feat: add axis draw function

util.go

@@ -0,0 +1,81 @@
+// MIT License
+
+// Copyright (c) 2022 Tree Xie
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package charts
+
+import "github.com/wcharczuk/go-chart/v2"
+
+func getDefaultInt(value, defaultValue int) int {
+	if value == 0 {
+		return defaultValue
+	}
+	return value
+}
+
+func autoDivide(max, size int) []int {
+	unit := max / size
+
+	rest := max - unit*size
+	values := make([]int, size+1)
+	value := 0
+	for i := 0; i < size; i++ {
+		values[i] = value
+		if i < rest {
+			value++
+		}
+		value += unit
+	}
+	values[size] = max
+	return values
+}
+func maxInt(values ...int) int {
+	result := 0
+	for _, v := range values {
+		if v > result {
+			result = v
+		}
+	}
+	return result
+}
+
+func measureTextMaxWidthHeight(textList []string, r chart.Renderer) (int, int) {
+	maxWidth := 0
+	maxHeight := 0
+	for _, text := range textList {
+		box := r.MeasureText(text)
+		maxWidth = maxInt(maxWidth, box.Width())
+		maxHeight = maxInt(maxHeight, box.Height())
+	}
+	return maxWidth, maxHeight
+}
+
+func reverseStringSlice(stringList []string) {
+	for i, j := 0, len(stringList)-1; i < j; i, j = i+1, j-1 {
+		stringList[i], stringList[j] = stringList[j], stringList[i]
+	}
+}
+
+func reverseIntSlice(intList []int) {
+	for i, j := 0, len(intList)-1; i < j; i, j = i+1, j-1 {
+		intList[i], intList[j] = intList[j], intList[i]
+	}
+}