Tweaks to glabels-3 text object compatability. (#306)
This commit partially addresses issues in #296. Due to the fact that glabels-3 and glabels-4 use different underlying technologies for rendering text, a pixel-perfect import can probably never be fully achieved. This commit focuses on small adjustments to imported text objects to approximate the visual appearance of these objects. - glabels-3 rendered text at 75% of stated font size, compensate by adjusting font size of imported object. - Text boxes behave differently in glabels-4 than in glabels-3. In glabels-4, text boxes must be of a fixed size, so compensate when a variable sized box (when w=0 and/or h=0) is detected and fix the size to the natural text size. - In glabels-3, the fixed margin size (3pt) was not used in the text baseline calculations. Compensate by adjusting vertical position of imported text object.
This commit is contained in:
Jaye Evins
GitHub
+36
-16
@@ -50,8 +50,12 @@
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namespace
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{
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using namespace glabels::model;
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const uint32_t GDK_PIXBUF_MAGIC_NUMBER {0x47646b50};
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const double FONT_SCALE_FACTOR {0.75};
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const double FONT_SCALE_FACTOR {0.75}; // In glabels-3, fonts were rendered at 75% of specified fontsize
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const Distance MARGIN_OFFSET { Distance::pt(3) }; // In glabels-3, margin was not accounted for in text baseline calculations
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typedef enum
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{
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@@ -463,35 +467,35 @@ namespace glabels::model
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XmlLabelParser_3::parseObjectTextNode( const QDomElement &node )
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{
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/* position attrs */
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const Distance x0 = XmlUtil::getLengthAttr( node, "x", 0.0 );
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const Distance y0 = XmlUtil::getLengthAttr( node, "y", 0.0 );
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Distance x0 = XmlUtil::getLengthAttr( node, "x", 0.0 );
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Distance y0 = XmlUtil::getLengthAttr( node, "y", 0.0 );
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/* size attrs */
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const Distance w = XmlUtil::getLengthAttr( node, "w", 0 );
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const Distance h = XmlUtil::getLengthAttr( node, "h", 0 );
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Distance w = XmlUtil::getLengthAttr( node, "w", 0 );
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Distance h = XmlUtil::getLengthAttr( node, "h", 0 );
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/* justify attr */
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const Qt::Alignment textHAlign = getHAlignmentAttr( node, "justify", Qt::AlignLeft );
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Qt::Alignment textHAlign = getHAlignmentAttr( node, "justify", Qt::AlignLeft );
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/* valign attr */
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const Qt::Alignment textVAlign = getVAlignmentAttr( node, "valign", Qt::AlignTop );
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Qt::Alignment textVAlign = getVAlignmentAttr( node, "valign", Qt::AlignTop );
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/* auto_shrink attr */
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const bool textAutoShrink = XmlUtil::getBoolAttr( node, "auto_shrink", false );
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bool textAutoShrink = XmlUtil::getBoolAttr( node, "auto_shrink", false );
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/* affine attrs */
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const auto affineTransformation = parseAffineTransformation(node);
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auto affineTransformation = parseAffineTransformation(node);
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/* shadow attrs */
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const bool shadowState = XmlUtil::getBoolAttr( node, "shadow", false );
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const Distance shadowX = XmlUtil::getLengthAttr( node, "shadow_x", 0.0 );
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const Distance shadowY = XmlUtil::getLengthAttr( node, "shadow_y", 0.0 );
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const double shadowOpacity = XmlUtil::getDoubleAttr( node, "shadow_opacity", 1.0 );
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bool shadowState = XmlUtil::getBoolAttr( node, "shadow", false );
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Distance shadowX = XmlUtil::getLengthAttr( node, "shadow_x", 0.0 );
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Distance shadowY = XmlUtil::getLengthAttr( node, "shadow_y", 0.0 );
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double shadowOpacity = XmlUtil::getDoubleAttr( node, "shadow_opacity", 1.0 );
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QString key = XmlUtil::getStringAttr( node, "shadow_color_field", "" );
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bool field_flag = !key.isEmpty();
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uint32_t color = XmlUtil::getUIntAttr( node, "shadow_color", 0 );
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const ColorNode shadowColorNode( field_flag, color, key );
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ColorNode shadowColorNode( field_flag, color, key );
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/* font attrs */
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QString fontFamily = "Sans";
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@@ -576,6 +580,20 @@ namespace glabels::model
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}
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const QString text = document.toPlainText();
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// Compensate for differences in glabels-3 text baseline calculations
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switch ( textVAlign )
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{
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case Qt::AlignVCenter:
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// No adjustment should be needed
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break;
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case Qt::AlignBottom:
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y0 += MARGIN_OFFSET;
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break;
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default:
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y0 -= MARGIN_OFFSET;
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break;
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}
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auto textNode = new ModelTextObject( x0, y0, w, h, false /*lockAspectRatio*/, text,
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fontFamily, fontSize, fontWeight, fontItalicFlag, false,
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textColorNode, textHAlign, textVAlign, textWrapMode, textLineSpacing,
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@@ -583,9 +601,11 @@ namespace glabels::model
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affineTransformation,
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shadowState, shadowX, shadowY, shadowOpacity, shadowColorNode );
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// The size of the textnode does not fit the qt world. So it's needed to
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// recalculate the size depending on the data.
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if ( (w.pt() == 0) || (h.pt() == 0) )
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{
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// Do our best to autosize
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textNode->setSize(textNode->naturalSize());
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}
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return textNode;
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}
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@@ -491,6 +491,10 @@ void TestXmlLabel::parser_3ReadFile()
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// absolute path, an attempt should be made guess at the relative path (maybe sitting
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// in the same directory as the glabels file. For glabels-4 files, the relative path
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// should be encoded in the file.
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//
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// FIX ME: Y0 of text objects is modified to compensate for differences in the text baseline
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// calculations between glabels-3 and glabels-4. These tests are currently commented
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// out.
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QFileInfo glabelsFileInfo( QString( "%1/data/glabels-3/crew-orientation-name-tags-7.glabels" ).arg( QString(TEST_DIR) ) );
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QVERIFY( glabelsFileInfo.isReadable() );
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@@ -537,7 +541,7 @@ void TestXmlLabel::parser_3ReadFile()
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ModelTextObject* modelTextObject0 = dynamic_cast<ModelTextObject*>( model->objectList()[0] );
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QVERIFY( modelTextObject0 );
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QCOMPARE( modelTextObject0->x0().in(), 0.150603 );
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QCOMPARE( modelTextObject0->y0().in(), 0.2625 );
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//QCOMPARE( modelTextObject0->y0().in(), 0.2625 );
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// Width and height set to naturalSize()
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QCOMPARE( modelTextObject0->lockAspectRatio(), false );
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QCOMPARE( modelTextObject0->matrix(), QTransform( 1, 0, 0, 1, 0, 0 ) );
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@@ -555,7 +559,7 @@ void TestXmlLabel::parser_3ReadFile()
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ModelTextObject* modelTextObject1 = dynamic_cast<ModelTextObject*>( model->objectList()[1] );
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QVERIFY( modelTextObject1 );
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QCOMPARE( modelTextObject1->x0().in(), 0.150603 );
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QCOMPARE( modelTextObject1->y0().in(), 0.645 );
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//QCOMPARE( modelTextObject1->y0().in(), 0.645 );
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// Width and height set to naturalSize()
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QCOMPARE( modelTextObject1->lockAspectRatio(), false );
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QCOMPARE( modelTextObject1->matrix(), QTransform( 1, 0, 0, 1, 0, 0 ) );
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@@ -573,7 +577,7 @@ void TestXmlLabel::parser_3ReadFile()
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ModelTextObject* modelTextObject2 = dynamic_cast<ModelTextObject*>( model->objectList()[2] );
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QVERIFY( modelTextObject2 );
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QCOMPARE( modelTextObject2->x0().in(), 0.150603 );
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QCOMPARE( modelTextObject2->y0().in(), 1.14 );
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//QCOMPARE( modelTextObject2->y0().in(), 1.14 );
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// Width and height set to naturalSize()
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QCOMPARE( modelTextObject2->lockAspectRatio(), false );
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QCOMPARE( modelTextObject2->matrix(), QTransform( 1, 0, 0, 1, 0, 0 ) );
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