poly_strip_dialog.py

# -*- coding: utf-8 -*-
"""
/***************************************************************************
 PolyStripDialog
                                 A QGIS plugin
 Polygons along lines 
                             -------------------
        begin                : 2017-07-29
        git sha              : $Format:%H$
        copyright            : (C) 2017 by Werner Macho
        email                : werner.macho@gmail.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
"""

import os

from qgis.PyQt import (
    uic
)
from qgis.PyQt.QtWidgets import (
    QDialog
)
from qgis.gui import (
    QgsProjectionSelectionTreeWidget
)
from .poly_strip_alg import get_all_pages


FORM_CLASS, _ = uic.loadUiType(os.path.join(
    os.path.dirname(__file__), 'poly_strip_dialog_base.ui'))


class PolyStripDialog(QDialog, FORM_CLASS):
    def __init__(self, parent=None):
        """Constructor."""
        super(PolyStripDialog, self).__init__(parent)
        self.setupUi(self)

    def polystrip(self, layer):
        if self.crsBoxSelect.isChecked():
            srid = PolyStripDialog().crsselectauto(layer)
        else:
            srid = PolyStripDialog().crsselect
        width = self.widthSpinBox.value()
        height = self.heightSpinBox.value()
        coverage = self.coverSpinBox.value()
        covstart = self.coverSpinBoxStart.value()
        get_all_pages(layer, width, height, srid, coverage, covstart)

    def labelwriter(self, unitstr):
        unit = unitstr
        self.label_unit.setText(unit)

    @staticmethod
    def crsselect():
        proj_selector = QgsProjectionSelectionTreeWidget()
        proj_selector.exec_()
        srid = proj_selector.crs()
        return srid

    @staticmethod
    def crsselectauto(layer):
        srid = layer.crs().authid()
        return srid