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fix(CustomMultiLineTextArea): measure text widths at scale factor to stop caret drift when clicking

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extio-de
2026-10-09 21:48:17 +02:00
parent 940fb86e64
commit d9dc25326a
1 changed files with 22 additions and 46 deletions
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68
src/main/java/de/extio/game_engine/renderer/g2d/control/components/CustomMultiLineTextArea.java
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@@ -86,8 +86,6 @@ public class CustomMultiLineTextArea extends Component {
private int cachedRawFontHeight = 0;
private int cachedSpaceWidth = 0;
private List<String> cachedWrappedLines = null;
private int cachedTextAreaWidth = -1;
@@ -112,7 +110,6 @@ public class CustomMultiLineTextArea extends Component {
public void setFontSize(final int fontSize) {
if (this.fontSize != fontSize) {
this.cachedLineHeight = 0;
this.cachedSpaceWidth = 0;
this.cachedFontSize = 0;
this.cachedRawFontHeight = 0;
this.cachedWrappedLines = null;
@@ -711,7 +708,7 @@ public class CustomMultiLineTextArea extends Component {
return wrapped;
}
final int lineWidth = G2DDrawFont.getTextDimensions(line, this.getGraphics(), this.fontSize, 1.0).getX();
final int lineWidth = G2DDrawFont.getTextDimensions(line, this.getGraphics(), this.fontSize, this.scaleFactor).getX();
if (lineWidth <= maxWidth) {
wrapped.add(line);
return wrapped;
@@ -722,7 +719,7 @@ public class CustomMultiLineTextArea extends Component {
for (final String word : words) {
final String testLine = currentLine.isEmpty() ? word : currentLine + " " + word;
final int testWidth = G2DDrawFont.getTextDimensions(testLine, this.getGraphics(), this.fontSize, 1.0).getX();
final int testWidth = G2DDrawFont.getTextDimensions(testLine, this.getGraphics(), this.fontSize, this.scaleFactor).getX();
if (testWidth <= maxWidth) {
if (!currentLine.isEmpty()) {
@@ -757,11 +754,12 @@ public class CustomMultiLineTextArea extends Component {
return this.cachedWrappedLines;
}
final int screenAreaWidth = toScreenCoord(textAreaWidth);
final List<String> rawLines = getLines();
final List<String> wrappedLines = new ArrayList<>();
for (final String rawLine : rawLines) {
wrappedLines.addAll(wrapLine(rawLine, textAreaWidth));
wrappedLines.addAll(wrapLine(rawLine, screenAreaWidth));
}
this.cachedWrappedLines = wrappedLines;
@@ -830,30 +828,6 @@ public class CustomMultiLineTextArea extends Component {
return height;
}
private int getSpaceWidth() {
if (this.cachedSpaceWidth > 0 && this.cachedFontSize == this.fontSize) {
return this.cachedSpaceWidth;
}
if (this.getGraphics() == null) {
return 10;
}
final int width0 = (int) G2DDrawFont.getTextDimensions("MM", this.getGraphics(), this.fontSize, 1.0).getX();
final int width1 = (int) G2DDrawFont.getTextDimensions("M M", this.getGraphics(), this.fontSize, 1.0).getX();
this.cachedSpaceWidth = width1 - width0;
this.cachedFontSize = this.fontSize;
return this.cachedSpaceWidth;
}
private int countTrailingSpaces(final String text) {
int count = 0;
for (int i = text.length() - 1; i >= 0 && text.charAt(i) == ' '; i--) {
count++;
}
return count;
}
private void updateCaretPosition(final int mouseX, final int mouseY) {
final List<String> wrappedLines = getWrappedLines();
final List<String> rawLines = getLines();
@@ -861,17 +835,19 @@ public class CustomMultiLineTextArea extends Component {
final int textAreaWidth = getTextAreaWidth();
// Convert mouse coordinates from screen pixels to logical coordinates
final int logicalMouseX = toLogicalCoord(mouseX);
final int logicalMouseY = toLogicalCoord(mouseY);
final int clickedWrappedLine = Math.max(0, Math.min(wrappedLines.size() - 1, (Math.max(0, logicalMouseY - CONTENT_MARGIN) + this.scrollOffsetY) / lineHeight));
final int screenAreaWidth = toScreenCoord(textAreaWidth);
final int clickX = mouseX - toScreenCoord(CONTENT_MARGIN);
int wrappedLineCount = 0;
int charOffset = 0;
for (int i = 0; i < rawLines.size(); i++) {
final String rawLine = rawLines.get(i);
final List<String> wrappedForThisLine = wrapLine(rawLine, textAreaWidth);
final List<String> wrappedForThisLine = wrapLine(rawLine, screenAreaWidth);
final int linesForThisRaw = wrappedForThisLine.size();
if (clickedWrappedLine >= wrappedLineCount && clickedWrappedLine < wrappedLineCount + linesForThisRaw) {
@@ -882,9 +858,8 @@ public class CustomMultiLineTextArea extends Component {
for (int j = 0; j <= clickedLine.length(); j++) {
final String substr = clickedLine.substring(0, j);
final int baseWidth = G2DDrawFont.getTextDimensions(substr, this.getGraphics(), this.fontSize, 1.0).getX();
final int textWidth = baseWidth + this.countTrailingSpaces(substr) * this.getSpaceWidth();
final int dist = Math.abs(textWidth - (logicalMouseX - CONTENT_MARGIN));
final int textWidth = G2DDrawFont.getTextAdvance(substr, this.getGraphics(), this.fontSize, this.scaleFactor);
final int dist = Math.abs(textWidth - clickX);
if (dist < bestDist) {
bestDist = dist;
bestPos = j;
@@ -942,7 +917,7 @@ public class CustomMultiLineTextArea extends Component {
break;
}
final List<String> wrappedForThisLine = wrapLine(rawLine, textAreaWidth);
final List<String> wrappedForThisLine = wrapLine(rawLine, toScreenCoord(textAreaWidth));
wrappedLineIndex += wrappedForThisLine.size();
charCount += rawLineLength;
}
@@ -973,12 +948,11 @@ public class CustomMultiLineTextArea extends Component {
return (int) (logicalCoord * this.scaleFactor);
}
private int getLogicalTextWidth(final Graphics2D g2d, final String text) {
private int getScreenTextWidth(final Graphics2D g2d, final String text) {
if (text == null || text.isEmpty()) {
return 0;
}
final int baseWidth = G2DDrawFont.getTextDimensions(text, g2d, this.fontSize, 1.0).getX();
return baseWidth + this.countTrailingSpaces(text) * this.getSpaceWidth();
return G2DDrawFont.getTextAdvance(text, g2d, this.fontSize, this.scaleFactor);
}
private void renderTextSegment(final Graphics2D g2d, final Color color, final int x, final int y, final String text) {
@@ -993,8 +967,11 @@ public class CustomMultiLineTextArea extends Component {
final String line, final int lineSelStart, final int lineSelEnd) {
final var beforeSelection = line.substring(0, lineSelStart);
final var throughSelection = line.substring(0, lineSelEnd);
final var selectionStartX = x + this.getLogicalTextWidth(g2d, beforeSelection);
final var selectionEndX = x + this.getLogicalTextWidth(g2d, throughSelection);
final int originX = this.toScreenCoord(x);
final int originY = this.toScreenCoord(y);
final int originHeight = this.toScreenCoord(lineHeight);
final var selectionStartX = originX + this.getScreenTextWidth(g2d, beforeSelection);
final var selectionEndX = originX + this.getScreenTextWidth(g2d, throughSelection);
final var selectionWidth = Math.max(0, selectionEndX - selectionStartX);
this.renderTextSegment(g2d, fgColor, x, y, line);
@@ -1003,10 +980,10 @@ public class CustomMultiLineTextArea extends Component {
}
g2d.setColor(theme.getSelectionPrimary().toColor());
g2d.fillRect(this.toScreenCoord(selectionStartX), this.toScreenCoord(y), this.toScreenCoord(selectionWidth), this.toScreenCoord(lineHeight));
g2d.fillRect(selectionStartX, originY, selectionWidth, originHeight);
final var previousClip = g2d.getClip();
g2d.clipRect(this.toScreenCoord(selectionStartX), this.toScreenCoord(y), this.toScreenCoord(selectionWidth), this.toScreenCoord(lineHeight));
g2d.clipRect(selectionStartX, originY, selectionWidth, originHeight);
this.renderTextSegment(g2d, theme.getBackgroundNormal().toColor(), x, y, line);
g2d.setClip(previousClip);
}
@@ -1261,9 +1238,8 @@ public class CustomMultiLineTextArea extends Component {
final String beforeCaret = caretPosInWrappedLine > 0 && caretPosInWrappedLine <= caretWrappedLine.length()
? caretWrappedLine.substring(0, caretPosInWrappedLine)
: "";
final var textDim = beforeCaret.isEmpty() ? ImmutableCoordI2.create(0, 0) : G2DDrawFont.getTextDimensions(beforeCaret, g2d, this.fontSize, this.scaleFactor);
final int trailingSpaceWidth = this.countTrailingSpaces(beforeCaret) * (int) (this.getSpaceWidth() * this.scaleFactor);
final int caretX = textDim.getX() + toScreenCoord(CONTENT_MARGIN) + trailingSpaceWidth;
final int caretAdvance = G2DDrawFont.getTextAdvance(beforeCaret, g2d, this.fontSize, this.scaleFactor);
final int caretX = caretAdvance + toScreenCoord(CONTENT_MARGIN);
final int caretY = (int) ((CONTENT_MARGIN + caretWrappedLineIndex * lineHeight - this.scrollOffsetY) * this.scaleFactor);
final int caretHeight = (int) (rawFontHeight * this.scaleFactor);