button

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按钮就是可以点击的东西。事件处理程序可以用来捕获鼠标、键盘和其他事件。它通常呈现为一个灰色开始长方形。您可以指定按钮的label 属性来将按钮的文字设置好，或者直接写在标签中间也行。

更多信息请参阅 XUL tutorial.

Attributes: accesskey, autocheck, checkState, checked, command, crop, dir, disabled, dlgtype, group, icon, image, label, open, orient, tabindex, type

Properties: accessKey, accessibleType, autoCheck, checkState, checked, command, crop, dir, disabled, dlgType, group, image, label, open, orient, tabIndex, type

Examples

<button label="Press Me"
        oncommand="alert('You pressed me!');"/>

Attributes

accesskey: Type: character; This should be set to a letter that is used as a shortcut key. This letter should be one of the characters that appears in the label text for the element.

Example

<vbox>	
  <label value="Enter Name" accesskey="e" control="myName"/>
  <textbox id="myName"/>
  <button label="Cancel" accesskey="n"/>
  <button label="Ok" accesskey="O"/>
</vbox>

checkState: Type: integer, values 0, 1, or 2; This attribute may be used to create three state buttons, numbered 0, 1 and 2. When in state 0 or 1, pressing the button will switch to the opposite state. When in state 2, pressing the button will switch to state 0. This means that the button acts like a checkbox except that there is a third state which must be set manually by adjusting the check state. If you wish to have different behavior for how the states are adjusted, set the autoCheck attribute to false and adjust the state with a script. The type attribute must be set to checkbox for buttons with a check state. Constants for the possible values for this attribute are in the nsIDOMXULButtonElement interface.

checked: Type: boolean; Indicates whether the element is checked or not.; Use hasAttribute() to determine whether this attribute is set instead of getAttribute().; For buttons, the type attribute must be set to checkbox or radio for this attribute to have any effect.<magic name="\"PAGENAME\"/"></magic>

command: Type: element id; Set to the id of a command element that is being observed by the element.

crop: Type: one of the values below; If the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute. An ellipsis will be used in place of the cropped text. If the box direction is reversed, the cropping is reversed.

start: The text will be cropped on its left side.
end: The text will be cropped on its right side.
left: The text will be cropped on its left side.
right: The text will be cropped on its right side.
center: The text will be cropped in the middle, showing both the start and end of the text normally.
none: The text will be not be cropped using an ellipsis. However, the text will simply be cut off if it is too large. The side depends on the CSS text alignment.

dir: Type: one of the values below; The direction in which the child elements of the element are placed.

normal: For scales, the scale's values are ordered from left to right (for horizontal scales) or from top to bottom (for vertical scales) For other elements, the elements are placed left to right or top to bottom in the order they appear in the XUL code
reverse: For scales, the scale's values are ordered from right to left (for horizontal scales) or from bottom to top (for vertical scales). For other elements, they are placed right to left or bottom to top. This is reverse of the order in which they appear in the XUL code.

disabled: Type: boolean; Indicates whether the element is disabled or not. If this element is set to true the element is disabled. Disabled elements are usually drawn with grayed-out text. If the element is disabled, it does not respond to user actions, it cannot be focused, and the command event will not fire.

<!-- Checkbox enables/disables the button -->
<checkbox label="Enable button" 
    onclick="document.getElementById('buttRemove').disabled = this.checked"/>
<button id="buttRemove" label="Remove All" disabled="true"/>

dlgtype

Type: one of the values below

The dialog type of the button, used only when the button is in a dialog box. You can use this feature to replace the standard dialog box buttons with custom buttons, yet the dialog event methods will still function. For example, if the dlgType is set to accept, the button will replace the dialog box's accept button, which is usually labeled OK. Using this attribute on a button that is not in a dialog box has no effect. The following values can be used as the dialog type:

accept: The OK button, which will accept the changes when pressed.
cancel: The cancel button which will cancel the operation.
help: A help button for displaying help about the dialog.
disclosure: A button to show more information. This might be a button or a disclosure triangle.
extra1: An optional additional button.
extra2: A second optional additional button.

group: Type: string group name; Buttons with type="radio" and the same value for their group attribute are put into the same group. Only one button from each group can be checked at a time. If the user selects one the buttons, the others in the group are unchecked.

icon: Mozilla 1.8; Type: string; This attribute should be used to set the usage for common buttons. Some platforms display these buttons with a small icon indicating their usage. This should be used in place of the image attribute. Possible values include: accept, cancel, help, open, save, find, clear, yes, no, apply, close, print, add, remove, refresh, go-forward, go-back, properties, select-font, select-color, network. If you are using a button that matches one of these common usages, use the icon attribute to indicate this. See the appearance of the different icons on some available platforms.

image: Type: image URL; The URL of the image to appear on the element. If this attribute is empty or left out, no image appears. The position of the image is determined by the dir and orient attributes.

label: Type: string; The label that will appear on the element. If this is left out, no text appears.
label 在元素上显示。如果左侧出界，则不显示任何文字。

open: Type: boolean; For the menu type buttons, the open attribute is set to true when the menu is open. The open attribute is not present if the menu is closed.

布局(orient)

值类型：可以是下面值中的一种。
指定了子控件的布局(orient)为水平分布的(horizontally)或者是垂直分布的(vertically)。默认值依赖于控件本身。你也可以使用-moz-box-orient中的样式属性。

horizontally: 子控件会被按照在xul源文件中出现的位置依次布置在一行中。
vertically: 子控件会被按照在xul源文件中出现的位置依次布置在一列中。

tabindex: Type: integer; The tab order of the element. The tab order is the order in which the focus is moved when the user presses the "tab" key. Elements with a higher tabindex are later in the tab sequence.

type

Type: one of the values below

The type of button. If this attribute is not present, a normal button is created. Leave the attribute out for a normal button.

checkbox: This type of button can be in two states. The user can click the button to switch between the states. This is not the same as a checkbox because it looks like a button.
menu: Set the type attribute to the value menu to create a button with a menu popup. Place a menupopup element inside the button in this case. The user may click anywhere on the button to open and close the menu.
menu-button: You can also use the value menu-button to create a button with a menu. Unlike the menu type, this type requires the user to press the arrow to open the menu, but a different command may be invoked when the main part of the button is pressed.
panel: Similar to the menu type, this opens a popup. Place a panel element inside the button. panel elements are popups that support any type of content.
radio: The button acts like a radio button. Only one button in the group can be on a once.
repeat: This button will fire its command event repeatedly while the mouse button is held down.

Properties

accessKey: Type: character; Gets and sets the value of the accesskey attribute.

accessibleType: Type: integer; A value indicating the type of accessibility object for the element.

autoCheck: Type: boolean; Gets and sets the value of the autoCheck attribute.

checkState: Type: integer, values 0, 1, or 2; Gets and sets the value of the checkState attribute.

checked: Type: boolean; Gets and sets the value of the checked attribute.

command: Type: element id; Gets and sets the value of the command attribute.

crop: Type: string; Gets and sets the value of the crop attribute.

dir: Type: string; Gets and sets the value of the dir attribute.

disabled: Type: boolean; Gets and sets the value of the disabled attribute.

dlgType: Type: string; Gets and sets the value of the dlgType attribute.

group: Type: string group name; Gets and sets the value of the group attribute.

image: Type: image URL; Gets and sets the value of the image attribute.

label: Type: string; Gets and sets the value of the label attribute.

open: Type: boolean; Gets and sets the value of the open attribute.

orient: Type: string; Gets and sets the value of the orient attribute.

tabIndex: Type: integer; Gets and sets the value of the tabindex attribute.

type: Type: string; Gets and sets the value of the type attribute.

Methods

Inherited from XUL element
blur, click, doCommand, focus, getElementsByAttribute

Inherited from DOM element
addEventListener(), appendChild(), dispatchEvent(), getAttribute(), getAttributeNode(), getAttributeNodeNS(), getAttributeNS(), getElementsByTagName(), getElementsByTagNameNS(), hasAttribute(), hasAttributeNS(), hasAttributes(), hasChildNodes(), insertBefore(), isSupported(), normalize(), removeAttribute(), removeAttributeNode(), removeAttributeNS(), removeChild(), removeEventListener(), replaceChild(), setAttribute(), setAttributeNode(), setAttributeNodeNS(), setAttributeNS()

Interfaces: nsIAccessibleProvider, nsIDOMXULButtonElement

button

Examples

Attributes

Example

See also

Properties

Methods

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button

Examples

Attributes

Example

See also

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