a158191faf
In some cases the XAxis may have a single long title. This can result in very few increments being shown. In order to be more flexible for those cases this allows the XAxis Tick frequency to be able to be directly controlled.
108 lines
3.4 KiB
Go
108 lines
3.4 KiB
Go
// MIT License
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// Copyright (c) 2022 Tree Xie
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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package charts
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import (
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"github.com/golang/freetype/truetype"
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)
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type XAxisOption struct {
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// The font of x axis
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Font *truetype.Font
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// The boundary gap on both sides of a coordinate axis.
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// Nil or *true means the center part of two axis ticks
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BoundaryGap *bool
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// The data value of x axis
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Data []string
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// The theme of chart
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Theme ColorPalette
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// The font size of x axis label
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FontSize float64
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// The flag for show axis, set this to *false will hide axis
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Show *bool
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// Number of segments that the axis is split into. Note that this number serves only as a recommendation to avoid writing overlap.
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SplitNumber int
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// The position of axis, it can be 'top' or 'bottom'
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Position string
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// The line color of axis
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StrokeColor Color
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// The color of label
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FontColor Color
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// The text rotation of label
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TextRotation float64
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// The first axis
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FirstAxis int
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// The offset of label
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LabelOffset Box
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isValueAxis bool
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// This value overrides SplitNumber, specifying directly the frequency at which the axis is split into, higher numbers result in less ticks
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Unit int
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}
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const defaultXAxisHeight = 30
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// NewXAxisOption returns a x axis option
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func NewXAxisOption(data []string, boundaryGap ...*bool) XAxisOption {
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opt := XAxisOption{
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Data: data,
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}
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if len(boundaryGap) != 0 {
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opt.BoundaryGap = boundaryGap[0]
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}
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return opt
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}
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func (opt *XAxisOption) ToAxisOption() AxisOption {
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position := PositionBottom
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if opt.Position == PositionTop {
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position = PositionTop
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}
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axisOpt := AxisOption{
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Theme: opt.Theme,
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Data: opt.Data,
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BoundaryGap: opt.BoundaryGap,
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Position: position,
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SplitNumber: opt.SplitNumber,
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StrokeColor: opt.StrokeColor,
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FontSize: opt.FontSize,
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Font: opt.Font,
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FontColor: opt.FontColor,
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Show: opt.Show,
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SplitLineColor: opt.Theme.GetAxisSplitLineColor(),
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TextRotation: opt.TextRotation,
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LabelOffset: opt.LabelOffset,
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FirstAxis: opt.FirstAxis,
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Unit: opt.Unit,
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}
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if opt.isValueAxis {
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axisOpt.SplitLineShow = true
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axisOpt.StrokeWidth = -1
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axisOpt.BoundaryGap = FalseFlag()
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}
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return axisOpt
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}
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// NewBottomXAxis returns a bottom x axis renderer
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func NewBottomXAxis(p *Painter, opt XAxisOption) *axisPainter {
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return NewAxisPainter(p, opt.ToAxisOption())
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}
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