6672f4a3ba
git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@9252 8e941d3f-bd1b-0410-a28a-d453659cc2b4
70 lines
2.2 KiB
Plaintext
70 lines
2.2 KiB
Plaintext
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LazMapviewer Marker Images
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The images in this folder are intended to be used as markers for
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points-of-interest in the maps displayed by the mapviewer.
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There are several motifs
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- dollar
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- camera
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- clinic
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- generic
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- pharmacy
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- restaurant
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- gas station
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- train
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- euro
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- shop
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- airport
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- hotel
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- parking lot
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- shopping center
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- university
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- bar
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- post office
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- court yard
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- hiking trail
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- theater
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in several colors
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- blue
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- green
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- orange
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- red
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and several sizes
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- 32x32
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- 48x48
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- 64x64
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- 96x96
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The file name appendix _150, _200, _300 indicates the magnification factor in
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percent of the base image (32x32 px).
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To display an image, add a layer to the MapView and a PointOfInterest to the
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layer. Enter the GPS location of the point (longitude, latitude) and a
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text to be displayed. Specify in the ImageIndex property the image to be shown;
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this is the index in an ImageList which should contain all images needed. The
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image list must be attached to the POIImages property of the MapView component.
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To prepare the image list, set its Width and height Properties to the size an
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image should have at standard monitor resolution of 96 ppi. Note that the
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default value in TImageList is 16 which results in very small images - better to
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set it to 32. In the ImageList editor add the additional resolutions that the
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application should support, normally 48 (for 144 ppi), 64 (for 196 ppi). If you
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additionally want to support intermediate resolutions, write a handler for the
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OnGetWidthForPPI event of the imagelist as described in
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https://wiki.lazarus.freepascal.org/TImageList. Add the images by means of
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the ImageList component editor. Finally set the Scaled property of the
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ImageList to true to enable scaling.
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License
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The images were kindly provided by Roland Hahn (https://www.rhsoft.de/).
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License: Creative Commons CC0 1.0 Universal
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https://creativecommons.org/publicdomain/zero/1.0/
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(freely available, no restrictions in usage)
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