Question

我有一个运行良好的Python Gimp脚本，但有一个问题：

当我需要在图像上放置多行时，我必须创建两个单独的文本图层。

             #Sample of text parameter xml file
        <txtLyrs>
        <extra_txtLyr>
        <extra_txtLyr txtLyrName="lblLayer6" LyrFontColor="WHITE" \
        LyrFontName="Interstate-Bold Bold" LyrFontSize="15.0" txtLyrString=\
        "Some Text" txtX="460" txtY="331" txtlyr_height="17" txtlyr_width="73" index="71" />
        <extra_txtLyr txtLyrName="lblLayer5" LyrFontColor="WHITE" \
        LyrFontName="Interstate-Bold Bold" LyrFontSize="8.0" txtLyrString=\
        "Some Text [10][13] Really Long Text" txtX="676" txtY="144" txtlyr_height="9"\
         txtlyr_width="95" index="70" />
        <extra_txtLyr txtLyrName="lblLayer4" LyrFontColor="WHITE" \
        LyrFontName="Interstate-Bold Bold" LyrFontSize="8.0" txtLyrString=\
        "Some Text" txtX="676" txtY="130" txtlyr_height="9" txtlyr_width="125" index="69" />
        <extra_txtLyr txtLyrName="lblLayer3" LyrFontColor="WHITE" \
        LyrFontName="Interstate-Bold Bold" LyrFontSize="15.0" txtLyrString=\
        "Some Text" txtX="678" txtY="331" txtlyr_height="17" txtlyr_width="72" index="68" />
        </extra_txtLyrs>
        </txtLyrs>

        #Constants removed to make smaller block

        #Helper function to read parameters from xml file
        def get_extratxt_btn_params( active_name ): 

            active_dgm = active_name
            extraTxtLayers = xmldoc.getElementsByTagName("txtLyrs")[0]

            if active_dgm:
                siteTxtLayers = xmldoc.getElementsByTagName("extra_txtLyr")[0]
                extraButtonTxtLayers = siteTxtLayers.getElementsByTagName("extra_txtLyr")
            else:
                siteTxtLayers = xmldoc.getElementsByTagName("other_txtLyr")[0]
                extraButtonTxtLayers = siteTxtLayers.getElementsByTagName("other_txtLyr")

            extraTxtParms = {}
            for lyrParm in extraButtonTxtLayers:
                lyrParams = [ lyrParm.getAttribute("txtLyrName"), \
                lyrParm.getAttribute("LyrFontName"), \
                lyrParm.getAttribute("LyrFontSize"), lyrParm.getAttribute("txtLyrString"), \
                lyrParm.getAttribute("LyrFontColor"), lyrParm.getAttribute("txtlyr_height"), \
                lyrParm.getAttribute("txtlyr_width"), lyrParm.getAttribute("txtX"), \
                lyrParm.getAttribute("txtY")]
                extraTxtParms [lyrParm.getAttribute("index")] = lyrParams
            return extraTxtParms

         ##**function called by GIMP to create text layers from xml file

        def dgm_extratxtlyr_create(image, drawable, title_color, inactive_color, active_color, \
        alarm_color, normal_color, active_diagram):

        txtlyrdict = get_extratxt_params( active_diagram )

        d_sorted_by_value = OrderedDict(sorted(txtlyrdict.items(), key=lambda x: x[1]))

        for k, txtlyr in d_sorted_by_value.items():
            #Assign Layer Text
            txtlayerName = txtlyr[3]
            #Assign Layer Font Name
            font_name = txtlyr[1]
            #Assign Font Size 
            font_size = txtlyr[2]

            #Assign Text color RGB values for colors are predefined constants because 
            #tuples don't pass correctly from xml

            if txtlyr[4] == "RED":
                textcolor = alarm_color
            elif txtlyr[4] == "WHITE":
                textcolor = inactive_color
            elif txtlyr[4] == "GREEN":
                textcolor = normal_color
            elif txtlyr[4] == "BLACK":
                textcolor = active_color

            #Assign Text X Coordinate
            xloc = txtlyr[7]
            #Assign Text Y Coordinate
            yloc = txtlyr[8]
            #Create the new text layer
            temp_layer = pdb.gimp_text_layer_new(image, txtlayerName, font_name, font_size, 0)
            #Add it to the image
            pdb.gimp_image_add_layer(image,temp_layer,-1)
            #Change the color of the text
            pdb.gimp_text_layer_set_color(temp_layer,textcolor)
            #Move the text to the proper location
            pdb.gimp_layer_translate(temp_layer, xloc, yloc)
            #Set the text justification
            pdb.gimp_text_layer_set_justification(temp_layer, 0)

当我知道它们太长时，如何告诉GIMP向文本图层添加换行符？

Answer 1

在调用pdb.gimp_text_layer_new之前，只需在文本字符串中添加“新行”字符。

顺便说一句，您命名为“txtlayerName”的变量（关于变量命名样式的注意事项）是图层的实际文本内容 - 而不仅仅是图层名称。碰巧GIMP通常默认按其内容命名文本图层 - gimp_text_layer_add_new采用的参数是图像上的实际文本内容。您还可以考虑使用更完整的调用：“pdb.gimp_text_fontname” - 它已经将图层添加到您想要的偏移处。

至于使用Python代码插入新行，就像使用强大的语法和字符串操作方法一样简单。例如，在创建图层之前，您可以做很多事情。

如果图层长度超过12个字符，则此代码段用新行替换空格，如果没有空格，则在每个6个字符处任意剪切。这是天真的，但你可以得到想法并塑造你的代码：

if len(txtlayerName) > 12:
   if " " in txtlayerName:
       txtlayerName = txtlayerName.replace(" ", "\n")
   else:
       textlayerName = "\n".join(txtlayerName[i:i+6] for i in range(0, len(txtlayerName), 6))

此片段允许更长的行，因为每行中有几个单词 - 假设您想要最大宽度为80个字符，并且文本中有几个以空格分隔的单词：

textwidth = 80
result = []
txtline = []
index = 0
for word in textlayerName.split():
    if index + len(word) <  textwidth:
        txtline.append(word)
        index += len(word)
    else:
        result.append(" ".join(txtline))
        txtline = [word]
        index = len(word)

textlayerName = "\n".join(result)

在python gimp 2.8.4脚本中添加换行符

1 个答案: