plasma-framework/declarativeimports/plasmacomponents/qml/Button.qml

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/*
* Copyright (C) 2011 by Daker Fernandes Pinheiro <dakerfp@gmail.com>
* Copyright (C) 2011 by Mark Gaiser <markg85@gmail.com>
* Copyright (C) 2011 by Marco Martin <mart@kde.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
import QtQuick 1.0
import org.kde.plasma.core 0.1 as PlasmaCore
Item {
id: button
// Commmon API
property bool checked: false
property bool checkable: false
property alias pressed: mouse.pressed
property alias text: label.text
property alias iconSource: icon.source
property alias font: label.font
signal clicked()
width: Math.max(50, icon.width + label.paintedWidth + surfaceNormal.margins.left + surfaceNormal.margins.right) + ((icon.valid) ? surfaceNormal.margins.left : 0);
height: Math.max(20, Math.max(icon.height, label.paintedHeight) + surfaceNormal.margins.top + surfaceNormal.margins.bottom)
// TODO: needs to define if there will be specific graphics for
// disabled buttons
opacity: enabled ? 1.0 : 0.5
QtObject {
id: internal
property bool userPressed: false
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function belongsToButtonGroup()
{
return button.parent
&& button.parent.hasOwnProperty("checkedButton")
&& button.parent.exclusive
}
function pressButton()
{
userPressed = true
}
function releaseButton()
{
userPressed = false
if (!button.enabled) {
return
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}
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if ((!belongsToButtonGroup() || !button.checked) && button.checkable) {
button.checked = !button.checked
}
button.clicked()
button.forceActiveFocus()
}
}
Keys.onSpacePressed: internal.pressButton()
Keys.onReturnPressed: internal.pressButton()
Keys.onReleased: {
if (event.key == Qt.Key_Space ||
event.key == Qt.Key_Return)
internal.releaseButton();
}
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ButtonShadow {
id: shadow
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anchors.fill: parent
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state: {
if (internal.userPressed || checked) {
return "hidden"
} else if (mouse.containsMouse) {
return "hover"
} else if (button.activeFocus) {
return "focus"
} else {
return "shadow"
}
}
}
// The normal button state
PlasmaCore.FrameSvgItem {
id: surfaceNormal
anchors.fill: parent
imagePath: "widgets/button"
prefix: "normal"
}
// The pressed state
PlasmaCore.FrameSvgItem {
id: surfacePressed
anchors.fill: parent
imagePath: "widgets/button"
prefix: "pressed"
opacity: 0
}
Item {
id: buttonContent
state: (internal.userPressed || checked) ? "pressed" : "normal"
states: [
State { name: "normal" },
State { name: "pressed" }
]
transitions: [
Transition {
to: "normal"
// Cross fade from pressed to normal
ParallelAnimation {
NumberAnimation { target: surfaceNormal; property: "opacity"; to: 1; duration: 100 }
NumberAnimation { target: surfacePressed; property: "opacity"; to: 0; duration: 100 }
}
},
Transition {
to: "pressed"
// Cross fade from normal to pressed
ParallelAnimation {
NumberAnimation { target: surfaceNormal; property: "opacity"; to: 0; duration: 100 }
NumberAnimation { target: surfacePressed; property: "opacity"; to: 1; duration: 100 }
}
}
]
anchors {
fill: parent
leftMargin: surfaceNormal.margins.left
topMargin: surfaceNormal.margins.top
rightMargin: surfaceNormal.margins.right
bottomMargin: surfaceNormal.margins.bottom
}
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IconLoader {
id: icon
anchors {
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verticalCenter: parent.verticalCenter
left: label.text ? parent.left : undefined
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horizontalCenter: label.text ? undefined : parent.horizontalCenter
}
}
Text {
id: label
anchors {
top: parent.top
bottom: parent.bottom
right: parent.right
left: icon.valid ? icon.right : parent.left
leftMargin: icon.valid ? parent.anchors.leftMargin : 0
}
font.capitalization: theme.defaultFont.capitalization
font.family: theme.defaultFont.family
font.italic: theme.defaultFont.italic
font.letterSpacing: theme.defaultFont.letterSpacing
font.pointSize: theme.defaultFont.pointSize
font.strikeout: theme.defaultFont.strikeout
font.underline: theme.defaultFont.underline
font.weight: theme.defaultFont.weight
font.wordSpacing: theme.defaultFont.wordSpacing
color: theme.buttonTextColor
horizontalAlignment: Text.AlignHCenter
verticalAlignment: Text.AlignVCenter
}
}
MouseArea {
id: mouse
anchors.fill: parent
hoverEnabled: true
onPressed: internal.pressButton()
onReleased: internal.releaseButton()
}
}