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Fix this up so I can drag things around properly, and have

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them get to their destination without getting misplaced or a 
crash.

In short, keeping iterators to a changing QList is a Bad Idea(tm),
so I did the simple thing can used indices.

svn path=/trunk/KDE/kdebase/workspace/; revision=715952
This commit is contained in:
Maks Orlovich 2007-09-23 15:23:10 +00:00
parent a717c047a3
commit 0d2e2cdfcc
2 changed files with 32 additions and 30 deletions
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58
kcmkwin/kwindecoration/buttons.cpp
View file

@ -382,21 +382,21 @@ void ButtonDropSite::dropEvent( QDropEvent* e )
// collect information where to insert the dropped button
ButtonList *buttonList = 0;
ButtonList::iterator buttonPosition;
int buttonPosition;
if (leftDropArea().contains(p) ) {
buttonList = &buttonsLeft;
buttonPosition = buttonsLeft.end();
buttonPosition = buttonsLeft.size();
} else if (rightDropArea().contains(p) ) {
buttonList = &buttonsRight;
buttonPosition = buttonsRight.begin();
buttonPosition = 0;
} else {
ButtonDropSiteItem *aboveItem = buttonAt(p);
if (!aboveItem)
return; // invalid drop. hasn't occurred _over_ a button (or left/right dropArea), return...
ButtonList::iterator it;
if (!getItemIterator(aboveItem, buttonList, it) ) {
int pos;
if (!getItemPos(aboveItem, buttonList, pos) ) {
// didn't find the aboveItem. unlikely to happen since buttonAt() already seems to have found
// something valid. anyway...
return;
@ -410,12 +410,9 @@ void ButtonDropSite::dropEvent( QDropEvent* e )
if (p.x() < aboveItemRect.left()+aboveItemRect.width()/2 ) {
// insert before the item
buttonPosition = it;
buttonPosition = pos;
} else {
if (it != buttonList->end() )
buttonPosition = ++it;
else
buttonPosition = it; // already at the end(), can't increment the iterator!
buttonPosition = pos + 1;
}
}
@ -424,13 +421,18 @@ void ButtonDropSite::dropEvent( QDropEvent* e )
ButtonDropSiteItem *buttonItem = 0;
if (e->source() == this && m_selected) {
ButtonList *oldList = 0;
ButtonList::iterator oldPos;
if (getItemIterator(m_selected, oldList, oldPos) ) {
if (oldPos == buttonPosition)
int oldPos;
if (getItemPos(m_selected, oldList, oldPos) ) {
if (oldPos == buttonPosition && oldList == buttonList)
return; // button didn't change its position during the drag...
oldList->erase(oldPos);
oldList->removeAt(oldPos);
buttonItem = m_selected;
// If we're inserting to the right of oldPos, in the same list,
// better adjust the index..
if (buttonList == oldList && buttonPosition > oldPos)
--buttonPosition;
} else {
return; // m_selected not found, return...
}
@ -452,26 +454,26 @@ void ButtonDropSite::dropEvent( QDropEvent* e )
update();
}
bool ButtonDropSite::getItemIterator(ButtonDropSiteItem *item, ButtonList* &list, ButtonList::iterator &iterator)
bool ButtonDropSite::getItemPos(ButtonDropSiteItem *item, ButtonList* &list, int &pos)
{
if (!item)
return false;
int ind = buttonsLeft.indexOf(item); // try the left list first...
if (ind < 0 ) {
ind = buttonsRight.indexOf(item); // try the right list...
if ( ind < 0 ) {
return false; // item hasn't been found in one of the list, return...
} else {
list = &buttonsRight;
iterator = buttonsRight.begin()+ind;
}
} else {
pos = buttonsLeft.indexOf(item); // try the left list first...
if (pos >= 0) {
list = &buttonsLeft;
buttonsLeft.begin()+ind;
return true;
}
return true;
pos = buttonsRight.indexOf(item); // try the right list...
if (pos >= 0) {
list = &buttonsRight;
return true;
}
list = 0;
pos = -1;
return false;
}
QRect ButtonDropSite::leftDropArea()
@ -600,7 +602,7 @@ void ButtonDropSite::drawButtonList(QPainter *p, const ButtonList& btns, int off
}
}
void ButtonDropSite::paintEvent( QPaintEvent* pe )
void ButtonDropSite::paintEvent( QPaintEvent* /*pe*/ )
{
QPainter p( this );
int leftoffset = calcButtonListWidth( buttonsLeft );

4
kcmkwin/kwindecoration/buttons.h
View file

@ -188,9 +188,9 @@ class ButtonDropSite: public QFrame
private:
/**
* Try to find the item. If found, set its list and iterator and return true, else return false
* Try to find the item. If found, set its list and index and return true, else return false
*/
bool getItemIterator(ButtonDropSiteItem *item, ButtonList* &list, ButtonList::iterator &iterator);
bool getItemPos(ButtonDropSiteItem *item, ButtonList* &list, int &pos);
void cleanDropVisualizer();
QRect m_oldDropVisualizer;