Home » Eclipse Projects » Standard Widget Toolkit (SWT) » Questions about the SWT Browser(Looking to mimic common browser functionality in the SWT Browser)
| Questions about the SWT Browser [message #1753911] |
Sun, 12 February 2017 09:09 |
 Tim Fielder
Messages: 1
Registered: February 2017 |
Junior Member |
|
|
I'm trying to build a browser as part of a larger project I'm working on, and I'm having trouble replicating some standard modern browser functionality, and some less-standard functionality. Specifically, I am trying to do the following four things:
1) When I middle-click on a page that has scrolling enabled, it shows the drag-scrolling widget. I want to turn this feature off, but there doesn't appear to be any way to get or change the state of the drag-scrolling feature in the Browser class. This is the most critical one. If I can do this, the others I can deal with.
2) I would like to be able to get a list of all linked pages (all hrefs, at least) and maybe all linked objects. If I need to, I can just pull the html from getText() when the ProgressListener fires the completed event, but I thought I'd ask if this is built-in before I build an HTML parser.
3) I actually got the browser to open a new tab when you middle-click on a link, like other browsers do, but there's a feature that is found in certain addons that allows opening multiple links at once using a drag (Linkclump for Chrome, Snap Links for Firefox). Since so little of the Browser is exposed, I doubt that there's any reasonable way to get the collection of links within an area, but maybe there's a way to do it using BrowserFunction?
4) Is there a way that I can turn mouse wheel scrolling on and off?
Thanks in advance.
Full code (yes I need to clean it up because that one method is a monster, my apologies):
import org.eclipse.swt.*;
import org.eclipse.swt.browser.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Browser_Test {
//private final String gBlankPage = "<html><head></head><body></body></html>";
private String gStatusText;
public Browser_Test()
{
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new FormLayout());
shell.setMaximized(true);
FormData data;
final Label label = new Label(shell, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(98, 0);
data.bottom = new FormAttachment(100, 0);
data.left = new FormAttachment(3, 0);
data.right = new FormAttachment(75, 0);
label.setLayoutData(data);
final ProgressBar bar = new ProgressBar(shell, SWT.SMOOTH);
data = new FormData();
data.top = new FormAttachment(98, 0);
data.bottom = new FormAttachment(99, 0);
data.left = new FormAttachment(75, 0);
data.right = new FormAttachment(97, 0);
bar.setLayoutData(data);
final TabFolder tabs = new TabFolder(shell, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(3, 0);
data.bottom = new FormAttachment(97, 0);
data.left = new FormAttachment(0, 0);
data.right = new FormAttachment(100, 0);
tabs.setLayoutData(data);
Menu menu = new Menu(shell, SWT.BAR);
shell.setMenuBar(menu);
MenuItem fileMenuItem = new MenuItem(menu, SWT.CASCADE);
fileMenuItem.setText("&File");
Menu fileMenu = new Menu(shell, SWT.DROP_DOWN);
fileMenuItem.setMenu(fileMenu);
MenuItem closeWindowMenuItem = new MenuItem(fileMenu, SWT.PUSH);
closeWindowMenuItem.setText("Close Tab\tCtrl+W");
closeWindowMenuItem.setAccelerator(SWT.MOD1 + 'W');
closeWindowMenuItem.addListener(SWT.Selection, new Listener()
{
public void handleEvent(Event event)
{
display.dispose();
}
});
MenuItem navMenuItem = new MenuItem(menu, SWT.CASCADE);
navMenuItem.setText("&Navigation");
Menu navMenu = new Menu(shell, SWT.DROP_DOWN);
navMenuItem.setMenu(navMenu);
MenuItem backMenuItem = new MenuItem(navMenu, SWT.PUSH);
backMenuItem.setText("Back\tBackspace");
backMenuItem.setAccelerator(SWT.BS);
MenuItem forwardMenuItem = new MenuItem(navMenu, SWT.PUSH);
forwardMenuItem.setText("Forward\tShift+Backspace");
forwardMenuItem.setAccelerator(SWT.MOD2 + SWT.BS);
MenuItem newTabMenuItem = new MenuItem(navMenu, SWT.PUSH);
newTabMenuItem.setText("New Tab\tCtrl+T");
newTabMenuItem.setAccelerator(SWT.MOD1 + 'T');
MenuItem closeTabMenuItem = new MenuItem(navMenu, SWT.PUSH);
closeTabMenuItem.setText("Close Tab\tCtrl+W");
closeTabMenuItem.setAccelerator(SWT.MOD1 + 'W');
closeTabMenuItem.addListener(SWT.Selection, new Listener()
{
public void handleEvent(Event event)
{
tabs.getItems()[tabs.getSelectionIndex()].dispose();
if (tabs.getItemCount() == 0)
{
display.dispose();
}
}
});
Button button = new Button(shell, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(0, 0);
data.bottom = new FormAttachment(3, 0);
data.left = new FormAttachment(0, 0);
data.right = new FormAttachment(5, 0);
button.setLayoutData(data);
button.setText("Back");
button.addSelectionListener(new SelectionListener()
{
public void widgetDefaultSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
if (b.isBackEnabled())
{
b.back();
}
}
public void widgetSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
if (b.isBackEnabled())
{
b.back();
}
}
});
button = new Button(shell, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(0, 0);
data.bottom = new FormAttachment(3, 0);
data.left = new FormAttachment(5, 0);
data.right = new FormAttachment(10, 0);
button.setLayoutData(data);
button.setText("Forward");
button.addSelectionListener(new SelectionListener()
{
public void widgetDefaultSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
if (b.isForwardEnabled())
{
b.forward();
}
}
public void widgetSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
if (b.isForwardEnabled())
{
b.forward();
}
}
});
button = new Button(shell, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(0, 0);
data.bottom = new FormAttachment(3, 0);
data.left = new FormAttachment(10, 0);
data.right = new FormAttachment(15, 0);
button.setLayoutData(data);
button.setText("Home");
button.addSelectionListener(new SelectionListener()
{
public void widgetDefaultSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
b.setUrl("http://www.google.com");
}
public void widgetSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
b.setUrl("http://www.google.com");
}
});
button = new Button(shell, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(0, 0);
data.bottom = new FormAttachment(3, 0);
data.left = new FormAttachment(15, 0);
data.right = new FormAttachment(20, 0);
button.setLayoutData(data);
button.setText("Reload");
button.addSelectionListener(new SelectionListener()
{
public void widgetDefaultSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
b.refresh();
}
public void widgetSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
b.refresh();
}
});
button = new Button(shell, SWT.NONE);
data = new FormData();
data.top = new FormAttachment(0, 0);
data.bottom = new FormAttachment(3, 0);
data.left = new FormAttachment(20, 0);
data.right = new FormAttachment(25, 0);
button.setLayoutData(data);
button.setText("Stop");
button.addSelectionListener(new SelectionListener()
{
public void widgetDefaultSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
b.stop();
}
public void widgetSelected(SelectionEvent event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
b.stop();
}
});
final Text address = new Text(shell, SWT.BORDER);
data = new FormData();
data.top = new FormAttachment(0, 0);
data.bottom = new FormAttachment(3, 0);
data.left = new FormAttachment(25, 0);
data.right = new FormAttachment(100, 0);
address.setLayoutData(data);
address.setText("http://www.google.com");
address.addKeyListener(new KeyListener()
{
@Override
public void keyPressed(KeyEvent event)
{
if(event.keyCode == SWT.CR || event.keyCode == SWT.LF)
{
((Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl()).setUrl(((Text)event.widget).getText());
}
}
@Override
public void keyReleased(KeyEvent event)
{
}
});
newTabMenuItem.addListener(SWT.Selection, new Listener()
{
public void handleEvent(Event event)
{
newTab(tabs, label, bar, address, "http://www.google.com");
}
});
backMenuItem.addListener(SWT.Selection, new Listener()
{
public void handleEvent(Event event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
if (b.isBackEnabled())
{
b.back();
}
}
});
forwardMenuItem.addListener(SWT.Selection, new Listener()
{
public void handleEvent(Event event)
{
Browser b = (Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl();
if (b.isForwardEnabled())
{
b.forward();
}
}
});
tabs.addMouseListener(new MouseListener()
{
public void mouseDoubleClick(MouseEvent event)
{
if (event.button == 1)
{
newTab(tabs, label, bar, address, "http://www.google.com");
}
}
public void mouseDown(MouseEvent event)
{
if (event.button == 2)
{
boolean closed = false;
for (int i = 0; i < tabs.getItems().length; i++)
{
Rectangle rect = tabs.getItems()[i].getBounds();
if (event.x > rect.x && event.x < rect.x + rect.width)
{
tabs.getItems()[i].dispose();
closed = true;
break;
}
}
if (tabs.getItemCount() == 0)
{
display.dispose();
}
if (!closed)
{
newTab(tabs, label, bar, address, "http://www.google.com");
}
}
}
public void mouseUp(MouseEvent event)
{
}
});
tabs.addSelectionListener(new SelectionListener()
{
public void widgetDefaultSelected(SelectionEvent event)
{
if ((Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl() != null)
{
address.setText(((Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl()).getUrl());
}
}
public void widgetSelected(SelectionEvent event)
{
if ((Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl() != null)
{
address.setText(((Browser)tabs.getItems()[tabs.getSelectionIndex()].getControl()).getUrl());
}
}
});
newTab(tabs, label, bar, address, "http://www.google.com");
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private Browser newTab(final TabFolder tabs, final Label label, final ProgressBar bar, final Text address, final String url)
{
bar.setVisible(true);
final TabItem tab = new TabItem(tabs, SWT.NONE);
final Browser browser = new Browser(tabs, SWT.NONE);
tab.setControl(browser);
browser.setUrl(url);
browser.addTitleListener(new TitleListener()
{
@Override
public void changed(TitleEvent event)
{
tab.setText(event.title);
}
});
browser.addStatusTextListener(new StatusTextListener()
{
public void changed(StatusTextEvent event)
{
if (tabs.getItems()[tabs.getSelectionIndex()] == tab)
{
label.setText(event.text);
gStatusText = event.text;
}
}
});
browser.addProgressListener(new ProgressListener()
{
public void changed(ProgressEvent event)
{
if (tabs.getItems()[tabs.getSelectionIndex()] == tab)
{
bar.setMinimum(0);
bar.setMaximum(event.total);
bar.setState(event.current);
}
}
public void completed(ProgressEvent event)
{
if (tabs.getItems()[tabs.getSelectionIndex()] == tab)
{
bar.setVisible(false);
}
System.out.println(browser.getText());
}
});
browser.addLocationListener(new LocationListener()
{
public void changed(LocationEvent event)
{
address.setText(browser.getUrl());
}
public void changing(LocationEvent event)
{
address.setText(browser.getUrl());
}
});
browser.addMouseListener(new MouseListener()
{
public void mouseDoubleClick(MouseEvent event)
{
}
public void mouseDown(MouseEvent event)
{
//System.out.println(gStatusText);
if (event.button == 2 && gStatusText.toLowerCase().startsWith("http"))
{
newTab(tabs, label, bar, address, gStatusText);
}
}
public void mouseUp(MouseEvent event)
{
}
});
return browser;
}
public static void main(String[] args)
{
new Browser_Test();
}
}
|
|
|
Goto Forum:
Current Time: Thu Apr 25 14:03:22 GMT 2024
Powered by FUDForum. Page generated in 0.03085 seconds |
] 
Search
Help
Register
Login
Home
