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Title: Add legend handler and artist for FancyArrow by magedhennawy · Pull Request #10688 · matplotlib/matplotlib · GitHub

Open Graph Title: Add legend handler and artist for FancyArrow by magedhennawy · Pull Request #10688 · matplotlib/matplotlib

X Title: Add legend handler and artist for FancyArrow by magedhennawy · Pull Request #10688 · matplotlib/matplotlib

Description: closes #8236 I added new legend handlers for FancyArrowPatch, Annotation artists and HandlerAnnotation. HandlerAnnotation can draw FancyArrowPatch artist in the legend: if the annotation has an arrow, it uses HandlerFancyArrowPatch to draw an arrow Example code: import matplotlib.pylab as plt from matplotlib.patches import FancyArrowPatch from matplotlib.legend_handler import HandlerAnnotation fig, ax = plt.subplots(1) ax.plot([0, 1], [0, 0], label='line1') ax.plot([0, 1], [1, 1], label='line2') ax.annotate("", xy=(0.3,1.0), xytext=(0.3,0.0), arrowprops={'arrowstyle':'<->', 'color':'C7' }, label='distance') ax.legend() plt.show() **************** Added extra features. ****************** after merge with #8292 I added new legend handlers for Text, FancyArrowPatch and Annotation artists (HandlerText, HandlerFancyArrowPatch and HandlerAnnotation). HandlerAnnotation can draw different artists in the legend: if the annotation has no text and no arrow, it draws a white Rectangle if the annotation has only text, it uses HandlerText to draw a text. The text is replaced by 'Aa' if it is longer than one character. (This is configurable by setting rep_str and rep_maxlen.) if the annotation has only an arrow, it uses HandlerFancyArrowPatch to draw an arrow If the annotation has both text and arrow, it uses HandlerTuple to draw both. In HandlerTuple, I added the possibility of different width ratios for the artists. HandlerAnnotation uses a width_ratios=[1,4] (ie. the arrow is 4 times wider than the text). Example code: import matplotlib.pylab as plt from matplotlib.patches import FancyArrowPatch from matplotlib.legend_handler import HandlerAnnotation fig, ax = plt.subplots(1) ax.plot([0, 1], [0, 0], label='line1') ax.plot([0, 1], [1, 1], label='line2') # no text, no arrow ax.annotate("", xy=(0.1,0.5), xytext=(0.1,0.5), label='annotation (empty)') # text, no arrow my_annotation = ax.annotate("X", xy=(0.1,0.5), xytext=(0.1,0.5), color='C2', label='annotation (text, no arrow)') # no text, arrow ax.annotate("", xy=(0.3,1.0), xytext=(0.3,0.0), arrowprops={'arrowstyle':'<->', 'color':'C7' }, label='annotation (no text, arrow)') # text, arrow ax.annotate("Some long string", xy=(0.4,1.0), xytext=(0.35,0.1), arrowprops={'arrowstyle':'->', 'color':'C2' }, color='C1', label='annotation (text + arrow)') # Fancy arrow patch arrpatch = FancyArrowPatch([0.5, 0.8], [0.9, 0.9], arrowstyle='<|-', mutation_scale=20, color='C3', label='arrowpatch') ax.add_patch(arrpatch) # Long text, will not be used in legend ax.text(x=0.1, y=0.1, s='Hello', color='C5', label='text') # Short text, copied in legend ax.text(x=0.1, y=0.2, s='Z', color='C0', label='short text') ax.legend(handler_map={my_annotation: HandlerAnnotation(rep_str='Abcde', rep_maxlen=0)}) fig.show()

Open Graph Description: closes #8236 I added new legend handlers for FancyArrowPatch, Annotation artists and HandlerAnnotation. HandlerAnnotation can draw FancyArrowPatch artist in the legend: if the annotation has an arr...

X Description: closes #8236 I added new legend handlers for FancyArrowPatch, Annotation artists and HandlerAnnotation. HandlerAnnotation can draw FancyArrowPatch artist in the legend: if the annotation has an arr...

Opengraph URL: https://github.com/matplotlib/matplotlib/pull/10688

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