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Readability.

This commit is contained in:
Jeff Young 2024-04-17 11:03:07 +01:00
parent c842de24b9
commit dee45a491e
1 changed files with 35 additions and 41 deletions
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76
eeschema/tools/ee_selection_tool.cpp
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@ -2237,45 +2237,40 @@ void EE_SELECTION_TOOL::ZoomFitCrossProbeBBox( const BOX2I& aBBox )
VECTOR2I bbSize = bbox.Inflate( bbox.GetWidth() * 0.2f ).GetSize();
VECTOR2D screenSize = getView()->GetViewport().GetSize();
// This code tries to come up with a zoom factor that doesn't simply zoom in
// to the cross probed symbol, but instead shows a reasonable amount of the
// circuit around it to provide context. This reduces or eliminates the need
// to manually change the zoom because it's too close.
// This code tries to come up with a zoom factor that doesn't simply zoom in to the cross
// probed symbol, but instead shows a reasonable amount of the circuit around it to provide
// context. This reduces the need to manually change the zoom because it's too close.
// Using the default text height as a constant to compare against, use the
// height of the bounding box of visible items for a footprint to figure out
// if this is a big symbol (like a processor) or a small symbol (like a resistor).
// This ratio is not useful by itself as a scaling factor. It must be "bent" to
// provide good scaling at varying symbol sizes. Bigger symbols need less
// scaling than small ones.
// Using the default text height as a constant to compare against, use the height of the
// bounding box of visible items for a footprint to figure out if this is a big symbol (like
// a processor) or a small symbol (like a resistor). This ratio is not useful by itself as a
// scaling factor. It must be "bent" to provide good scaling at varying symbol sizes. Bigger
// symbols need less scaling than small ones.
double currTextHeight = schIUScale.MilsToIU( DEFAULT_TEXT_SIZE );
double compRatio = bbSize.y / currTextHeight; // Ratio of symbol to text height
double compRatioBent = 1.0;
// LUT to scale zoom ratio to provide reasonable schematic context. Must work
// with symbols of varying sizes (e.g. 0402 package and 200 pin BGA).
// "first" is used as the input and "second" as the output
//
// "first" = compRatio (symbol height / default text height)
// "second" = Amount to scale ratio by
std::vector<std::pair<double, double>> lut{ { 1.25, 16 }, // 32
{ 2.5, 12 }, //24
{ 5, 8 }, // 16
{ 6, 6 }, //
{ 10, 4 }, //8
{ 20, 2 }, //4
{ 40, 1.5 }, // 2
{ 100, 1 } };
// LUT to scale zoom ratio to provide reasonable schematic context. Must work with symbols
// of varying sizes (e.g. 0402 package and 200 pin BGA).
// Each entry represents a compRatio (symbol height / default text height) and an amount to
// scale by.
std::vector<std::pair<double, double>> lut{ { 1.25, 16 },
{ 2.5, 12 },
{ 5, 8 },
{ 6, 6 },
{ 10, 4 },
{ 20, 2 },
{ 40, 1.5 },
{ 100, 1 } };
std::vector<std::pair<double, double>>::iterator it;
// Large symbol default is last LUT entry (1:1).
compRatioBent = lut.back().second;
// Use LUT to do linear interpolation of "compRatio" within "first", then
// use that result to linearly interpolate "second" which gives the scaling
// factor needed.
// Use LUT to do linear interpolation of "compRatio" within "first", then use that result to
// linearly interpolate "second" which gives the scaling factor needed.
if( compRatio >= lut.front().first )
{
for( it = lut.begin(); it < lut.end() - 1; it++ )
@ -2295,24 +2290,23 @@ void EE_SELECTION_TOOL::ZoomFitCrossProbeBBox( const BOX2I& aBBox )
compRatioBent = lut.front().second; // Small symbol default is first entry
}
// This is similar to the original KiCad code that scaled the zoom to make sure
// symbols were visible on screen. It's simply a ratio of screen size to
// symbol size, and its job is to zoom in to make the component fullscreen.
// Earlier in the code the symbol BBox is given a 20% margin to add some
// breathing room. We compare the height of this enlarged symbol bbox to the
// default text height. If a symbol will end up with the sides clipped, we
// adjust later to make sure it fits on screen.
// This is similar to the original KiCad code that scaled the zoom to make sure symbols were
// visible on screen. It's simply a ratio of screen size to symbol size, and its job is to
// zoom in to make the component fullscreen. Earlier in the code the symbol BBox is given a
// 20% margin to add some breathing room. We compare the height of this enlarged symbol bbox
// to the default text height. If a symbol will end up with the sides clipped, we adjust
// later to make sure it fits on screen.
screenSize.x = std::max( 10.0, screenSize.x );
screenSize.y = std::max( 10.0, screenSize.y );
double ratio = std::max( -1.0, fabs( bbSize.y / screenSize.y ) );
// Original KiCad code for how much to scale the zoom
double kicadRatio =
std::max( fabs( bbSize.x / screenSize.x ), fabs( bbSize.y / screenSize.y ) );
double kicadRatio = std::max( fabs( bbSize.x / screenSize.x ),
fabs( bbSize.y / screenSize.y ) );
// If the width of the part we're probing is bigger than what the screen width
// will be after the zoom, then punt and use the KiCad zoom algorithm since it
// guarantees the part's width will be encompassed within the screen.
// If the width of the part we're probing is bigger than what the screen width will be after
// the zoom, then punt and use the KiCad zoom algorithm since it guarantees the part's width
// will be encompassed within the screen.
if( bbSize.x > screenSize.x * ratio * compRatioBent )
{
// Use standard KiCad zoom for parts too wide to fit on screen/
@ -2322,8 +2316,8 @@ void EE_SELECTION_TOOL::ZoomFitCrossProbeBBox( const BOX2I& aBBox )
"Part TOO WIDE for screen. Using normal KiCad zoom ratio: %1.5f", ratio );
}
// Now that "compRatioBent" holds our final scaling factor we apply it to the
// original fullscreen zoom ratio to arrive at the final ratio itself.
// Now that "compRatioBent" holds our final scaling factor we apply it to the original
// fullscreen zoom ratio to arrive at the final ratio itself.
ratio *= compRatioBent;
bool alwaysZoom = false; // DEBUG - allows us to minimize zooming or not