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1-events.tpl.go
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1-events.tpl.go
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//** This file was code generated by GoT. DO NOT EDIT. ***
package controls
import (
"context"
"io"
)
// DrawTemplate draws the content of the matching control's template file.
func (ctrl *EventsPanel) DrawTemplate(ctx context.Context, _w io.Writer) (err error) {
if _, err = io.WriteString(_w, `<h1>Events</h1>
<h2>Intro</h2>
<p>
You can assign <i>Events</i> to GoRADD controls to trigger <i>Actions</i> using the <i>On</i> function.
</p>
<p>
Consider the code below from the previous example:
<br>
<label>Textbox1</label>`); err != nil {
return
}
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
if `` == "" {
if _, err = io.WriteString(_w, ` `); err != nil {
return
}
ctrl.Page().GetControl("textBox1").Draw(ctx, _w)
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
} else {
if _, err = io.WriteString(_w, ` `); err != nil {
return
}
ctrl.Page().GetControl("textBox1").ProcessAttributeString(``).Draw(ctx, _w)
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
}
if _, err = io.WriteString(_w, `<br>
<code>
textBox := NewTextbox(p, "textField")
textBox.On(event.Input().Delay(1000).Action(action.Message(javascript.JsCode("event.target.value"))))
</code>
<br>
<p>
This code creates a <i>Textbox</i> control, and then tells it to respond to javascript <i>input</i> events.
The response from the event is a javascript action that will display a message on the screen, using the value of
the Textbox as the text of the message. The <i>On</i> function attaches the event and action to the control.
</p>
<h2>Default Events</h2>
<p>
While the <i>On()</i> function can associate any event with an action, most controls have default event functions
for the events that are typically assigned to that control. For example:
<br>
`); err != nil {
return
}
if `` == "" {
if _, err = io.WriteString(_w, ` `); err != nil {
return
}
ctrl.Page().GetControl("btn1").Draw(ctx, _w)
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
} else {
if _, err = io.WriteString(_w, ` `); err != nil {
return
}
ctrl.Page().GetControl("btn1").ProcessAttributeString(``).Draw(ctx, _w)
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
}
if _, err = io.WriteString(_w, `<br>
<code>
btn1 := NewButton(p, "btn1")
btn1.OnClick(action.Message("btn1 clicked"))
</code>
<br>
This code creates a button and tells it to display a message when the button is clicked. It is equivalent to:
</p>
<code>
btn := NewButton(p, "btn1")
btn.On(event.Click().Action(action.Message("btn1 clicked")))
</code>
<h2>Predefined Events</h2>
<p>
GoRADD includes shortcuts for common javascript events. Typical shortcuts include:
</p>
<ul>
<li>event.Focus()
<li>event.Blur()
<li>event.Change()
<li>event.Input()
<li>event.KeyDown()
<li>event.KeyUp()
<li>event.DragDrop()
</ul>
<p>
There are also some KeyDown events that have their own shortcuts:
</p>
<ul>
<li>event.BackspaceKey()
<li>event.EnterKey()
<li>event.EscapeKey()
<li>event.TabKey()
<li>event.UpArrowKey()
<li>event.DownArrowKey()
</ul>
</p>
<p>
All the predefined events are listed in the <a href="https://pkg.go.dev/github.com/goradd/goradd/pkg/page/event">Event Documentation</a>.
</p>
<h2>Custom Events</h2>
You can create an event trigger for any javascript
event using event.NewEvent(). The textbox below shows a message when text is selected and cut. (command-X or ctrl-x).
<br>
<label>Textbox2</label>`); err != nil {
return
}
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
if `` == "" {
if _, err = io.WriteString(_w, ` `); err != nil {
return
}
ctrl.Page().GetControl("textBox2").Draw(ctx, _w)
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
} else {
if _, err = io.WriteString(_w, ` `); err != nil {
return
}
ctrl.Page().GetControl("textBox2").ProcessAttributeString(``).Draw(ctx, _w)
if _, err = io.WriteString(_w, `
`); err != nil {
return
}
}
if _, err = io.WriteString(_w, `<code>
textBox2 := NewTextbox(p, "textBox2")
textBox2.SetText("Cut Me")
textBox2.On(event.NewEvent("cut").Action(action.Message("textbox2 cut")))
</code>
</p>
<p>
</p>
`); err != nil {
return
}
return
}