Fixbrushhistory (#9)

* fix brush history redraw, clearRect use right width heights

* fix brush history redraw, clearRect user proper width heights

src/components/parts/BrushCanvas.vue

@@ -144,7 +144,7 @@ export default {
       return filterNullBlocks(blocks)
     },
     drawPreview() {
-      this.ctx.clearRect(0, 0, this.canvasName.width, this.canvasName.height);
+      this.ctx.clearRect(0, 0, this.$refs[this.canvasName].width, this.$refs[this.canvasName].height);
       this.ctx.fillStyle = this.mircColours[1];
 
       const BLOCK_WIDTH = this.currentAscii.blockWidth;

src/components/parts/MainBrushCanvas.vue

@@ -154,7 +154,7 @@ export default {
       return filterNullBlocks(blocks);
     },
     drawPreview() {
-      this.ctx.clearRect(0, 0, 10000, 10000);
+      this.ctx.clearRect(0, 0, this.$refs.brushcanvas.width, this.$refs.brushcanvas.height);
       this.ctx.fillStyle = this.mircColours[1];
 
       const BLOCK_WIDTH = this.currentAscii.blockWidth;
@@ -200,8 +200,6 @@ export default {
             }
           }
         }
-
-        this.ctx.stroke();
       }
     },
     delayRedrawCanvas() {