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Logarithmic scale now has labels

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Evert Timberg 2015-09-20 19:06:09 -04:00
parent b1060f20ec
commit 2667807c1d
1 changed files with 51 additions and 0 deletions
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51
src/scales/scale.logarithmic.js
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@ -20,6 +20,20 @@
zeroLineColor: "rgba(0,0,0,0.25)",
},
// scale label
scaleLabel: {
fontColor: '#666',
fontFamily: 'Helvetica Neue',
fontSize: 12,
fontStyle: 'normal',
// actual label
labelString: '',
// display property
show: false,
},
// scale numbers
reverse: false,
override: null,
@ -353,6 +367,15 @@
minSize.height = maxHeight; // fill all the height
}
// Are we showing a label for the scale?
if (this.options.scaleLabel.show) {
if (this.isHorizontal()) {
minSize.height += (this.options.scaleLabel.fontSize * 1.5);
} else {
minSize.width += (this.options.scaleLabel.fontSize * 1.5);
}
}
this.paddingLeft = 0;
this.paddingRight = 0;
this.paddingTop = 0;
@ -501,6 +524,18 @@
}
}, this);
}
if (this.options.scaleLabel.show) {
// Draw the scale label
this.ctx.textAlign = "center";
this.ctx.textBaseline = 'middle';
this.ctx.font = helpers.fontString(this.options.scaleLabel.fontSize, this.options.scaleLabel.fontStyle, this.options.scaleLabel.fontFamily);
var scaleLabelX = this.left + ((this.right - this.left) / 2); // midpoint of the width
var scaleLabelY = this.options.position == 'bottom' ? this.bottom - (this.options.scaleLabel.fontSize / 2) : this.top + (this.options.scaleLabel.fontSize / 2);
this.ctx.fillText(this.options.scaleLabel.labelString, scaleLabelX, scaleLabelY);
}
} else {
// Vertical
if (this.options.gridLines.show) {
@ -580,6 +615,22 @@
this.ctx.fillText(label, labelStartX, yValue);
}, this);
}
if (this.options.scaleLabel.show) {
// Draw the scale label
var scaleLabelX = this.options.position == 'left' ? this.left + (this.options.scaleLabel.fontSize / 2) : this.right - (this.options.scaleLabel.fontSize / 2);
var scaleLabelY = this.top + ((this.bottom - this.top) / 2);
var rotation = this.options.position == 'left' ? -0.5 * Math.PI : 0.5 * Math.PI;
this.ctx.save();
this.ctx.translate(scaleLabelX, scaleLabelY);
this.ctx.rotate(rotation);
this.ctx.textAlign = "center";
this.ctx.font = helpers.fontString(this.options.scaleLabel.fontSize, this.options.scaleLabel.fontStyle, this.options.scaleLabel.fontFamily);
this.ctx.textBaseline = 'middle';
this.ctx.fillText(this.options.scaleLabel.labelString, 0, 0);
this.ctx.restore();
}
}
}
}