QXmlStreamReader を使用して XML ファイルを処理しています。読み取りループは非常に単純です。
if ( !file.open(QFile::ReadOnly | QFile::Text) ) {
strErrors.append(mcszConfigFile);
strErrors.append("\n\nDoes not exists!\n\n");
}
xmlrdr.setDevice(&file);
xmlrdr.readNext();
blnRootFound = false;
while( !xmlrdr.atEnd() ) {
/* [Edit] This shouldn't be here! if ( xmlrdr.isStartElement() ) */{
QXmlStreamAttributes attrs = xmlrdr.attributes();
QStringRef srfNodeName = xmlrdr.name();
bool blnEndElement = xmlrdr.isEndElement();
bool blnStartElement = xmlrdr.isStartElement();
bool blnInvalid = true;
if ( attrs.length() > 0 ) {
QString strID, strNodeName = srfNodeName.toString();
if ( attrs.hasAttribute(mcszXMLattrID) == false ) {
strErrors.append("Node: ");
strErrors.append(qPrintable(srfNodeName.toString()));
strErrors.append("Has no id!\n");
break;
}
strID = attrs.value(mcszXMLattrID).toString();
if ( strNodeName.compare(mcszXMLnodeRoot) == 0 ) {
blnRootFound = true;
blnInvalid = false;
mstrRootID = strID;
} else if ( strNodeName.compare(mcszXMLnodeButton) == 0
|| strNodeName.compare(mcszXMLnodeButtonBar) == 0
|| strNodeName.compare(mcszXMLnodeOption) == 0 ) {
blnInvalid = false;
} else if ( strNodeName.compare(mcszXMLnodeControl) == 0 ) {
for( int t=0; mcpszValidControlTypes[t]!=NULL; t++ ) {
if ( strID.compare(mcpszValidControlTypes[t]) == 0 ) {
blnInvalid = false;
break;
}
}
}
if ( strID.length() > 0 && blnInvalid == false ) {
clsXMLnode objNode = clsXMLnode(strNodeName, &attrs, this);
msmapNodes.insert(std::pair<QString, clsXMLnode>(strID, objNode));
msmapAreas.insert(std::pair<QString, QRect>(strID, objNode.rctGetGeom()));
if ( blnStartElement == true ) {
}
}
}
}
xmlrdr.readNext();
}
if ( file.isOpen() ) {
file.close();
}
私が読んでいるXML：
<?xml version="1.0" encoding="utf-8"?>
<!--
Node: gui
Attrbuttes: left, right, top and bottom defines the pixel white space to allow
from the edge of the display
language, should be set to the appropriate country code, an XML file named using
the country code must exist, e.g. 44.xml
//-->
<gui id="root" bottom="0" left="0" right="0" top="24" language="44">
<control id="trainstrip"
x="(center:SCREEN) - (25%:SCREEN_WIDTH)" y="(top:SCREEN)" height="40px" width="(50%:SCREEN_WIDTH)"/>
<control id="elevationstrip"
x="(left:trainstrip) - 56px" y="(top:trainstrip) + (height:trainstrip) + 24px" width="56px" height="{75%:SCREEN_HEIGHT}"/>
<control id="lofmimics"
color_arc="#ffaaaaaa"
color_axis="#fff0000"
color_bg="#ffaaaaaa"
color_needle="#ffffff00"
color_min_limit="#ffbbbb00"
color_max_limit="#ffcc00cc"
color_port="#ff00aa00"
color_starboard="'#ffaa0000"
elevation_height="275px"
elevation_mech_max="85"
elevation_mech_min="-10"
elevation_max="85"
elevation_margin_left="64px"
elevation_margin_bottom="64px"
elevation_min="-10"
elevation_pensize_limit="3"
elevation_pensize_reading="3"
elevation_width="[elevation_height]"
elevation_x="0px"
elevation_y="0px"
training_mech_starboard="170"
training_mech_port="-170"
training_pensize_port="5"
training_pensize_starboard="5"
training_pensize_limit="3"
training_pensize_reading="3"
training_starboard="150"
training_port="-150"
training_width="(left:elevationstrip)"
training_height="([training_width])"
training_x="([elevation_x])"
training_y="([elevation_height])"
x="(left:SCREEN)"
width="([x]:elevationstrip)"
height="([training_height]) + ([elevation_height])"
y="(bottom:SCREEN) - ([height])"/>
<buttonbar id="modes"
height="50%"
width="100px"
x="(RIGHT:SCREEN) - ([width])"
y="(TOP:SCREEN)"
title="MODE"
color_bg="#ffaaaaaa"
border="inset:#ffcccccc,#ff333333"
button_height="24px"
button_width="80px"
vertical_space="4px">
<button id="btnsetup" color_bg="#ff3399ff" x="0px" y="{top:modes}">
<option value="0" text="operate<"/>
<option value="1" text="setup"/>
<option value="2" text="install"/>
<option value="3" text="startup"/>
<option value="4" text="shutdown"/>
</button>
</buttonbar>
</gui>
私が抱えている問題は、フラグ blnEndElement と blnStartElement が、ファイルの読み取り時に正しい状態を正確に反映していないように見えることです。blnEndElement は常に false で、blnStartElement は常に true です。
私がやりたいことは、XML の読み取りと処理中にノード/要素階層を構築することです。