// protected
void kpAbstractImageSelectionTool::changeImageSelectionTransparency (
const QString &name,
const kpImageSelectionTransparency &newTrans,
const kpImageSelectionTransparency &oldTrans)
{
#if DEBUG_KP_TOOL_SELECTION
qCDebug(kpLogTools) << "CALL(" << name << ")";
#endif
kpSetOverrideCursorSaver cursorSaver (Qt::WaitCursor);
if (hasBegunShape ())
endShapeInternal ();
kpAbstractImageSelection *imageSel = document ()->imageSelection ();
if (imageSel->hasContent () && newTrans.isTransparent ())
environ ()->flashColorSimilarityToolBarItem ();
imageSel->setTransparency (newTrans);
// We _must_ add the command even if kpAbstractImageSelection::setTransparency()
// above did not change the selection transparency mask at all.
// Consider the following case:
//
// 0. Ensure that selection transparency is opaque and any
// color other than red is the background color. Ensure that
// the color similarity setting is 0.
//
// 1. Select a solid red rectangle and pull it off.
//
// 2. Switch to transparent and set red as the background color.
// [the selection is now invisible as red is the background
// color, which is the same as the contents of the selection]
//
// 3. Invert Colors.
// [the selection is now cyan, red is still the background color]
//
// 4. Change the background color to green.
// [the selection transparency mask does not change so the
// selection is still cyan; green is the background color]
//
// 5. Undo
//
// If no transparency command were added for Step 4., the Undo
// in Step 5. would take us straight to the state after Step 2.,
// where we would expect the red selection to be invisible. However,
// as the background color was changed to green in Step 4. and was not
// undone, the red selection is not invisible when it should be -- Undo
// has moved us to an incorrect state.
//
// KDE3: Copy this comment into the KDE 3 branch.
commandHistory ()->addCommand (new kpToolImageSelectionTransparencyCommand (
name,
newTrans, oldTrans,
environ ()->commandEnvironment ()),
false/*no exec*/);
}
void showNothingToAutocropMessage (kpMainWindow *mainWindow, bool actOnSelection)
{
kpSetOverrideCursorSaver cursorSaver (Qt::arrowCursor);
if (actOnSelection)
{
KMessageBox::information (mainWindow,
i18n ("KolourPaint cannot remove the selection's internal border as it"
" could not be located."),
i18n ("Cannot Remove Internal Border"),
"NothingToAutoCrop");
}
else
{
KMessageBox::information (mainWindow,
i18n ("KolourPaint cannot automatically crop the image as its"
" border could not be located."),
i18n ("Cannot Autocrop"),
"NothingToAutoCrop");
}
}
bool kpToolAutoCrop (kpMainWindow *mainWindow)
{
#if DEBUG_KP_TOOL_AUTO_CROP
kdDebug () << "kpToolAutoCrop() CALLED!" << endl;
#endif
if (!mainWindow)
{
kdError () << "kpToolAutoCrop() passed NULL mainWindow" << endl;
return false;
}
kpDocument *doc = mainWindow->document ();
if (!doc)
{
kdError () << "kpToolAutoCrop() passed NULL document" << endl;
return false;
}
// OPT: if already pulled selection pixmap, no need to do it again here
QPixmap pixmap = doc->selection () ? doc->getSelectedPixmap () : *doc->pixmap ();
if (pixmap.isNull ())
{
kdError () << "kptoolAutoCrop() pased NULL pixmap" << endl;
return false;
}
kpViewManager *vm = mainWindow->viewManager ();
if (!vm)
{
kdError () << "kpToolAutoCrop() passed NULL vm" << endl;
return false;
}
int processedColorSimilarity = mainWindow->colorToolBar ()->processedColorSimilarity ();
kpToolAutoCropBorder leftBorder (&pixmap, processedColorSimilarity),
rightBorder (&pixmap, processedColorSimilarity),
topBorder (&pixmap, processedColorSimilarity),
botBorder (&pixmap, processedColorSimilarity);
kpSetOverrideCursorSaver cursorSaver (Qt::waitCursor);
// TODO: With Colour Similarity, a lot of weird (and wonderful) things can
// happen resulting in a huge number of code paths. Needs refactoring
// and regression testing.
//
// TODO: e.g. When the top fills entire rect but bot doesn't we could
// invalidate top and continue autocrop.
int numRegions = 0;
if (!leftBorder.calculate (true/*x*/, +1/*going right*/) ||
leftBorder.fillsEntirePixmap () ||
!rightBorder.calculate (true/*x*/, -1/*going left*/) ||
rightBorder.fillsEntirePixmap () ||
!topBorder.calculate (false/*y*/, +1/*going down*/) ||
topBorder.fillsEntirePixmap () ||
!botBorder.calculate (false/*y*/, -1/*going up*/) ||
botBorder.fillsEntirePixmap () ||
((numRegions = leftBorder.exists () +
rightBorder.exists () +
topBorder.exists () +
botBorder.exists ()) == 0))
{
#if DEBUG_KP_TOOL_AUTO_CROP
kdDebug () << "\tcan't find border; leftBorder.rect=" << leftBorder.rect ()
<< " rightBorder.rect=" << rightBorder.rect ()
<< " topBorder.rect=" << topBorder.rect ()
<< " botBorder.rect=" << botBorder.rect ()
<< endl;
#endif
::showNothingToAutocropMessage (mainWindow, (bool) doc->selection ());
return false;
}
#if DEBUG_KP_TOOL_AUTO_CROP
kdDebug () << "\tnumRegions=" << numRegions << endl;
kdDebug () << "\t\tleft=" << leftBorder.rect ()
<< " refCol=" << (leftBorder.exists () ? (int *) leftBorder.referenceColor ().toQRgb () : 0)
<< " avgCol=" << (leftBorder.exists () ? (int *) leftBorder.averageColor ().toQRgb () : 0)
<< endl;
kdDebug () << "\t\tright=" << rightBorder.rect ()
<< " refCol=" << (rightBorder.exists () ? (int *) rightBorder.referenceColor ().toQRgb () : 0)
<< " avgCol=" << (rightBorder.exists () ? (int *) rightBorder.averageColor ().toQRgb () : 0)
<< endl;
kdDebug () << "\t\ttop=" << topBorder.rect ()
<< " refCol=" << (topBorder.exists () ? (int *) topBorder.referenceColor ().toQRgb () : 0)
<< " avgCol=" << (topBorder.exists () ? (int *) topBorder.averageColor ().toQRgb () : 0)
<< endl;
kdDebug () << "\t\tbot=" << botBorder.rect ()
<< " refCol=" << (botBorder.exists () ? (int *) botBorder.referenceColor ().toQRgb () : 0)
<< " avgCol=" << (botBorder.exists () ? (int *) botBorder.averageColor ().toQRgb () : 0)
<< endl;
#endif
// In case e.g. the user pastes a solid, coloured-in rectangle,
// we favour killing the bottom and right regions
// (these regions probably contain the unwanted whitespace due
// to the doc being bigger than the pasted selection to start with).
//
// We also kill if they kiss or even overlap.
if (leftBorder.exists () && rightBorder.exists ())
{
const kpColor leftCol = leftBorder.averageColor ();
const kpColor rightCol = rightBorder.averageColor ();
if ((numRegions == 2 && !leftCol.isSimilarTo (rightCol, processedColorSimilarity)) ||
leftBorder.right () >= rightBorder.left () - 1) // kissing or overlapping
{
#if DEBUG_KP_TOOL_AUTO_CROP
kdDebug () << "\tignoring left border" << endl;
#endif
leftBorder.invalidate ();
}
}
if (topBorder.exists () && botBorder.exists ())
{
const kpColor topCol = topBorder.averageColor ();
const kpColor botCol = botBorder.averageColor ();
if ((numRegions == 2 && !topCol.isSimilarTo (botCol, processedColorSimilarity)) ||
topBorder.bottom () >= botBorder.top () - 1) // kissing or overlapping
{
#if DEBUG_KP_TOOL_AUTO_CROP
kdDebug () << "\tignoring top border" << endl;
#endif
topBorder.invalidate ();
}
}
mainWindow->addImageOrSelectionCommand (
new kpToolAutoCropCommand (
(bool) doc->selection (),
leftBorder, rightBorder,
topBorder, botBorder,
mainWindow));
return true;
}
