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25.4 mm to the inch, not 25.1

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33866 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Julian Smart
2005-04-24 11:44:51 +00:00
parent 2d29bf54f1
commit 70949ed554
1 changed files with 3 additions and 3 deletions
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6
samples/printing/printing.cpp
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@@ -487,14 +487,14 @@ void MyPrintout::DrawPageTwo(wxDC *dc)
// Calculate conversion factor for converting millimetres into // Calculate conversion factor for converting millimetres into
// logical units. // logical units.
// There are approx. 25.1 mm to the inch. There are ppi // There are approx. 25.4 mm to the inch. There are ppi
// device units to the inch. Therefore 1 mm corresponds to // device units to the inch. Therefore 1 mm corresponds to
// ppi/25.1 device units. We also divide by the // ppi/25.4 device units. We also divide by the
// screen-to-printer scaling factor, because we need to // screen-to-printer scaling factor, because we need to
// unscale to pass logical units to DrawLine. // unscale to pass logical units to DrawLine.
// Draw 50 mm by 50 mm L shape // Draw 50 mm by 50 mm L shape
float logUnitsFactor = (float)(ppiPrinterX/(scale*25.1)); float logUnitsFactor = (float)(ppiPrinterX/(scale*25.4));
float logUnits = (float)(50*logUnitsFactor); float logUnits = (float)(50*logUnitsFactor);
dc->SetPen(* wxBLACK_PEN); dc->SetPen(* wxBLACK_PEN);
dc->DrawLine(50, 250, (long)(50.0 + logUnits), 250); dc->DrawLine(50, 250, (long)(50.0 + logUnits), 250);