2a475eae62
Many tests and examples use drawText with a guess of how long the text is in bytes, or a call to strlen(). Add a helper to SkCanvas to simplify these examples. Add another helper for SkString. R=reed@google.com Change-Id: I0204a31e938f065606f08ee7cd9a6b36db791ee2 Reviewed-on: https://skia-review.googlesource.com/13642 Commit-Queue: Cary Clark <caryclark@google.com> Reviewed-by: Cary Clark <caryclark@google.com> Reviewed-by: Mike Reed <reed@google.com> Reviewed-by: Cary Clark <caryclark@skia.org>
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SampleCode.h"
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#include "SkBlurMask.h"
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#include "SkBlurMaskFilter.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkGraphics.h"
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#include "SkPath.h"
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#include "SkRandom.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkUtils.h"
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#include "SkColorPriv.h"
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#include "SkColorFilter.h"
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#include "SkTime.h"
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#include "SkTypeface.h"
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#include "SkView.h"
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#include "SkOSFile.h"
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#include "SkStream.h"
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class TextAlphaView : public SampleView {
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public:
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TextAlphaView() {
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fByte = 0xFF;
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}
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protected:
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// overrides from SkEventSink
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bool onQuery(SkEvent* evt) override {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "TextAlpha");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void onDrawContent(SkCanvas* canvas) override {
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const char* str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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SkPaint paint;
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SkScalar x = SkIntToScalar(10);
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SkScalar y = SkIntToScalar(20);
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paint.setFlags(0x105);
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paint.setARGB(fByte, 0xFF, 0xFF, 0xFF);
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paint.setMaskFilter(SkBlurMaskFilter::Make(kNormal_SkBlurStyle,
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SkBlurMask::ConvertRadiusToSigma(3)));
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SkRandom rand;
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for (int ps = 6; ps <= 35; ps++) {
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paint.setColor(rand.nextU() | (0xFF << 24));
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paint.setTextSize(SkIntToScalar(ps));
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paint.setTextSize(SkIntToScalar(24));
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canvas->drawString(str, x, y, paint);
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y += paint.getFontMetrics(nullptr);
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}
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}
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SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned) override {
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return new Click(this);
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}
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bool onClick(Click* click) override {
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int y = click->fICurr.fY;
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if (y < 0) {
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y = 0;
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} else if (y > 255) {
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y = 255;
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}
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fByte = y;
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this->inval(nullptr);
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return true;
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}
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private:
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int fByte;
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new TextAlphaView; }
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static SkViewRegister reg(MyFactory);
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