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Simple.vue
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Simple.vue
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<template>
<Page>
<ActionBar title="Simple Demo" />
<StackLayout>
<CanvasView width="100" height="100" @draw="onDraw"></CanvasView>
<Label fontSize="16" width="100" height="100" backgroundColor="yellow">test</Label>
</StackLayout>
</Page>
</template>
<script lang="ts">
import { Frame } from '@nativescript/core/ui/frame';
import Vue from 'nativescript-vue';
import { Component } from 'vue-property-decorator';
import { Canvas, Paint, Style, createRect } from '@nativescript-community/ui-canvas';
import { Color } from '@nativescript/core';
import { Screen } from '@nativescript/core/platform';
import { Path } from '@nativescript-community/ui-canvas';
import { Direction } from '@nativescript-community/ui-canvas';
@Component
export default class Simple extends Vue {
onBack() {
Frame.topmost().goBack();
}
onDraw(event: { canvas: Canvas }) {
const canvas = event.canvas;
// const deviceScale = screen.mainScreen.scale;
// canvas.scale(deviceScale, deviceScale); // always scale to device density to work with dp
// canvas.setDensity(Math.round(scale * 160));
// canvas.scale(DEFAULT_SCALE, DEFAULT_SCALE); // always scale to device density
console.log('onDraw canvas:', canvas.getWidth(), canvas.getHeight());
const bgPaint = new Paint();
bgPaint.setAntiAlias(true);
bgPaint.setTextSize(16);
bgPaint.setColor('yellow');
bgPaint.strokeWidth = 10;
// rect
canvas.drawRect(createRect(0, 0, 100, 100), bgPaint);
bgPaint.setStyle(Style.STROKE);
bgPaint.setColor(new Color(255, 0, 255, 0));
canvas.drawRect(createRect(10, 10, 80, 80), bgPaint);
bgPaint.setStyle(Style.STROKE);
bgPaint.strokeWidth = 1;
bgPaint.setColor(new Color(255, 255, 255, 0));
canvas.drawRect(createRect(0, 0, 50, 50), bgPaint);
bgPaint.setStyle(Style.FILL);
bgPaint.setColor(new Color(255, 0, 0, 0));
canvas.drawText('test', 0, 20, bgPaint);
const path = new Path();
const rect = createRect(10, 10, 40, 60);
console.log('rect', rect)
path.addRoundRect(rect.left, rect.top, rect.right, rect.bottom, [5, 5, 5, 5, 5,5, 0,0], Direction.CW)
canvas.drawPath(path, bgPaint);
}
}
</script>