如何在 GtkTreeView 中交替亮/暗行?
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【中文标题】如何在 GtkTreeView 中交替亮/暗行?【英文标题】:How to alternate light/dark rows in GtkTreeView? 【发布时间】:2016-06-30 08:41:57 【问题描述】:我已阅读并尝试了此问题的现有解决方案,但我无法让它们发挥作用。我希望有人能指出我做错了什么,或者告诉我为什么这些解决方案不再起作用。
https://thegnomejournal.wordpress.com/2011/03/15/styling-gtk-with-css/(5岁) Widgets to list files with gtk(2岁) How do you change alternating background row colors of a gtk.TreeView in pygtk?(4岁) https://askubuntu.com/questions/285559/how-to-reenable-alternating-grey-lines-in-nautilus-files-3-6-list-view(3岁)我想确保这些解决方案不起作用,所以我制作了这样的样式表:
GtkTreeView row
color: #FFFFFF;
background-color: #FF0000;
GtkTreeView row:nth-child(even)
background-color: #FF00FF;
GtkTreeView row:nth-child(odd)
background-color: #00FFFF;
用花哨的颜色,只是为了使行颜色的差异非常明显。然后,我做了一个小应用程序来加载树视图:
#include <gtk/gtk.h>
int main(int argc, char *argv[])
int i;
gtk_init(&argc,&argv);
//GtkBuilder* b = gtk_builder_new_from_file("derp.glade.xml");
GtkWidget* top = gtk_window_new(GTK_WINDOW_TOPLEVEL);
GtkListStore* items = gtk_list_store_new(2,
G_TYPE_STRING,
G_TYPE_STRING);
GtkWidget* view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(items));
gtk_tree_view_insert_column_with_attributes
(GTK_TREE_VIEW(view),
0,
"Herp",
gtk_cell_renderer_text_new(),
"text",0,
NULL);
gtk_tree_view_insert_column_with_attributes
(GTK_TREE_VIEW(view),
1,
"Derp",
gtk_cell_renderer_text_new(),
"text",1,
NULL);
gtk_container_add(GTK_CONTAINER(top),view);
GtkCssProvider* prov = gtk_css_provider_new();
gtk_css_provider_load_from_path
(prov,
"derp.css",
NULL);
gtk_style_context_add_provider
(gtk_widget_get_style_context(view),
GTK_STYLE_PROVIDER(prov),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
GtkTreeIter iter;
gtk_tree_model_get_iter_first(GTK_TREE_MODEL(items),&iter);
for(i=0;i<3;++i)
gtk_list_store_insert_with_values
(items,&iter,0,
0, "Row",
1, "Row",
-1);
gtk_widget_show_all(top);
gtk_main();
return 0;
编译:
gcc -o test teststyle.c `pkg-config gtk+-3.0 --cflags --libs`
当我运行应用程序时,三行显示为 #00FFFF 作为背景颜色。他们不交替。它们只采用“row:nth-child(odd)”部分的颜色,甚至偶数行也采用该颜色。弄乱 css 文件也可以做一些有趣的事情。例如切换奇偶数:
GtkTreeView row
color: #FFFFFF;
background-color: #FF0000;
GtkTreeView row:nth-child(odd)
background-color: #FF00FF;
GtkTreeView row:nth-child(even)
background-color: #00FFFF;
现在所有行都显示为#FF00FF,没有交替。我认为 GTK 完全无法以某种方式读取伪类,不小心将“GtkTreeView row:nth-child(odd)”变成了“GtkTreeView row”,并且完全错过了“nth-child(even)”选择器。如果我删除奇数选择器并且只有偶数:
GtkTreeView row
color: #FFFFFF;
background-color: #FF0000;
GtkTreeView row:nth-child(even)
background-color: #FF00FF;
现在它的背景颜色为#FF0000,所以它完全忽略(偶数)规则。
我尝试在树视图上设置规则提示,但它没有做任何事情,除了抱怨设置规则提示已被弃用。我在基本的 Arch 系统上使用 GTK 3.18.9,XFCE 作为窗口管理器。我在这里做错什么了吗?还是我的 GTK 版本搞砸了,不知何故?
【问题讨论】:
【参考方案1】:这可能是一个错误。在this examplerow:nth-child
被应用到不同的GtkTreeView。
【讨论】:
【参考方案2】:我认为只有 2 个方块就足够了
GtkTreeView row:nth-child(odd)
background-color: #FF00FF;
GtkTreeView row:nth-child(even)
background-color: #00FFFF;
下面是python中的一个例子,回答前测试没问题
#!/usr/bin/env python3
# -*- coding: ISO-8859-1 -*-
import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
from gi.repository import Gdk
window = Gtk.Window()
window.connect("destroy", lambda q: Gtk.main_quit())
liststore = Gtk.ListStore(str, int)
liststore.append(["Oranges", 5])
liststore.append(["Apples", 3])
liststore.append(["Bananas", 1])
liststore.append(["Tomatoes", 4])
liststore.append(["Cucumber", 1])
liststore.append(["potatoes", 10])
liststore.append(["apricot", 100])
treeview = Gtk.TreeView(model=liststore)
treeview.set_rules_hint( True )
window.add(treeview)
treeviewcolumn = Gtk.TreeViewColumn("Item")
treeview.append_column(treeviewcolumn)
cellrenderertext = Gtk.CellRendererText()
treeviewcolumn.pack_start(cellrenderertext, True)
treeviewcolumn.add_attribute(cellrenderertext, "text", 0)
treeviewcolumn = Gtk.TreeViewColumn("Quantity")
treeview.append_column(treeviewcolumn)
cellrenderertext = Gtk.CellRendererText()
treeviewcolumn.pack_start(cellrenderertext, True)
treeviewcolumn.add_attribute(cellrenderertext, "text", 1)
css_provider = Gtk.CssProvider()
css = """
/* font operate on entire GtkTreeView not for selected row */
GtkTreeView font-weight: bold;font: Sans 20;font-style: italic;
GtkTreeView row:nth-child(even)
background-image: -gtk-gradient (linear,
left top,
left bottom,
from (#d0e4f7),
color-stop (0.5, darker (#d0e4f7)),
to (#fdffff));
GtkTreeView row:nth-child(odd)
background-image: -gtk-gradient (linear,
left top,
left bottom,
from (yellow),
color-stop (0.5, darker (yellow)),
to (#fdffff));
/* next line only border action operate */
GtkTreeView:selectedcolor: white; background: green; border-width: 1px; border-color: black;
/* next line for Gtk.TreeViewColumn */
column-header .buttoncolor: white; background: purple;
"""
css_provider.load_from_data(css)
screen = Gdk.Screen.get_default()
style_context = window.get_style_context()
style_context.add_provider_for_screen(screen, css_provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION)
window.show_all()
Gtk.main()
【讨论】:
代码示例不起作用“回溯(最近一次调用最后):文件“zebragtk.py”,第 58 行,在gcc -o derpp `pkg-config --cflags --libs gtk+-3.0` derp.c
编译,它仍然忽略了 (even)
选择器。我有 GTK 3.18.9。不知道为什么 python 不能工作,但我怀疑严重分层的抽象接口是罪魁祸首。
在 GTK# 项目中对我来说也是如此。这些行不与上述 CSS 代码交替。以上是关于如何在 GtkTreeView 中交替亮/暗行?的主要内容,如果未能解决你的问题,请参考以下文章