go-gtk3开发之图片控件
案例说明
添加图片控件,并设置图片。
demo.go
package main
import (
"fmt"
"github.com/gotk3/gotk3/glib"
"github.com/gotk3/gotk3/gtk"
"log"
"os"
)
func main() {
const appId = "com.nayoso.example"
app, _ := gtk.ApplicationNew(appId, glib.APPLICATION_FLAGS_NONE)
_, err := app.Connect("activate", func() {
createWindow(app)
})
if err != nil {
log.Fatal(err)
}
app.Run(os.Args)
}
func createWindow(application *gtk.Application) {
// 从文件中创建Builder
builder, err := gtk.BuilderNewFromFile("7_图片控件/builder.ui")
if err != nil {
log.Fatal(err)
}
// 获取window窗口
winObj, _ := builder.GetObject("window1")
window := winObj.(*gtk.Window)
application.AddWindow(window)
// window 窗口设置
window.SetSizeRequest(300, 240) //设置窗口大小
window.SetTitle("hello go") //设置标题
window.SetResizable(false) //设置不可伸缩
window.SetPosition(gtk.WIN_POS_CENTER) //设置居中显示
err = window.SetIconFromFile("images/app.ico") //设置icon
if err != nil {
log.Fatal(err)
}
//获取image控件
imageObj, err := builder.GetObject("image1")
if err != nil {
log.Fatal(err)
}
image1 := imageObj.(*gtk.Image)
//获取image控件大小
w, h := image1.GetSizeRequest()
fmt.Println(w, h)
// 设置图片
image1.SetFromFile("./images/app.ico")
// 显示所有界面
window.ShowAll()
}
builder.ui
<?xml version="1.0" encoding="UTF-8"?>
<interface>
<requires lib="gtk+" version="2.24"/>
<!-- interface-naming-policy project-wide -->
<object class="GtkWindow" id="window1">
<property name="can_focus">False</property>
<child>
<object class="GtkFixed" id="fixed1">
<property name="visible">True</property>
<property name="can_focus">False</property>
<child>
<object class="GtkImage" id="image1">
<property name="width_request">100</property>
<property name="height_request">80</property>
<property name="visible">True</property>
<property name="can_focus">False</property>
<property name="stock">gtk-missing-image</property>
</object>
<packing>
<property name="x">148</property>
<property name="y">114</property>
</packing>
</child>
</object>
</child>
</object>
</interface>