Go GUI---lxn/walk 自带demo学习---13.listbox_ownerdrawing

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于 2021-08-25 11:27:01 发布 · 489 阅读

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CC 4.0 BY-SA版权

这个示例演示了一个自定义的列表框控件，用于高效显示大量日志条目。它实现了自增列表功能，每秒添加新的日志项，并自动滚动到最新条目。通过优化布局和测量策略，提高了滚动性能和显示效率。

这个demo是干什么的呢？？？将近三百行。一个自定义的自增的列表框？

listbox_ownerdrawing.go

// Copyright 2019 The Walk Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

import (
	"fmt"
	"log"
	"strings"
	"time"

	"github.com/lxn/walk"
	. "github.com/lxn/walk/declarative"
	"github.com/lxn/win"
)

func main() {
	var mw *walk.MainWindow
	var lb *walk.ListBox
	var items []logEntry
	for i := 10000; i > 0; i-- {
		items = append(items, logEntry{time.Now().Add(-time.Second * time.Duration(i)), fmt.Sprintf("Some stuff just happend. %s", strings.TrimSpace(strings.Repeat("blah ", i%100)))})
	}
	model := &logModel{items: items}
	styler := &Styler{
		lb:                  &lb,
		model:               model,
		dpi2StampSize:       ma