Expander: Smarter window resize

* Rather than enlarging the window on (potentially) every line, simply keep the largest delta and use it only once at the end of the listing.

Ref: r33073 and ticket #3797.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33075 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/expander/ExpanderWindow.cpp

@@ -365,9 +365,8 @@ ExpanderWindow::MessageReceived(BMessage *msg)
 					// expand the window if we need...
 					float delta = fListingText->StringWidth(string.String())
 						- fListingText->Frame().Width();
-					if (delta > 0) {
-						ResizeTo(Frame().Width() + delta,
-							Frame().Height());
+					if (delta > fLargestDelta) {
+						fLargestDelta = delta;
 					}
 					fListingText->Insert(string.String());
 				}
@@ -385,6 +384,9 @@ ExpanderWindow::MessageReceived(BMessage *msg)
 			} else if (fListingStarted){
 				fSourceChanged = false;
 				StopListing();
+				if (fLargestDelta > 0.0f)
+					ResizeBy(fLargestDelta, 0.0f);
+				fLargestDelta = 0.0f;
 			} else
 				fStatusView->SetText("");
 			break;
@@ -597,6 +599,8 @@ ExpanderWindow::StartListing()
 {
 	_UpdateWindowSize(true);
 
+	fLargestDelta = 0.0f;
+
 	if (fListingScroll->IsHidden())
 		fListingScroll->Show();
 

src/apps/expander/ExpanderWindow.h

@@ -77,6 +77,8 @@ class ExpanderWindow : public BWindow {
 		BMessage fSettings;
 		ExpanderPreferences *fPreferences;
 		ExpanderRules fRules;
+
+		float	fLargestDelta;
 };
 
 #endif /* EXPANDER_WINDOW_H */