Differential D19164 Diff 53087 layers/selections/text/kpTextSelection_Paint.cpp

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layers/selections/text/kpTextSelection_Paint.cpp

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47#include <QPainter> 47​#include <QPainter>
48#include <QTextCharFormat> 48​#include <QTextCharFormat>
49 49​
50//--------------------------------------------------------------------- 50​//---------------------------------------------------------------------
51 51​
52void kpTextSelection::drawPreeditString(QPainter &painter, int &x, int y, const kpPreeditText &preeditText) const 52​void kpTextSelection::drawPreeditString(QPainter &painter, int &x, int y, const kpPreeditText &preeditText) const
53{ 53​{
54 int i = 0; 54​ int i = 0;
55 QString preeditString = preeditText.preeditString (); 55​ const QString& preeditString = preeditText.preeditString ();
56 QString str; 56​ QString str;
57 foreach (const QInputMethodEvent::Attribute &attr, preeditText.textFormatList ()) 57​ for (const auto &attr : preeditText.textFormatList ())
58 { 58​ {
59 int start = attr.start; 59​ int start = attr.start;
60 int length = attr.length; 60​ int length = attr.length;
61 QTextCharFormat format = qvariant_cast<QTextFormat> (attr.value).toCharFormat (); 61​ QTextCharFormat format = qvariant_cast<QTextFormat> (attr.value).toCharFormat ();
62 62​
63 if (i > start) 63​ if (i > start)
64 { 64​ {
65 length = length - i + start; 65​ length = length - i + start;
66 start = i; 66​ start = i;
67 } 67​ }
68 if (length <= 0) continue; 68​ if (length <= 0) {
69​ continue;
70​ }
69 71​
70 if (i < start) 72​ if (i < start)
71 { 73​ {
72 str = preeditString.mid (i, start - i); 74​ str = preeditString.mid (i, start - i);
73 painter.drawText (x, y, str); 75​ painter.drawText (x, y, str);
74 x += painter.fontMetrics ().width (str); 76​ x += painter.fontMetrics ().width (str);
75 } 77​ }
76 78​
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113 115​
114// public virtual [kpAbstractSelection] 116​// public virtual [kpAbstractSelection]
115void kpTextSelection::paint(QImage *destPixmap, const QRect &docRect) const 117​void kpTextSelection::paint(QImage *destPixmap, const QRect &docRect) const
116{ 118​{
117#if DEBUG_KP_SELECTION 119​#if DEBUG_KP_SELECTION
118 qCDebug(kpLogLayers) << "kpTextSelection::paint() textStyle: fcol=" 120​ qCDebug(kpLogLayers) << "kpTextSelection::paint() textStyle: fcol="
119 << (int *) d->textStyle.foregroundColor ().toQRgb () 121​ << (int *) d->textStyle.foregroundColor ().toQRgb ()
120 << " bcol=" 122​ << " bcol="
121 << (int *) d->textStyle.backgroundColor ().toQRgb () 123​ << (int *) d->textStyle.backgroundColor ().toQRgb ();
122 << endl; ​
123#endif 124​#endif
124 125​
125 // Drawing text is slow so if the text box will be rendered completely 126​ // Drawing text is slow so if the text box will be rendered completely
126 // outside of <destRect>, don't bother rendering it at all. 127​ // outside of <destRect>, don't bother rendering it at all.
127 const QRect modifyingRect = docRect.intersected (boundingRect ()); 128​ const QRect modifyingRect = docRect.intersected (boundingRect ());
128 if (modifyingRect.isEmpty ()) 129​ if (modifyingRect.isEmpty ()) {
129 return; 130​ return;
131​ }
130 132​
131 133​
132 // Is the text box completely invisible? 134​ // Is the text box completely invisible?
133 if (textStyle ().foregroundColor ().isTransparent () && 135​ if (textStyle ().foregroundColor ().isTransparent () &&
134 textStyle ().backgroundColor ().isTransparent ()) 136​ textStyle ().backgroundColor ().isTransparent ())
135 { 137​ {
136 return; 138​ return;
137 } 139​ }
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149 const QFontMetrics fontMetrics (theTextStyle.font ()); 151​ const QFontMetrics fontMetrics (theTextStyle.font ());
150 152​
151#if DEBUG_KP_SELECTION 153​#if DEBUG_KP_SELECTION
152 qCDebug(kpLogLayers) << "kpTextSelection_Paint.cpp:DrawTextHelper"; 154​ qCDebug(kpLogLayers) << "kpTextSelection_Paint.cpp:DrawTextHelper";
153 qCDebug(kpLogLayers) << "\theight=" << fontMetrics.height () 155​ qCDebug(kpLogLayers) << "\theight=" << fontMetrics.height ()
154 << " leading=" << fontMetrics.leading () 156​ << " leading=" << fontMetrics.leading ()
155 << " ascent=" << fontMetrics.ascent () 157​ << " ascent=" << fontMetrics.ascent ()
156 << " descent=" << fontMetrics.descent () 158​ << " descent=" << fontMetrics.descent ()
157 << " lineSpacing=" << fontMetrics.lineSpacing () 159​ << " lineSpacing=" << fontMetrics.lineSpacing ();
158 << endl; ​
159#endif 160​#endif
160 161​
161 QPainter painter(&floatImage); 162​ QPainter painter(&floatImage);
162 163​
163 // Fill in the background using the transparent/opaque tool setting 164​ // Fill in the background using the transparent/opaque tool setting
164 if ( theTextStyle.isBackgroundTransparent() ) 165​ if ( theTextStyle.isBackgroundTransparent() ) {
165 painter.fillRect(theWholeAreaRect, Qt::transparent); 166​ painter.fillRect(theWholeAreaRect, Qt::transparent);
166 else 167​ }
168​ else {
167 painter.fillRect(theWholeAreaRect, theTextStyle.backgroundColor().toQColor()); 169​ painter.fillRect(theWholeAreaRect, theTextStyle.backgroundColor().toQColor());
170​ }
168 171​
169 painter.setClipRect(theWholeAreaRect); 172​ painter.setClipRect(theWholeAreaRect);
170 painter.setPen(theTextStyle.foregroundColor().toQColor()); 173​ painter.setPen(theTextStyle.foregroundColor().toQColor());
171 painter.setFont(theTextStyle.font()); 174​ painter.setFont(theTextStyle.font());
172 175​
173 if ( theTextStyle.foregroundColor().toQColor().alpha() < 255 ) 176​ if ( theTextStyle.foregroundColor().toQColor().alpha() < 255 )
174 { 177​ {
175 // if the foreground color has an alpha channel, we want to 178​ // if the foreground color has an alpha channel, we want to
176 // see through the background, so we first need to punch holes 179​ // see through the background, so we first need to punch holes
177 // into the background where the text is 180​ // into the background where the text is
178 painter.setCompositionMode(QPainter::CompositionMode_Clear); 181​ painter.setCompositionMode(QPainter::CompositionMode_Clear);
179 182​
180 int baseLine = theTextAreaRect.y () + fontMetrics.ascent (); 183​ int baseLine = theTextAreaRect.y () + fontMetrics.ascent ();
181 foreach (const QString &str, theTextLines) 184​ for (const auto &str : theTextLines)
182 { 185​ {
183 painter.drawText (theTextAreaRect.x (), baseLine, str); 186​ painter.drawText (theTextAreaRect.x (), baseLine, str);
184 baseLine += fontMetrics.lineSpacing (); 187​ baseLine += fontMetrics.lineSpacing ();
185 188​
186 // if the next textline would already be below the visible text area, stop drawing 189​ // if the next textline would already be below the visible text area, stop drawing
187 if ( (baseLine - fontMetrics.ascent()) > (theTextAreaRect.y() + theTextAreaRect.height()) ) 190​ if ( (baseLine - fontMetrics.ascent()) > (theTextAreaRect.y() + theTextAreaRect.height()) ) {
188 break; 191​ break;
189 } 192​ }
193​ }
190 // the next text drawing will now blend the text foreground color with 194​ // the next text drawing will now blend the text foreground color with
191 // what is really below the text background 195​ // what is really below the text background
192 painter.setCompositionMode(QPainter::CompositionMode_SourceOver); 196​ painter.setCompositionMode(QPainter::CompositionMode_SourceOver);
193 } 197​ }
194 198​
195 // Draw a line at a time instead of using QPainter::drawText(QRect,...). 199​ // Draw a line at a time instead of using QPainter::drawText(QRect,...).
196 // Else, the line heights become >QFontMetrics::height() if you type Chinese 200​ // Else, the line heights become >QFontMetrics::height() if you type Chinese
197 // characters (!) and then the cursor gets out of sync. 201​ // characters (!) and then the cursor gets out of sync.
Show All 9 Lines209 {
207 drawPreeditString(painter, x, baseLine, thePreeditText); 211​ drawPreeditString(painter, x, baseLine, thePreeditText);
208 } 212​ }
209 } 213​ }
210 else 214​ else
211 { 215​ {
212 int i = 0; 216​ int i = 0;
213 int row = thePreeditText.position().y(); 217​ int row = thePreeditText.position().y();
214 int col = thePreeditText.position().x(); 218​ int col = thePreeditText.position().x();
215 foreach (const QString &str, theTextLines) 219​ for (const auto &str : theTextLines)
216 { 220​ {
217 if (row == i && !thePreeditText.isEmpty()) 221​ if (row == i && !thePreeditText.isEmpty())
218 { 222​ {
219 QString left = str.left(col); 223​ QString left = str.left(col);
220 QString right = str.mid(col); 224​ QString right = str.mid(col);
221 int x = theTextAreaRect.x(); 225​ int x = theTextAreaRect.x();
222 painter.drawText(x, baseLine, left); 226​ painter.drawText(x, baseLine, left);
223 x += fontMetrics.width(left); 227​ x += fontMetrics.width(left);
224 drawPreeditString(painter, x, baseLine, thePreeditText); 228​ drawPreeditString(painter, x, baseLine, thePreeditText);
225 229​
226 painter.drawText(x, baseLine, right); 230​ painter.drawText(x, baseLine, right);
227 } 231​ }
228 else 232​ else
229 { 233​ {
230 painter.drawText(theTextAreaRect.x (), baseLine, str); 234​ painter.drawText(theTextAreaRect.x (), baseLine, str);
231 } 235​ }
232 baseLine += fontMetrics.lineSpacing(); 236​ baseLine += fontMetrics.lineSpacing();
233 i++; 237​ i++;
234 238​
235 // if the next textline would already be below the visible text area, stop drawing 239​ // if the next textline would already be below the visible text area, stop drawing
236 if ( (baseLine - fontMetrics.ascent()) > (theTextAreaRect.y() + theTextAreaRect.height()) ) 240​ if ( (baseLine - fontMetrics.ascent()) > (theTextAreaRect.y() + theTextAreaRect.height()) ) {
237 break; 241​ break;
238 } 242​ }
239 } 243​ }
244​ }
240 245​
241 // ... convert that into "painting" transparent pixels on top of 246​ // ... convert that into "painting" transparent pixels on top of
242 // the document. 247​ // the document.
243 kpPixmapFX::paintPixmapAt (destPixmap, 248​ kpPixmapFX::paintPixmapAt (destPixmap,
244 modifyingRect.topLeft () - docRect.topLeft (), 249​ modifyingRect.topLeft () - docRect.topLeft (),
245 floatImage); 250​ floatImage);
246} 251​}
247 252​
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