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Adjusted min/max/default values of parameters, moved some code into 'prepareAlgorithm'

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This commit is contained in:
Marcel Dancak 2019-04-25 12:15:52 +02:00
parent 83f35617f3
commit e0d6694a12
1 changed files with 25 additions and 13 deletions
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38
python/plugins/processing/algs/qgis/TilesXYZ.py
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@ -42,7 +42,6 @@ from qgis.core import (QgsProcessingException,
QgsProcessingOutputFile,
QgsProcessingParameterFileDestination,
QgsProcessingParameterFolderDestination,
QgsProject,
QgsGeometry,
QgsRectangle,
QgsMapSettings,
@ -233,18 +232,25 @@ class TilesXYZ(QgisAlgorithm):
return 'rastertools'
def initAlgorithm(self, config=None):
self.addParameter(QgsProcessingParameterString(self.NAME, self.tr('Name'), defaultValue='Test'))
self.addParameter(QgsProcessingParameterFolderDestination(self.OUTPUT_DIRECTORY, self.tr('Output directory')))
self.addParameter(QgsProcessingParameterString(self.NAME,
self.tr('Name'),
defaultValue='Tiles'))
self.addParameter(QgsProcessingParameterExtent(self.EXTENT, self.tr('Extent')))
self.addParameter(QgsProcessingParameterNumber(self.ZOOM_MIN,
self.tr('Minimum zoom'),
minValue=0,
maxValue=25,
defaultValue=12))
self.addParameter(QgsProcessingParameterNumber(self.ZOOM_MAX,
self.tr('Maximum zoom'),
minValue=0,
maxValue=25,
defaultValue=12))
self.addParameter(QgsProcessingParameterNumber(self.DPI, self.tr('DPI'), defaultValue=96))
self.addParameter(QgsProcessingParameterNumber(self.DPI,
self.tr('DPI'),
minValue=48,
maxValue=600,
defaultValue=96))
self.formats = ['PNG', 'JPG']
self.addParameter(QgsProcessingParameterEnum(self.TILE_FORMAT,
self.tr('Tile format'),
@ -255,6 +261,8 @@ class TilesXYZ(QgisAlgorithm):
self.tr('Output format'),
self.outputs,
defaultValue=0))
self.addParameter(QgsProcessingParameterFolderDestination(self.OUTPUT_DIRECTORY,
self.tr('Output directory')))
def name(self):
return 'tilesxyz'
@ -262,6 +270,12 @@ class TilesXYZ(QgisAlgorithm):
def displayName(self):
return self.tr('Generate XYZ tiles')
def prepareAlgorithm(self, parameters, context, feedback):
project = context.project()
visible_layers = [item.layer() for item in project.layerTreeRoot().findLayers() if item.isVisible()]
self.layers = [l for l in project.layerTreeRoot().layerOrder() if l in visible_layers]
return True
def processAlgorithm(self, parameters, context, feedback):
feedback.setProgress(1)
@ -276,20 +290,17 @@ class TilesXYZ(QgisAlgorithm):
tile_width = 256
tile_height = 256
project = QgsProject.instance()
visible_layers = [item.layer() for item in project.layerTreeRoot().findLayers() if item.isVisible()]
layers = [l for l in project.layerTreeRoot().layerOrder() if l in visible_layers]
wgs_crs = QgsCoordinateReferenceSystem('EPSG:4326')
dest_crs = QgsCoordinateReferenceSystem('EPSG:3857')
project = context.project()
src_to_wgs = QgsCoordinateTransform(project.crs(), wgs_crs, context.transformContext())
wgs_to_dest = QgsCoordinateTransform(wgs_crs, dest_crs, context.transformContext())
settings = QgsMapSettings()
settings.setOutputImageFormat(QImage.Format_ARGB32_Premultiplied)
settings.setDestinationCrs(dest_crs)
settings.setLayers(layers)
settings.setLayers(self.layers)
settings.setOutputDpi(dpi)
wgs_extent = src_to_wgs.transformBoundingBox(extent)
@ -351,12 +362,13 @@ class TilesXYZ(QgisAlgorithm):
# os.makedirs(metatile_dir, exist_ok=True)
# image.save(os.path.join(metatile_dir, 'metatile_%s.png' % i))
progress += 1
feedback.setProgress(100 * (progress / metatiles_count))
for r, c, tile in metatile.tiles:
tile_img = image.copy(tile_width * r, tile_height * c, tile_width, tile_height)
writer.writeTile(tile, tile_img)
progress += 1
feedback.setProgress(100 * (progress / metatiles_count))
output = writer.close()
return {'OUTPUT': output}