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//! Manage how elements should be drawn
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2
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3
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//! All style structs follows the 'optional builder' pattern:
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4
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//! Each field is a `Option` which start as `None`.
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5
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//! They can all be set with setter methods, and instances
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6
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//! can be overlaid with another one to set many at once.
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//! Settings will be cloned in and out of it.
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9
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/// The style that line corners should use
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10
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#[derive(Debug, Clone, Copy)]
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pub enum LineJoin {
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12
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Miter,
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Round,
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}
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15
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#[derive(Debug, Default, Clone)]
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pub struct LineStyle {
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pub colour: Option<String>,
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pub width: Option<f32>,
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pub linejoin: Option<LineJoin>,
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}
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impl LineStyle {
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2
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pub fn new() -> Self {
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LineStyle {
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colour: None,
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width: None,
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linejoin: None,
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}
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}
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2
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pub fn overlay(&mut self, other: &Self) {
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32
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2
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if let Some(ref v) = other.colour {
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33
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self.colour = Some(v.clone())
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}
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35
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2
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if let Some(ref v) = other.width {
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2
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self.width = Some(*v)
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}
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2
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if let Some(ref v) = other.linejoin {
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self.linejoin = Some(*v)
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}
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}
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2
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pub fn colour<T>(mut self, value: T) -> Self
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where
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T: Into<String>,
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{
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self.colour = Some(value.into());
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self
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}
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2
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pub fn get_colour(&self) -> String {
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self.colour.clone().unwrap_or_else(|| "black".into())
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}
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2
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pub fn width<T>(mut self, value: T) -> Self
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where
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T: Into<f32>,
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{
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self.width = Some(value.into());
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2
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self
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}
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2
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pub fn get_width(&self) -> f32 {
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2
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self.width.unwrap_or_else(|| 2.0)
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}
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2
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pub fn linejoin<T>(mut self, value: T) -> Self
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where
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T: Into<LineJoin>,
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{
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2
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self.linejoin = Some(value.into());
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2
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self
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}
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2
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pub fn get_linejoin(&self) -> LineJoin {
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2
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self.linejoin.unwrap_or_else(|| LineJoin::Round)
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}
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}
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77
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78
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/// The marker that should be used for the points of the scatter plot
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79
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#[derive(Debug, Clone, Copy)]
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80
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pub enum PointMarker {
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81
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Circle,
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82
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Square,
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83
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Cross,
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84
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}
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85
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86
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#[derive(Debug, Default, Clone)]
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87
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pub struct PointStyle {
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88
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marker: Option<PointMarker>,
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89
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colour: Option<String>,
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90
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size: Option<f32>,
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}
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92
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impl PointStyle {
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93
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2
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pub fn new() -> Self {
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94
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PointStyle {
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95
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marker: None,
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96
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colour: None,
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97
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size: None,
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}
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}
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100
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101
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0
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pub fn overlay(&mut self, other: &Self) {
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102
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0
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if let Some(ref v) = other.marker {
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103
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0
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self.marker = Some(*v)
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104
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}
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105
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106
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0
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if let Some(ref v) = other.colour {
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107
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0
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self.colour = Some(v.clone())
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108
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}
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109
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110
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0
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if let Some(v) = other.size {
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111
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0
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self.size = Some(v)
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112
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}
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113
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}
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114
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2
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pub fn marker<T>(mut self, value: T) -> Self
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115
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where
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116
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T: Into<PointMarker>,
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117
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{
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118
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2
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self.marker = Some(value.into());
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119
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2
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self
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120
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}
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121
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2
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pub fn get_marker(&self) -> PointMarker {
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122
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2
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self.marker.unwrap_or(PointMarker::Circle)
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123
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}
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124
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125
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2
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pub fn colour<T>(mut self, value: T) -> Self
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126
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where
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127
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T: Into<String>,
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128
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{
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129
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2
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self.colour = Some(value.into());
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130
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2
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self
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131
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}
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132
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2
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pub fn get_colour(&self) -> String {
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133
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2
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self.colour.clone().unwrap_or_else(|| "".into())
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134
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}
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135
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136
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pub fn size<T>(mut self, value: T) -> Self
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137
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where
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138
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T: Into<f32>,
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139
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{
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140
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0
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self.size = Some(value.into());
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141
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0
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self
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142
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}
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143
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2
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pub fn get_size(&self) -> f32 {
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144
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2
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self.size.unwrap_or(5.0)
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145
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}
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146
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}
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147
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148
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#[derive(Debug, Default)]
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149
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pub struct BoxStyle {
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150
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fill: Option<String>,
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151
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}
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152
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impl BoxStyle {
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153
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2
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pub fn new() -> Self {
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154
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BoxStyle { fill: None }
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155
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}
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156
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157
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0
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pub fn overlay(&mut self, other: &Self) {
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158
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0
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if let Some(ref v) = other.fill {
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159
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0
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self.fill = Some(v.clone())
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160
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}
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161
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}
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162
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163
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pub fn fill<T>(mut self, value: T) -> Self
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164
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where
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165
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T: Into<String>,
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166
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{
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167
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0
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self.fill = Some(value.into());
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168
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0
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self
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169
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}
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170
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0
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pub fn get_fill(&self) -> String {
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171
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0
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self.fill.clone().unwrap_or_else(|| "".into())
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172
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}
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173
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}
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174
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175
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#[cfg(test)]
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176
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mod tests {
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177
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use super::*;
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178
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179
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#[test]
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180
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2
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fn test_linestyle_plain_overlay() {
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181
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2
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let mut p = LineStyle::new();
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182
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2
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p.overlay(
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183
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2
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&LineStyle::new()
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184
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.colour("red")
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185
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2
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.linejoin(LineJoin::Miter)
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186
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.width(1.),
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187
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);
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188
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2
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assert_eq!(p.get_colour(), "red".to_string());
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189
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2
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assert_eq!(p.get_width(), 1.);
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190
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2
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if let LineJoin::Miter = p.get_linejoin() {
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191
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} else {
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192
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0
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panic!()
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193
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}
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194
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}
|
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195
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}
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milliams