[PATCH 1/2] Simpler way to draw commit graph
- From
- Josef Weidendorfer <josef.weidendorfer@gmx.de>
- Date
- Oct 19, 2006, 14:13 UTC
- Message-ID
- <200610191613.31119.Josef.Weidendorfer@gmx.de>
For drawing the commit graph, previously every item got a pixmap created and set with item->setPixmap(), which is drawn by the standard implementation of QListView::paintCell().
Instead, this commit implements drawing of the graph directly in our own ListView::paintCell(). This gets rid of a lot of complex code to reset the pixmap of invisible items which was needed in large repositories before to not allocate huge amounts of memory.
As we directly draw only the visible cells, it has no influence on performance (especially, as we got rid of pixmaps of invisible items before, and most often had to draw the graph anyway).
Signed-off-by: Josef Weidendorfer <Josef.Weidendorfer@gmx.de> ---
Hi Marco,
currently, when drawing branch/tag labels in the commit graph, QGit shows in the graph small white spaces. This is because these lines are a little higher than the rest, and the pregenerated graph pixmaps only have a given height.
In order to solve this, I looked at the code, and do not understand one thing: Why are you creating pixmaps for the graph, and do draw directly in paintCell() ?
This patch does exactly this, and the next one does cleanup of code which is not used afterwards.
If you like, I can comeup with a patch to directly draw the lines which would get rid of the original problem.
Josef
src/listview.cpp | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/listview.h | 1 + 2 files changed, 58 insertions(+), 0 deletions(-)
diff --git a/src/listview.cpp b/src/listview.cpp index cef1c2a..418836b 100644 --- a/src/listview.cpp +++ b/src/listview.cpp @@ -448,6 +448,56 @@ void ListViewItem::setDiffTarget(bool b) repaint(); } +void ListViewItem::paintGraph(const Rev& c, QPainter *p, const QColorGroup &cg, int width) +{ + // Copied from QListViewItem::paintCell + QListView *lv = listView(); + if ( !lv ) return; + + const BackgroundMode bgmode = lv->viewport()->backgroundMode(); + const QColorGroup::ColorRole crole + = QPalette::backgroundRoleFromMode( bgmode ); + + if ( isSelected() && lv->allColumnsShowFocus() ) + p->fillRect( 0, 0, width, height(), cg.brush( QColorGroup::Highlight ) ); + else + p->fillRect( 0, 0, width, height(), cg.brush( crole ) ); + + // Copy from getGraph(), modified to directly draw into cell + const QValueVector<int>& lanes(c.lanes); + uint laneNum = lanes.count(); + int pw = pms[0]->width(); + int mergeLane = -1; + for (uint i = 0; i < laneNum; i++) + if (isMerge(lanes[i])) { + mergeLane = i; + break; + } + + for (uint i = 0; i < laneNum; i++) { + + int ln = lanes[i], idx; + if (ln == EMPTY) + continue; + + if (ln == CROSS) + idx = COLORS_NUM * (NOT_ACTIVE - 1); + else + idx = COLORS_NUM * (ln - 1); + + int col = ( isHead(ln) || isTail(ln) || isJoin(ln) + || ln == CROSS_EMPTY) ? mergeLane : i; + + idx += col % COLORS_NUM; + p->drawPixmap(i * pw, 0, *pms[idx]); + if (ln == CROSS) { + idx = COLORS_NUM * (CROSS - 1) + mergeLane % COLORS_NUM; + p->drawPixmap(i * pw, 0, *pms[idx]); + } + } +} + + void ListViewItem::paintCell(QPainter* p, const QColorGroup& cg, int column, int width, int alignment) { QColorGroup _cg(cg); @@ -457,12 +507,19 @@ void ListViewItem::paintCell(QPainter* p if (!populated) setupData(c); +#if 1 + if (column == GRAPH_COL) { + paintGraph(c, p, _cg, width); + return; + } +#else // pixmap graph, separated from setupData to allow deleting if (!pixmap(GRAPH_COL)) { QPixmap* pm = getGraph(c); setPixmap(GRAPH_COL, *pm); delete pm; } +#endif // adjust for annotation id column presence int mycolumn = (fh) ? column : column + 1; diff --git a/src/listview.h b/src/listview.h index 672ed7d..25de935 100644 --- a/src/listview.h +++ b/src/listview.h @@ -33,6 +33,7 @@ public: private: void setupData(const Rev& c); + void paintGraph(const Rev& c, QPainter *p, const QColorGroup &cg, int width); QPixmap* getGraph(const Rev& c); void addTextPixmap(SCRef text, const QColor& color, bool bold = false); QPixmap* doAddTextPixmap(SCRef text, const QColor& color, int col, bool bold);
-- 1.4.3.rc2.gf8ffb