[Java Tutorial/SWT/CTabItem | CTabItem]]
* [[Java Tutorial/SWT/Canvas | Canvas]]
* [[Java Tutorial/SWT/Caret | Caret]]
* [[Java Tutorial/SWT/Clipboard | Clipboard]]
* [[Java Tutorial/SWT/ColorDialog | ColorDialog]]
* [[Java Tutorial/SWT/Combo | Combo]]
* [[Java Tutorial/SWT/Combo Event | Combo Event]]
* [[Java Tutorial/SWT/CommonDialog | CommonDialog]]
* [[Java Tutorial/SWT/Composite | Composite]]
* [[Java Tutorial/SWT/ControlEditor | ControlEditor]]
* [[Java Tutorial/SWT/CoolBar | CoolBar]]
* [[Java Tutorial/SWT/CoolItem | CoolItem]]
* [[Java Tutorial/SWT/Custom Layout | Custom Layout]]
* [[Java Tutorial/SWT/DateTime | DateTime]]
* [[Java Tutorial/SWT/Decorations | Decorations]]
* [[Java Tutorial/SWT/Device | Device]]
* [[Java Tutorial/SWT/Dialog | Dialog]]
* [[Java Tutorial/SWT/DirectoryDialog | DirectoryDialog]]
* [[Java Tutorial/SWT/Display | Display]]
* [[Java Tutorial/SWT/ExpandBar | ExpandBar]]
* [[Java Tutorial/SWT/File Tree | File Tree]]
* [[Java Tutorial/SWT/FileDialog | FileDialog]]
* [[Java Tutorial/SWT/FillLayout | FillLayout]]
* [[Java Tutorial/SWT/FocusEvent | FocusEvent]]
* [[Java Tutorial/SWT/FormLayout | FormLayout]]
* [[Java Tutorial/SWT/GridData | GridData]]
* [[Java Tutorial/SWT/GridLayout | GridLayout]]
* [[Java Tutorial/SWT/Group | Group]]
* [[Java Tutorial/SWT/ImageRegistry | ImageRegistry]]
* [[Java Tutorial/SWT/JFace Introduction | JFace Introduction]]
* [[Java Tutorial/SWT/KeyEvent | KeyEvent]]
* [[Java Tutorial/SWT/Label | Label]]
* [[Java Tutorial/SWT/Layout Basics | Layout Basics]]
* [[Java Tutorial/SWT/Link | Link]]
* [[Java Tutorial/SWT/List | List]]
* [[Java Tutorial/SWT/List Event | List Event]]
* [[Java Tutorial/SWT/Menu | Menu]]
* [[Java Tutorial/SWT/MenuEvent | MenuEvent]]
* [[Java Tutorial/SWT/MenuItem | MenuItem]]
* [[Java Tutorial/SWT/MenuItem Event | MenuItem Event]]
* [[Java Tutorial/SWT/MessageBox | MessageBox]]
* [[Java Tutorial/SWT/MouseEvent | MouseEvent]]
* [[Java Tutorial/SWT/PasswordField | PasswordField]]
* [[Java Tutorial/SWT/PopupList | PopupList]]
* [[Java Tutorial/SWT/PopupMenu | PopupMenu]]
* [[Java Tutorial/SWT/Print | Print]]
* [[Java Tutorial/SWT/PrintDialog | PrintDialog]]
* [[Java Tutorial/SWT/PrinterData | PrinterData]]
* [[Java Tutorial/SWT/Program | Program]]
* [[Java Tutorial/SWT/ProgressBar | ProgressBar]]
* [[Java Tutorial/SWT/RowLayout | RowLayout]]
* [[Java Tutorial/SWT/SWT AWT Swing | SWT AWT Swing]]
* [[Java Tutorial/SWT/SWT Basics | SWT Basics]]
* [[Java Tutorial/SWT/SWT Color | SWT Color]]
* [[Java Tutorial/SWT/SWT Cursor | SWT Cursor]]
* [[Java Tutorial/SWT/SWT Drag Drop | SWT Drag Drop]]
* [[Java Tutorial/SWT/SWT Event | SWT Event]]
* [[Java Tutorial/SWT/SWT Image | SWT Image]]
* [[Java Tutorial/SWT/SWT NO Layout | SWT NO Layout]]
* [[Java Tutorial/SWT/SWT Thread | SWT Thread]]
* [[Java Tutorial/SWT/SWT Timer | SWT Timer]]
* [[Java Tutorial/SWT/Sash | Sash]]
* [[Java Tutorial/SWT/Sash Event | Sash Event]]
* [[Java Tutorial/SWT/SashForm | SashForm]]
* [[Java Tutorial/SWT/Scale | Scale]]
* [[Java Tutorial/SWT/Screen Capture | Screen Capture]]
* [[Java Tutorial/SWT/ScrollBar | ScrollBar]]
* [[Java Tutorial/SWT/ScrollBar Event | ScrollBar Event]]
* [[Java Tutorial/SWT/ScrolledComposite | ScrolledComposite]]
* [[Java Tutorial/SWT/Separator | Separator]]
* [[Java Tutorial/SWT/Shell | Shell]]
* [[Java Tutorial/SWT/Shell Event | Shell Event]]
* [[Java Tutorial/SWT/Slider | Slider]]
* [[Java Tutorial/SWT/Slider Event | Slider Event]]
* [[Java Tutorial/SWT/Spinner | Spinner]]
* [[Java Tutorial/SWT/Spinner Event | Spinner Event]]
* [[Java Tutorial/SWT/Splash Screen | Splash Screen]]
* [[Java Tutorial/SWT/StackLayout | StackLayout]]
* [[Java Tutorial/SWT/StyledText | StyledText]]
* [[Java Tutorial/SWT/StyledText Action | StyledText Action]]
* [[Java Tutorial/SWT/StyledText Event | StyledText Event]]
* [[Java Tutorial/SWT/StyledText Format | StyledText Format]]
* [[Java Tutorial/SWT/StyledText LineStyle | StyledText LineStyle]]
* [[Java Tutorial/SWT/StyledText Style | StyledText Style]]
* [[Java Tutorial/SWT/System Tray | System Tray]]
* [[Java Tutorial/SWT/TabFolder | TabFolder]]
* [[Java Tutorial/SWT/TabItem | TabItem]]
* [[Java Tutorial/SWT/TabSequence | TabSequence]]
* [[Java Tutorial/SWT/Table | Table]]
* [[Java Tutorial/SWT/Table Cursor | Table Cursor]]
* [[Java Tutorial/SWT/Table Editor | Table Editor]]
* [[Java Tutorial/SWT/Table Event | Table Event]]
* [[Java Tutorial/SWT/Table Renderer | Table Renderer]]
* [[Java Tutorial/SWT/Table Sort | Table Sort]]
* [[Java Tutorial/SWT/TableColumn | TableColumn]]
* [[Java Tutorial/SWT/TableItem | TableItem]]
* [[Java Tutorial/SWT/Text | Text]]
* [[Java Tutorial/SWT/Text Event | Text Event]]
* [[Java Tutorial/SWT/TextLayout | TextLayout]]
* [[Java Tutorial/SWT/ToolBar | ToolBar]]
* [[Java Tutorial/SWT/ToolItem | ToolItem]]
* [[Java Tutorial/SWT/ToolTip | ToolTip]]
* [[Java Tutorial/SWT/Tooltip Balloon | Tooltip Balloon]]
* [[Java Tutorial/SWT/Tracker | Tracker]]
* [[Java Tutorial/SWT/Tree | Tree]]
* [[Java Tutorial/SWT/Tree Editor | Tree Editor]]
* [[Java Tutorial/SWT/Tree Event | Tree Event]]
* [[Java Tutorial/SWT/TreeColumn TreeTable | TreeColumn TreeTable]]
* [[Java Tutorial/SWT/TreeItem | TreeItem]]
* [[Java Tutorial/SWT/TreeViewer | TreeViewer]]
* [[Java Tutorial/SWT/UI Auto | UI Auto]]
* [[Java Tutorial/SWT/ViewForm | ViewForm]]
* [[Java Tutorial/SWT/WIN32 | WIN32]]
* [[Java Tutorial/SWT/Widget | Widget]]
* [[Java Tutorial/SWT/WindowManagers | WindowManagers]]

== 17. Choosing a Font ==

SWT provides the FontDialog class to display the common font selection dialog.
FontDialog"s open() method returns a FontData object (or null if the user cancels the dialog), which you can use to create a Font.
SWT uses two classes to represent fonts:
<OL><LI>Font represents the onscreen font, and</LI><LI>Font objects represent operating system resources, and you must dispose any you create.</LI><LI>FontData represents the data used to construct the onscreen font.</LI><LI>FontData objects contain only data, and aren"t operating system resources, so they aren"t disposed.</LI></OL>



<source lang="java">
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FontDialog;
import org.eclipse.swt.widgets.Shell;
public class FontSelectionDialogDisplay {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
FontDialog dlg = new FontDialog(shell);
FontData fontData = dlg.open();
if (fontData != null) {
Font font = new Font(shell.getDisplay(), fontData);
font.dispose();
}

display.dispose();
}
}</source>



Caution: Don"t dispose a font while your application is still using it.

== 17. Construct a FontData object ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class FontDataConstruct {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("Canvas Example");
shell.setLayout(new FillLayout());
Canvas canvas = new Canvas(shell, SWT.NONE);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {

Font font = new Font(shell.getDisplay(), new FontData("Helvetica", 18, SWT.NORMAL));
e.gc.setFont(font);
e.gc.drawText("My Text", 0, 0);
font.dispose();
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



== Create Larger Font ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class FontLargerCreate {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
Text text = new Text(shell, SWT.MULTI|SWT.BORDER);
text.setBounds(10, 10, 150, 150);
Font initialFont = text.getFont();
FontData[] fontData = initialFont.getFontData();
for (int i = 0; i < fontData.length; i++) {
fontData[i].setHeight(24);
}
Font newFont = new Font(display, fontData);
text.setFont(newFont);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
newFont.dispose();
display.dispose();
}
}</source>



== 17. To use the font selection dialog to change both the font and the color of a label ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.FontDialog;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
public class FontDialogColorFontData {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("Font Chooser");
shell.setLayout(new GridLayout(2, false));
final Label fontLabel = new Label(shell, SWT.NONE);
fontLabel.setText("The selected font");
Button button = new Button(shell, SWT.PUSH);
button.setText("Font...");
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
Font font = null;
Color color = null;
FontDialog dlg = new FontDialog(shell);
if (font != null)
dlg.setFontList(fontLabel.getFont().getFontData());
if (color != null)
dlg.setRGB(color.getRGB());
if (dlg.open() != null) {
if (font != null)
font.dispose();
if (color != null)
color.dispose();
font = new Font(shell.getDisplay(), dlg.getFontList());
fontLabel.setFont(font);
color = new Color(shell.getDisplay(), dlg.getRGB());
fontLabel.setForeground(color);
shell.pack();
if (font != null)
font.dispose();
if (color != null)
color.dispose();
}
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



== 17. Using the FontRegistry ==

<OL><LI>FontData class is a lightweight class describing system fonts.</LI><LI>A FontData to a Font is analogous to an ImageDescriptor to an Image.</LI><LI>A FontData class describes the following properties of a Font:</LI></OL>
<OL><LI>name</LI><LI>height</LI><LI>style: combination of SWT.NORMAL, SWT.ITALIC, and SWT.BOLD</LI></OL>
The Font itself is resource-based, i.e., if you create it, you must dispose of it.
You can use FontRegistry to manage allocation and disposal of the fonts.



<source lang="java">
import org.eclipse.jface.resource.FontRegistry;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.FontData;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class FontRegistry {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell();
shell.setLayout(new GridLayout(1, false));
FontRegistry fontRegistry = new FontRegistry(display);
fontRegistry.put("button-text", new FontData[] { new FontData("Arial", 9, SWT.BOLD) });
fontRegistry.put("code", new FontData[] { new FontData("Courier New", 10, SWT.NORMAL) });
Text text = new Text(shell, SWT.MULTI | SWT.BORDER | SWT.WRAP);
text.setFont(fontRegistry.get("code"));
text.setForeground(display.getSystemColor(SWT.COLOR_BLUE));
text.setText("");
GridData gd = new GridData(GridData.FILL_BOTH);
gd.horizontalSpan = 2;
text.setLayoutData(gd);
Button executeButton = new Button(shell, SWT.PUSH);
executeButton.setText("Execute");
executeButton.setFont(fontRegistry.get("button-text"));
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>

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