Bugzilla – Full Text Bug Listing
| Summary: | [Widgets] Link widgets flickers on resize | ||
|---|---|---|---|
| Product: | [Eclipse Project] Platform | Reporter: | Michael Schneider <michschn> |
| Component: | SWT | Assignee: | Platform-SWT-Inbox <platform-swt-inbox> |
| Status: | CLOSED WONTFIX | QA Contact: | Felipe Heidrich <eclipse.felipe> |
| Severity: | normal | ||
| Priority: | P3 | CC: | snorthov |
| Version: | 3.3 | Keywords: | triaged |
| Target Milestone: | --- | ||
| Hardware: | PC | ||
| OS: | Windows XP | ||
| Whiteboard: | stalebug | ||
Note that setBackgroundImage() and setBackgroundMode() are being used. Do they flicker without this? Win32 SysLink just flash a lot (the foreground). I wrote a PI only example to prove it. When you set a image background in the parent it gets worse. It doesn't flash when: -color background in the parent; -image background in the link; -color background in the link. The foreground just always flash. Please attach the code. I'm pretty sure we could work around this by double buffering or getting in the way of WM_SIZE or ... I'm not sure we should try, that's all. Here is the code:
public static void main(String[] args) {
OS.InitCommonControls();
final int hwndShell = OS.CreateWindowEx (
0,
new TCHAR (0, "#32770", true),
null,
OS.WS_VISIBLE | OS.WS_OVERLAPPEDWINDOW,
OS.CW_USEDEFAULT, 0, OS.CW_USEDEFAULT, 0,
0,
0,
OS.GetModuleHandle (null),
null);
int linkFlags = OS.WS_CHILD | OS.WS_VISIBLE;//| OS.WS_CLIPSIBLINGS|OS.SS_NOTIFY| OS.SS_LEFTNOWORDWRAP;
int linkExFlags = 0;
final int hwndLink = OS.CreateWindowEx (
linkExFlags,
new TCHAR (0, "SysLink", true),
new TCHAR (0, "<some> <a>bogus</a> \u2039hi\u203atext", true),
linkFlags,
0,0,0,0,
hwndShell,//parent
0,//menu
OS.GetModuleHandle (null),//instance
null);
// SHELL WINPROC
final int oldProc = OS.GetWindowLong (hwndShell, OS.GWL_WNDPROC);
Object windowProc = new Object () {
public int windowProc (int hwnd, int msg, int wParam, int lParam) {
switch (msg) {
case OS.WM_CLOSE:
OS.PostMessage (hwnd, /*OS.WM_QUIT*/ 0x12, 0, 0);
case OS.WM_SIZE:
RECT rect = new RECT();
OS.GetClientRect(hwndShell, rect);
int flags = OS.SWP_NOMOVE | OS.SWP_NOZORDER | OS.SWP_NOACTIVATE;
OS.SetWindowPos (hwndLink, 0, 0, 0, rect.right - rect.left, rect.bottom - rect.top, flags);
break;
}
return OS.CallWindowProc (oldProc, hwnd, msg, wParam, lParam);
}
};
Callback newProc = new Callback (windowProc, "windowProc", 4);
OS.SetWindowLong (hwndShell, OS.GWL_WNDPROC, newProc.getAddress ());
OS.ShowWindow (hwndShell, OS.SW_SHOW);
MSG msg = new MSG ();
while (OS.GetMessage (msg, 0, 0, 0)) {
OS.TranslateMessage (msg);
OS.DispatchMessage (msg);
}
}
Your bug has been moved to triage, visit http://www.eclipse.org/swt/triage.php for more info. This is a one-off bulk update. (The last one in the triage migration). Moving bugs from swt-triaged@eclipse to platform-swt-inbox@eclipse.org and adding "triaged" keyword as per new triage process: https://wiki.eclipse.org/SWT/Devel/Triage See Bug 518478 for details. Tag for notification/mail filters: @TriageBulkUpdate This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. As such, we're closing this bug. If you have further information on the current state of the bug, please add it and reopen this bug. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant. -- The automated Eclipse Genie. |
Build ID: Build id: I20070503-1400 The flickering can be reproduced using the snippet below, just resize the shell. The flickering is the most obvious when using a background image, but can be seen without too. package org.eclipse.swt.snippets; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.events.ControlListener; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Link; import org.eclipse.swt.widgets.Shell; public class Snippet182 { public static void main(String[] args) { Display display = new Display(); final Image image = new Image (display, 50, 50); GC gc = new GC (image); gc.setForeground(display.getSystemColor (SWT.COLOR_WHITE)); gc.setBackground (display.getSystemColor (SWT.COLOR_GRAY)); gc.fillGradientRectangle(0, 0, 50, 50, true); gc.dispose (); final Shell shell = new Shell(display); shell.setBackgroundImage(image); shell.setBackgroundMode(SWT.INHERIT_FORCE); final Link link = new Link(shell, SWT.NONE); link.setText("This a very simple <A>link</A> widget."); link.setSize(140, 40); shell.addControlListener(new ControlListener() { public void controlMoved(ControlEvent arg0) { } public void controlResized(ControlEvent arg0) { Rectangle clientArea = shell.getClientArea(); link.setSize(clientArea.width, clientArea.height); } }); shell.pack (); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } }