add option to create tiles using TMS naming convention (contributed by

Giovanni Allegri)

aboutdialog.py

@@ -71,7 +71,7 @@ def getAboutText(self):
     return self.tr("""<p>Generate tiles from QGIS project.</p>
 <p>Plugin generates raster tiles from QGIS project corresponding to <a href="http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames">Slippy Map</a>
 specification. Output tiles can be saved in directory or as zip archive.</p>
-<p><strong>Developers</strong>: Alexander Bruy (<a href="http://nextgis.org">NextGIS</a>), portions of code by Andrew Naplavkov.</p>
+<p><strong>Developers</strong>: Alexander Bruy (<a href="http://nextgis.org">NextGIS</a>), portions of code by Andrew Naplavkov and Giovanni Allegri.</p>
 <p><strong>Homepage</strong>: <a href="http://hub.qgis.org/projects/qtiles">http://hub.qgis.org/projects/qtiles</a></p>
 <p>Please report bugs at <a href="http://hub.qgis.org/projects/qtiles/issues">bugtracker</a></p>
 """)

qtilesdialog.py

@@ -96,6 +96,7 @@ def manageGui(self):
     self.spnTileHeight.setValue(settings.value("tileHeight", 256).toInt()[0])
 
     self.chkAntialiasing.setChecked(settings.value("enable_antialiasing", False).toBool())
+    self.chkTMSConvention.setChecked(settings.value("use_tms_filenames", False).toBool())
 
   def reject(self):
     QDialog.reject(self)
@@ -147,6 +148,7 @@ def accept(self):
     settings.setValue("tileHeight", self.spnTileHeight.value())
 
     settings.setValue("enable_antialiasing", self.chkAntialiasing.isChecked())
+    settings.setValue("use_tms_filenames", self.chkTMSConvention.isChecked())
 
     canvas = self.iface.mapCanvas()
 
@@ -175,7 +177,8 @@ def accept(self):
                                                 self.spnTileWidth.value(),
                                                 self.spnTileHeight.value(),
                                                 fileInfo,
-                                                self.chkAntialiasing.isChecked()
+                                                self.chkAntialiasing.isChecked(),
+                                                self.chkTMSConvention.isChecked()
                                                )
     self.workThread.rangeChanged.connect(self.setProgressRange)
     self.workThread.updateProgress.connect(self.updateProgress)

qtilesdialogbase.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>434</width>
-    <height>492</height>
+    <width>481</width>
+    <height>521</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -199,6 +199,13 @@
         </property>
        </widget>
       </item>
+      <item row="3" column="0" colspan="3">
+       <widget class="QCheckBox" name="chkTMSConvention">
+        <property name="text">
+         <string>Use TMS tiles convention (OSM by default)</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>

tile.py

@@ -30,15 +30,16 @@
 from qgis.core import *
 
 class Tile:
-  def __init__(self, x=0, y=0, z=0):
+  def __init__(self, x=0, y=0, z=0, tms=1):
     self.x = x
     self.y = y
     self.z = z
+    self.tms = tms
 
   def toPoint(self):
     n = math.pow(2, self.z)
     longitude = float(self.x) / n * 360.0 - 180.0
-    latitude = math.degrees(math.atan(math.sinh(math.pi * (1.0 - 2.0 * float(self.y) / n))))
+    latitude = self.tms * math.degrees(math.atan(math.sinh(math.pi * (1.0 - 2.0 * float(self.y) / n))))
     return QgsPoint(longitude, latitude)
 
   def toRectangle(self):

tilingthread.py

@@ -43,7 +43,7 @@ class TilingThread(QThread):
 
   rootDir = "Mapnik"
 
-  def __init__(self, layers, extent, minZoom, maxZoom, width, height, outputPath, antialiasing):
+  def __init__(self, layers, extent, minZoom, maxZoom, width, height, outputPath, antialiasing, tmsConvention):
     QThread.__init__(self, QThread.currentThread())
     self.mutex = QMutex()
     self.stopMe = 0
@@ -57,6 +57,7 @@ def __init__(self, layers, extent, minZoom, maxZoom, width, height, outputPath,
     self.width = width
 
     self.antialias = antialiasing
+    self.tmsConvetion = tmsConvention
 
     self.interrupted = False
     self.tiles = []
@@ -102,9 +103,16 @@ def run(self):
 
     self.rangeChanged.emit(self.tr("Searching tiles..."), 0)
 
-    self.__countTiles(Tile())
+    useTMS = 1
+    if self.tmsConvention:
+      useTMS = -1
+
+    self.countTiles(Tile(tms=useTMS))
 
     if self.interrupted:
+      del self.tiles[:]
+      self.tiles = None
+
       if self.zip is not None:
         self.zip.close()
         self.zip = None
@@ -122,7 +130,7 @@ def run(self):
       self.painter.setRenderHint(QPainter.Antialiasing)
 
     for t in self.tiles:
-      self.__render(t)
+      self.render(t)
 
       self.updateProgress.emit()
 
@@ -149,7 +157,7 @@ def stop(self):
 
     QThread.wait(self)
 
-  def __countTiles(self, tile):
+  def countTiles(self, tile):
     if self.interrupted or not self.extent.intersects(tile.toRectangle()):
       return
 
@@ -166,10 +174,10 @@ def __countTiles(self, tile):
             self.interrupted = True
             return
 
-          subTile = Tile(x, y, tile.z +1)
-          self.__countTiles(subTile)
+          subTile = Tile(x, y, tile.z +1, tile.tms)
+          self.countTiles(subTile)
 
-  def __render(self, tile):
+  def render(self, tile):
     self.renderer.setExtent(self.projector.transform(tile.toRectangle()))
     scale = self.scaleCalc.calculate(self.renderer.extent(), self.width)
     self.renderer.setScale(scale)