diff options
Diffstat (limited to 'chartscreen.py')
| -rw-r--r-- | chartscreen.py | 39 |
1 files changed, 26 insertions, 13 deletions
diff --git a/chartscreen.py b/chartscreen.py index 02d67bb..d13ed12 100644 --- a/chartscreen.py +++ b/chartscreen.py @@ -18,6 +18,7 @@ import math import locale import cairo +import logging # Import activity module import colors @@ -76,13 +77,13 @@ class ChartScreen(Gtk.VBox): def build(self): if self._graph_mode == self.CHART_CREDIT: - title = _('Credit Categories') + self.title = _('Credit Categories') elif self._graph_mode == self.CHART_DEBIT: - title = _('Debit Categories') + self.title = _('Debit Categories') self._title_label.set_markup( '<span size="x-large" foreground="white"><b>%s</b></span>' % - title) + self.title) # Build the category totals. self.category_total = {} @@ -102,18 +103,30 @@ class ChartScreen(Gtk.VBox): # self.category_total[b])) self.area.queue_draw() + def generate_image(self, image_file, width, height): + image_surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, width, height) + + context = cairo.Context(image_surface) + self.create_chart(context, width, height) + image_surface.flush() + image_surface.write_to_png(image_file) + def chart_draw_cb(self, widget, context): # Draw pie chart. bounds = widget.get_allocation() - context.rectangle(0, 0, bounds.width, bounds.height) + self.create_chart(context, bounds.width, bounds.height) + + def create_chart(self, context, image_width, image_height): + scale = image_width / 1600. + context.rectangle(0, 0, image_width, image_height) + logging.debug('canvas size %s x %s - scale %s', image_width, + image_height, scale) context.set_source_rgb(1, 1, 1) context.fill() - # draw the labels - - margin_left = style.GRID_CELL_SIZE / 2 - margin_top = style.GRID_CELL_SIZE / 2 - padding = 20 + margin_left = (style.GRID_CELL_SIZE / 2) * scale + margin_top = (style.GRID_CELL_SIZE / 2) * scale + padding = 20 * scale # measure the descriptions max_width_desc = 0 @@ -121,7 +134,7 @@ class ChartScreen(Gtk.VBox): max_height = 0 context.select_font_face('Sans', cairo.FONT_SLANT_NORMAL, cairo.FONT_WEIGHT_NORMAL) - context.set_font_size(20) + context.set_font_size(20 * scale) for c in self.sorted_categories: description = c @@ -183,9 +196,9 @@ class ChartScreen(Gtk.VBox): context.restore() # draw the pie - x = (bounds.width - rectangles_width) / 2 + rectangles_width - y = bounds.height / 2 - r = min(bounds.width, bounds.height) / 2 - 10 + x = (image_width - rectangles_width) / 2 + rectangles_width + y = image_height / 2 + r = min(image_width, image_height) / 2 - 10 total = 0 for c in self.sorted_categories: |