scPrintTwipsMsgs: Use print logical coordinates for draw objects

as a result LOK_CALLBACK_GRAPHIC(_VIEW)_SELECTION messages will now be
in print-twips.

For tile-rendering, it needs the pixel-aligned coordinates of each
object. The translation of print coordinates to pixel-aligned
coordinates can be done behind the scenes by the
ViewContact/ObjectContact/ViewObjectContact objects associated with the
draw object which uses the cached "grid-offset" for each object
(introduced in the patch "Refactor calc non-linear ViewToDevice
transform"). For doing this, a subclass of FmFormView with a specialized
"createViewSpecificObjectContact" method is used for tile-rendering. The
createViewSpecificObjectContact creates a "proxy" object-contact object
that delegates the grid-offsets queries to the actual ScDrawView
generated ObjectContact. This is needed because currently there is no
way to share the ObjectContact/ViewObjectContact instances between
different SdrPaintWindow's without making changes ~everywhere.

Change-Id: Ifdfb623c8d6dd81700ec4a5dfeeb6b2391a96154
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/98166
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Dennis Francis <dennis.francis@collabora.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/sc/source/ui/view/viewdata.cxx b/sc/source/ui/view/viewdata.cxx
index 887f4e632ce6..6632e51ee918 100644
--- a/sc/source/ui/view/viewdata.cxx
+++ b/sc/source/ui/view/viewdata.cxx
@@ -2434,6 +2434,21 @@ Point ScViewData::GetPrintTwipsPos(SCCOL nCol, SCROW nRow) const
     return Point(nPosX, nPosY);
 }
 
+Point ScViewData::GetPrintTwipsPosFromTileTwips(const Point& rTileTwipsPos) const
+{
+    const long nPixelX = static_cast<long>(rTileTwipsPos.X() * nPPTX);
+    const long nPixelY = static_cast<long>(rTileTwipsPos.Y() * nPPTY);
+    SCCOL nCol = 0;
+    SCROW nRow = 0;
+
+    // The following call (with bTestMerge = false) will not modify any members.
+    const_cast<ScViewData*>(this)->GetPosFromPixel(nPixelX, nPixelY, SC_SPLIT_TOPLEFT, nCol, nRow, false /* bTestMerge */);
+    const Point aPixCellPos = GetScrPos(nCol, nRow, SC_SPLIT_TOPLEFT, true /* bAllowNeg */);
+    const Point aTileTwipsCellPos(aPixCellPos.X() / nPPTX, aPixCellPos.Y() / nPPTY);
+    const Point aPrintTwipsCellPos = GetPrintTwipsPos(nCol, nRow);
+    return aPrintTwipsCellPos + (rTileTwipsPos - aTileTwipsCellPos);
+}
+
 OString ScViewData::describeCellCursorAt(SCCOL nX, SCROW nY, bool bPixelAligned) const
 {
     const bool bPosSizeInPixels = bPixelAligned;