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Change the way you draw guide text. #156

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Change the way you draw guide text. #156

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35 changes: 21 additions & 14 deletions card.io/src/main/java/io/card/payment/OverlayView.java
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Original file line number Diff line number Diff line change
Expand Up @@ -104,6 +104,7 @@ class OverlayView extends View {
private GradientDrawable mGradientDrawable;
private final Paint mGuidePaint;
private final Paint mLockedBackgroundPaint;
private final TextPaint mGuideTextPaint;
private Path mLockedBackgroundPath;
private Rect mCameraPreviewRect;
private final Torch mTorch;
Expand Down Expand Up @@ -133,6 +134,11 @@ public OverlayView(CardIOActivity captureActivity, AttributeSet attributeSet, bo
mLockedBackgroundPaint.clearShadowLayer();
mLockedBackgroundPaint.setStyle(Paint.Style.FILL);
mLockedBackgroundPaint.setColor(0xbb000000); // 75% black

// Set up paint attributes
mGuideTextPaint = new TextPaint();
Util.setupTextPaintStyle(mGuideTextPaint);
mGuideTextPaint.setTextAlign(Align.CENTER);

scanInstructions = LocalizedStrings.getString(StringKey.SCAN_GUIDE);
}
Expand Down Expand Up @@ -338,26 +344,27 @@ public void onDraw(Canvas canvas) {

if (mDInfo.numVisibleEdges() < 3) {
// Draw guide text
// Set up paint attributes
float guideHeight = GUIDE_LINE_HEIGHT * mScale;
float guideFontSize = GUIDE_FONT_SIZE * mScale;

Util.setupTextPaintStyle(mGuidePaint);
mGuidePaint.setTextAlign(Align.CENTER);
mGuidePaint.setTextSize(guideFontSize);

// Translate and rotate text
canvas.translate(mGuide.left + mGuide.width() / 2, mGuide.top + mGuide.height() / 2);
canvas.rotate(mRotationFlip * mRotation);
mGuideTextPaint.setTextSize(guideFontSize);

int textWidth = mRotationFlip == 1 ? mGuide.width() : mGuide.height();
if (scanInstructions != null && scanInstructions != "") {
String[] lines = scanInstructions.split("\n");
float y = -(((guideHeight * (lines.length - 1)) - guideFontSize) / 2) - 3;
StaticLayout sl = new StaticLayout(scanInstructions, mGuideTextPaint, textWidth, Layout.Alignment.ALIGN_NORMAL, 1, 0, false);

int dx = mGuide.left + (mGuide.width() / 2);
int dy = mGuide.top + (mGuide.height() / 2);

for (int i = 0; i < lines.length; i++) {
canvas.drawText(lines[i], 0, y, mGuidePaint);
y += guideHeight;
int moveToCenter = mRotation / 90 > 1 ? 1 : -1;

if (mRotationFlip == 1) {
canvas.translate(dx, dy + (sl.getHeight() / 2) * moveToCenter);
}else {
canvas.translate(dx + (sl.getHeight() / 2) * moveToCenter, dy);
}

canvas.rotate(mRotationFlip * mRotation);
sl.draw(canvas);
}
}
}
Expand Down