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DOC: Simplify annotation arrow style reference (#29755)

Position everything in data coordiates rather than Axes coordinates. While the code annotate() is not the primary goal of this example, it's slightly simpler to follow if we keep everything in data coordinates, which is what all the commands (plot, text, annotate) are by default in.The output is basically unchanged, with the exception of making the point marker and the textbox edge dark grey so that the black annotation line stands out more.

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galleries/examples/text_labels_and_annotations
- fancyarrow_demo.py

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`‎galleries/examples/text_labels_and_annotations/fancyarrow_demo.py`

Lines changed: 12 additions & 16 deletions

Original file line number	Diff line number	Diff line change
`@@ -19,35 +19,31 @@`
`19`	`19`	`nrow= (len(styles)+1)//ncol`
`20`	`20`	`axs= (plt.figure(figsize=(4*ncol,1+nrow))`
`21`	`21`	`.add_gridspec(1+nrow,ncol,`
`22`		`-wspace=.7,left=.1,right=.9,bottom=0,top=1).subplots())`
	`22`	`+wspace=0,hspace=0,left=0,right=1,bottom=0,top=1).subplots())`
`23`	`23`	`foraxinaxs.flat:`
	`24`	`+ax.set_xlim(-0.5,4)`
`24`	`25`	`ax.set_axis_off()`
`25`	`26`	`foraxinaxs[0, :]:`
`26`		`-ax.text(0,.5,"arrowstyle",`
`27`		`-transform=ax.transAxes,size="large",color="tab:blue",`
`28`		`-horizontalalignment="center",verticalalignment="center")`
`29`		`-ax.text(.35,.5,"default parameters",`
`30`		`-transform=ax.transAxes,`
`31`		`-horizontalalignment="left",verticalalignment="center")`
	`27`	`+ax.text(-0.25,0.5,"arrowstyle",size="large",color="tab:blue")`
	`28`	`+ax.text(1.25,.5,"default parameters",size="large")`
`32`	`29`	`forax, (stylename,stylecls)inzip(axs[1:, :].T.flat,styles.items()):`
`33`		`-l,=ax.plot(.25,.5,"ok",transform=ax.transAxes)`
`34`		`-ax.annotate(stylename, (.25,.5), (-0.1,.5),`
`35`		`-xycoords="axes fraction",textcoords="axes fraction",`
`36`		`-size="large",color="tab:blue",`
`37`		`-horizontalalignment="center",verticalalignment="center",`
	`30`	`+# draw dot and annotation with arrowstyle`
	`31`	`+l,=ax.plot(1,0,"o",color="grey")`
	`32`	`+ax.annotate(stylename, (1,0), (0,0),`
	`33`	`+size="large",color="tab:blue",ha="center",va="center",`
`38`	`34`	`arrowprops=dict(`
`39`	`35`	`arrowstyle=stylename,connectionstyle="arc3,rad=-0.05",`
`40`	`36`	`color="k",shrinkA=5,shrinkB=5,patchB=l,`
`41`	`37`	`),`
`42`		`-bbox=dict(boxstyle="square",fc="w"))`
	`38`	`+bbox=dict(boxstyle="square",fc="w",ec="grey"))`
	`39`	`+# draw default parameters`
`43`	`40`	`# wrap at every nth comma (n = 1 or 2, depending on text length)`
`44`	`41`	`s=str(inspect.signature(stylecls))[1:-1]`
`45`	`42`	`n=2ifs.count(',')>3else1`
`46`		`-ax.text(.35,.5,`
	`43`	`+ax.text(1.25,0,`
`47`	`44`	`re.sub(', ',lambdam,c=itertools.count(1):m.group()`
`48`	`45`	`ifnext(c)%nelse'\n',s),`
`49`		`-transform=ax.transAxes,`
`50`		`-horizontalalignment="left",verticalalignment="center")`
	`46`	`+verticalalignment="center")`
`51`	`47`
`52`	`48`	`plt.show()`
`53`	`49`

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Commita79ae37

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`‎galleries/examples/text_labels_and_annotations/fancyarrow_demo.py`

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