fanchart: refactor of text drawing, fix bug on transparent box text not showing
svn: r20387
This commit is contained in:
Benny Malengier
parent
7348f5ee79
commit
ed6f1c5672
@ -145,6 +145,12 @@ class FanChartBaseWidget(Gtk.DrawingArea):
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def __init__(self, dbstate, callback_popup=None):
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def __init__(self, dbstate, callback_popup=None):
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GObject.GObject.__init__(self)
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GObject.GObject.__init__(self)
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st_cont = self.get_style_context()
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col = st_cont.lookup_color('text_color')
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if col[0]:
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self.textcolor = (col[1].red, col[1].green, col[1].blue)
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else:
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self.textcolor = (0, 0, 0)
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self.dbstate = dbstate
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self.dbstate = dbstate
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self.translating = False
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self.translating = False
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self.goto = None
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self.goto = None
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@ -440,6 +446,32 @@ class FanChartBaseWidget(Gtk.DrawingArea):
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return color[0], color[1], color[2], alpha
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return color[0], color[1], color[2], alpha
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def fontcolor(self, r, g, b, a):
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"""
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return the font color based on the r, g, b of the background
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"""
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if a == 0:
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return self.textcolor
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try:
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return self.cache_fontcolor[(r, g, b)]
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except KeyError:
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hls = colorsys.rgb_to_hls(r/255, g/255, b/255)
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# we use the lightness value to determine white or black font
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if hls[1] > 0.4:
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self.cache_fontcolor[(r, g, b)] = (0, 0, 0)
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else:
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self.cache_fontcolor[(r, g, b)] = (1, 1, 1)
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return self.cache_fontcolor[(r, g, b)]
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def fontbold(self, a):
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"""
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The font should be bold if no transparency and font is set.
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In that case, True is returned
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"""
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if a >= 1. and self.filter:
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return True
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return False
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def draw_innerring(self, cr, person, userdata, start, inc):
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def draw_innerring(self, cr, person, userdata, start, inc):
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"""
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"""
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Procedure to draw a person in the inner ring position
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Procedure to draw a person in the inner ring position
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@ -475,6 +507,163 @@ class FanChartBaseWidget(Gtk.DrawingArea):
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cr.set_source_rgba(r/255., g/255., b/255., a)
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cr.set_source_rgba(r/255., g/255., b/255., a)
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cr.fill()
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cr.fill()
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def draw_text(self, cr, text, radius, start, stop,
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height=PIXELS_PER_GENERATION, radial=False,
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fontcolor=(0, 0, 0), bold=False):
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"""
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Display text at a particular radius, between start and stop
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degrees.
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"""
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cr.save()
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font = Pango.FontDescription(self.fontdescr)
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fontsize = self.fontsize
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font.set_size(fontsize * Pango.SCALE)
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if bold:
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font.set_weight(Pango.Weight.BOLD)
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cr.set_source_rgb(fontcolor[0], fontcolor[1], fontcolor[2])
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if radial and self.radialtext:
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cr.save()
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layout = self.create_pango_layout(text)
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 5 # 5 pixel padding
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h = h / Pango.SCALE + 4 # 4 pixel padding
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#first we check if height is ok
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degneedheight = h / radius * (180 / math.pi)
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degavailheight = stop-start
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degoffsetheight = 0
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if degneedheight > degavailheight:
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#reduce height
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fontsize = degavailheight / degneedheight * fontsize / 2
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font.set_size(fontsize * Pango.SCALE)
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layout = self.create_pango_layout(text)
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 5 # 5 pixel padding
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h = h / Pango.SCALE + 4 # 4 pixel padding
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#first we check if height is ok
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degneedheight = h / radius * (180 / math.pi)
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degavailheight = stop-start
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if degneedheight > degavailheight:
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#we could not fix it, no text
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text = ""
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if text:
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#spread rest
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degoffsetheight = (degavailheight - degneedheight) / 2
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txlen = len(text)
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if w > height:
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txlen = int(w/height * txlen)
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cont = True
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while cont:
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layout = self.create_pango_layout(text[:txlen])
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 5 # 5 pixel padding
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h = h / Pango.SCALE + 4 # 4 pixel padding
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if w > height:
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if txlen <= 1:
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cont = False
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txlen = 0
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else:
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txlen -= 1
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else:
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cont = False
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# offset for cairo-font system is 90
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rotval = self.rotate_value % 360 - 90
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if (start + rotval) % 360 > 179:
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pos = start + degoffsetheight + 90 - 90
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else:
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pos = stop - degoffsetheight + 180
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cr.rotate(pos * math.pi / 180)
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layout.context_changed()
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if (start + rotval) % 360 > 179:
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cr.move_to(radius+2, 0)
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else:
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cr.move_to(-radius-height+6, 0)
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PangoCairo.show_layout(cr, layout)
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cr.restore()
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else:
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# center text:
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# 1. determine degrees of the text we can draw
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degpadding = 5 / radius * (180 / math.pi) # degrees for 5 pixel padding
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degneed = degpadding
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maxlen = len(text)
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hoffset = 0
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for i in range(len(text)):
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layout = self.create_pango_layout(text[i])
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 2 # 2 pixel padding after letter
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h = h / Pango.SCALE + 2 # 2 pixel padding
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if h/2 > hoffset:
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hoffset = h/2
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degneed += w / radius * (180 / math.pi)
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if degneed > stop - start:
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#outside of the box
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maxlen = i
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break
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# 2. determine degrees over we can distribute before and after
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if degneed > stop - start:
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degover = 0
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else:
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degover = stop - start - degneed - degpadding
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# 3. now draw this text, letter per letter
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text = text[:maxlen]
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# offset for cairo-font system is 90, padding used is 5:
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pos = start + 90 + degpadding + degover / 2
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# Create a PangoLayout, set the font and text
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# Draw the layout N_WORDS times in a circle
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for i in range(len(text)):
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layout = self.create_pango_layout(text[i])
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 2 # 4 pixel padding after word
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h = h / Pango.SCALE + 2 # 4 pixel padding
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degneed = w / radius * (180 / math.pi)
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if pos+degneed > stop + 90:
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#failsafe, outside of the box, redo
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break
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cr.save()
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cr.rotate(pos * math.pi / 180)
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pos = pos + degneed
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# Inform Pango to re-layout the text with the new transformation
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layout.context_changed()
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#width, height = layout.get_size()
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#r.move_to(- (width / Pango.SCALE) / 2.0, - radius)
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cr.move_to(0, - radius - hoffset)
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PangoCairo.show_layout(cr, layout)
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cr.restore()
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cr.restore()
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def draw_gradient(self, cr, widget, halfdist):
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gradwidth = 10
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gradheight = 10
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starth = 15
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startw = 5
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alloc = self.get_allocation()
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x, y, w, h = alloc.x, alloc.y, alloc.width, alloc.height
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cr.save()
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cr.translate(-self.center_x, -self.center_y)
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font = Pango.FontDescription(self.fontdescr)
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fontsize = self.fontsize
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font.set_size(fontsize * Pango.SCALE)
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for color, text in zip(self.gradcol, self.gradval):
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cr.move_to(startw, starth)
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cr.rectangle(startw, starth, gradwidth, gradheight)
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cr.set_source_rgb(color[0], color[1], color[2])
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cr.fill()
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layout = self.create_pango_layout(text)
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layout.set_font_description(font)
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cr.move_to(startw+gradwidth+4, starth)
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cr.set_source_rgb(0, 0, 0) #black
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PangoCairo.show_layout(cr, layout)
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starth = starth+gradheight
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cr.restore()
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def person_under_cursor(self, curx, cury):
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def person_under_cursor(self, curx, cury):
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"""
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"""
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Determine the generation and the position in the generation at
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Determine the generation and the position in the generation at
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@ -512,10 +701,8 @@ class FanChartBaseWidget(Gtk.DrawingArea):
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# FIXME: add a way of expanding
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# FIXME: add a way of expanding
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# find what person is in this position:
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# find what person is in this position:
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selected = None
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selected = None
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if (0 < generation < self.generations):
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if (0 <= generation < self.generations):
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selected = self.personpos_at_angle(generation, pos, btype)
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selected = self.personpos_at_angle(generation, pos, btype)
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elif generation == 0:
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selected = 0
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elif generation == -2:
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elif generation == -2:
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for p in range(len(self.angle[generation])):
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for p in range(len(self.angle[generation])):
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start, stop, state = self.angle[generation][p]
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start, stop, state = self.angle[generation][p]
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@ -968,8 +1155,10 @@ class FanChartWidget(FanChartBaseWidget):
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cr.fill()
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cr.fill()
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cr.save()
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cr.save()
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name = name_displayer.display(person)
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name = name_displayer.display(person)
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self.draw_text(cr, name, CENTER - 10, 95, 455, False,
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self.draw_text(cr, name, CENTER -
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self.fontcolor(r, g, b), self.fontbold(a))
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(CENTER - (CHILDRING_WIDTH + TRANSLATE_PX))/2, 95, 455,
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10, False,
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self.fontcolor(r, g, b, a), self.fontbold(a))
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cr.restore()
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cr.restore()
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#draw center to move chart
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#draw center to move chart
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cr.set_source_rgb(0, 0, 0) # black
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cr.set_source_rgb(0, 0, 0) # black
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@ -1052,8 +1241,9 @@ class FanChartWidget(FanChartBaseWidget):
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# more space to print it radial
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# more space to print it radial
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radial = True
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radial = True
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radstart = radius - PIXELS_PER_GENERATION + 4
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radstart = radius - PIXELS_PER_GENERATION + 4
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self.draw_text(cr, name, radstart, start, stop, radial,
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self.draw_text(cr, name, radstart, start, stop,
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self.fontcolor(r, g, b), self.fontbold(a))
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PIXELS_PER_GENERATION, radial,
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self.fontcolor(r, g, b, a), self.fontbold(a))
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cr.restore()
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cr.restore()
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def draw_childring(self, cr):
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def draw_childring(self, cr):
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@ -1075,183 +1265,6 @@ class FanChartWidget(FanChartBaseWidget):
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self.draw_innerring(cr, child, userdata, startangle, angleinc)
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self.draw_innerring(cr, child, userdata, startangle, angleinc)
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startangle += angleinc
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startangle += angleinc
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def draw_text(self, cr, text, radius, start, stop, radial=False,
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fontcolor=(0, 0, 0), bold=False):
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"""
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Display text at a particular radius, between start and stop
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degrees.
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"""
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cr.save()
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font = Pango.FontDescription(self.fontdescr)
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fontsize = self.fontsize
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font.set_size(fontsize * Pango.SCALE)
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if bold:
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font.set_weight(Pango.Weight.BOLD)
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cr.set_source_rgb(fontcolor[0], fontcolor[1], fontcolor[2])
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if radial and self.radialtext:
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cr.save()
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layout = self.create_pango_layout(text)
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 5 # 5 pixel padding
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h = h / Pango.SCALE + 4 # 4 pixel padding
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#first we check if height is ok
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degneedheight = h / radius * (180 / math.pi)
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degavailheight = stop-start
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degoffsetheight = 0
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if degneedheight > degavailheight:
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#reduce height
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fontsize = degavailheight / degneedheight * fontsize / 2
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font.set_size(fontsize * Pango.SCALE)
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layout = self.create_pango_layout(text)
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 5 # 5 pixel padding
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h = h / Pango.SCALE + 4 # 4 pixel padding
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#first we check if height is ok
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degneedheight = h / radius * (180 / math.pi)
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degavailheight = stop-start
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if degneedheight > degavailheight:
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#we could not fix it, no text
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text = ""
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if text:
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#spread rest
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degoffsetheight = (degavailheight - degneedheight) / 2
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txlen = len(text)
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if w > PIXELS_PER_GENERATION:
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txlen = int(w/PIXELS_PER_GENERATION * txlen)
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cont = True
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while cont:
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layout = self.create_pango_layout(text[:txlen])
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 5 # 5 pixel padding
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h = h / Pango.SCALE + 4 # 4 pixel padding
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if w > PIXELS_PER_GENERATION:
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if txlen <= 1:
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cont = False
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txlen = 0
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else:
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txlen -= 1
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else:
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cont = False
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# offset for cairo-font system is 90
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rotval = self.rotate_value % 360 - 90
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if (start + rotval) % 360 > 179:
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pos = start + degoffsetheight + 90 - 90
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else:
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pos = stop - degoffsetheight + 180
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cr.rotate(pos * math.pi / 180)
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layout.context_changed()
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if (start + rotval) % 360 > 179:
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cr.move_to(radius+2, 0)
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else:
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cr.move_to(-radius-PIXELS_PER_GENERATION+6, 0)
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PangoCairo.show_layout(cr, layout)
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cr.restore()
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else:
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# center text:
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# 1. determine degrees of the text we can draw
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degpadding = 5 / radius * (180 / math.pi) # degrees for 5 pixel padding
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degneed = degpadding
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maxlen = len(text)
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for i in range(len(text)):
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layout = self.create_pango_layout(text[i])
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layout.set_font_description(font)
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w, h = layout.get_size()
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w = w / Pango.SCALE + 2 # 2 pixel padding after letter
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h = h / Pango.SCALE + 2 # 2 pixel padding
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degneed += w / radius * (180 / math.pi)
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if degneed > stop - start:
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#outside of the box
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maxlen = i
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break
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# 2. determine degrees over we can distribute before and after
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if degneed > stop - start:
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degover = 0
|
|
||||||
else:
|
|
||||||
degover = stop - start - degneed - degpadding
|
|
||||||
# 3. now draw this text, letter per letter
|
|
||||||
text = text[:maxlen]
|
|
||||||
|
|
||||||
# offset for cairo-font system is 90, padding used is 5:
|
|
||||||
pos = start + 90 + degpadding + degover / 2
|
|
||||||
# Create a PangoLayout, set the font and text
|
|
||||||
# Draw the layout N_WORDS times in a circle
|
|
||||||
for i in range(len(text)):
|
|
||||||
layout = self.create_pango_layout(text[i])
|
|
||||||
layout.set_font_description(font)
|
|
||||||
w, h = layout.get_size()
|
|
||||||
w = w / Pango.SCALE + 2 # 4 pixel padding after word
|
|
||||||
h = h / Pango.SCALE + 2 # 4 pixel padding
|
|
||||||
degneed = w / radius * (180 / math.pi)
|
|
||||||
if pos+degneed > stop + 90:
|
|
||||||
#failsafe, outside of the box, redo
|
|
||||||
break
|
|
||||||
|
|
||||||
cr.save()
|
|
||||||
cr.rotate(pos * math.pi / 180)
|
|
||||||
pos = pos + degneed
|
|
||||||
# Inform Pango to re-layout the text with the new transformation
|
|
||||||
layout.context_changed()
|
|
||||||
#width, height = layout.get_size()
|
|
||||||
#r.move_to(- (width / Pango.SCALE) / 2.0, - radius)
|
|
||||||
cr.move_to(0, - radius)
|
|
||||||
PangoCairo.show_layout(cr, layout)
|
|
||||||
cr.restore()
|
|
||||||
cr.restore()
|
|
||||||
|
|
||||||
def draw_gradient(self, cr, widget, halfdist):
|
|
||||||
gradwidth = 10
|
|
||||||
gradheight = 10
|
|
||||||
starth = 15
|
|
||||||
startw = 5
|
|
||||||
alloc = self.get_allocation()
|
|
||||||
x, y, w, h = alloc.x, alloc.y, alloc.width, alloc.height
|
|
||||||
cr.save()
|
|
||||||
|
|
||||||
cr.translate(-self.center_x, -self.center_y)
|
|
||||||
|
|
||||||
font = Pango.FontDescription(self.fontdescr)
|
|
||||||
fontsize = self.fontsize
|
|
||||||
font.set_size(fontsize * Pango.SCALE)
|
|
||||||
for color, text in zip(self.gradcol, self.gradval):
|
|
||||||
cr.move_to(startw, starth)
|
|
||||||
cr.rectangle(startw, starth, gradwidth, gradheight)
|
|
||||||
cr.set_source_rgb(color[0], color[1], color[2])
|
|
||||||
cr.fill()
|
|
||||||
layout = self.create_pango_layout(text)
|
|
||||||
layout.set_font_description(font)
|
|
||||||
cr.move_to(startw+gradwidth+4, starth)
|
|
||||||
cr.set_source_rgb(0, 0, 0) #black
|
|
||||||
PangoCairo.show_layout(cr, layout)
|
|
||||||
starth = starth+gradheight
|
|
||||||
cr.restore()
|
|
||||||
|
|
||||||
def fontcolor(self, r, g, b):
|
|
||||||
"""
|
|
||||||
return the font color based on the r, g, b of the background
|
|
||||||
"""
|
|
||||||
try:
|
|
||||||
return self.cache_fontcolor[(r, g, b)]
|
|
||||||
except KeyError:
|
|
||||||
hls = colorsys.rgb_to_hls(r/255, g/255, b/255)
|
|
||||||
# we use the lightness value to determine white or black font
|
|
||||||
if hls[1] > 0.4:
|
|
||||||
self.cache_fontcolor[(r, g, b)] = (0, 0, 0)
|
|
||||||
else:
|
|
||||||
self.cache_fontcolor[(r, g, b)] = (255, 255, 255)
|
|
||||||
return self.cache_fontcolor[(r, g, b)]
|
|
||||||
|
|
||||||
def fontbold(self, a):
|
|
||||||
"""
|
|
||||||
The font should be bold if no transparency and font is set.
|
|
||||||
In that case, True is returned
|
|
||||||
"""
|
|
||||||
if a >= 1. and self.filter:
|
|
||||||
return True
|
|
||||||
return False
|
|
||||||
|
|
||||||
def expand_parents(self, generation, selected, current):
|
def expand_parents(self, generation, selected, current):
|
||||||
if generation >= self.generations: return
|
if generation >= self.generations: return
|
||||||
selected = 2 * selected
|
selected = 2 * selected
|
||||||
@ -1356,6 +1369,8 @@ class FanChartWidget(FanChartBaseWidget):
|
|||||||
"""
|
"""
|
||||||
returns the person in generation generation at angle.
|
returns the person in generation generation at angle.
|
||||||
"""
|
"""
|
||||||
|
if generation == 0:
|
||||||
|
return 0
|
||||||
selected = None
|
selected = None
|
||||||
for p in range(len(self.angle[generation])):
|
for p in range(len(self.angle[generation])):
|
||||||
if self.data[generation][p][1]: # there is a person there
|
if self.data[generation][p][1]: # there is a person there
|
||||||
|
|||||||
Loading…
x
Reference in New Issue
Block a user