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Diffstat (limited to 'src/controls/ComboBox.qml')
| -rw-r--r-- | src/controls/ComboBox.qml | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/src/controls/ComboBox.qml b/src/controls/ComboBox.qml new file mode 100644 index 00000000..aace7369 --- /dev/null +++ b/src/controls/ComboBox.qml @@ -0,0 +1,200 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the Qt Quick Controls module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names +** of its contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +import QtQuick 2.1 +import QtQuick.Controls 1.0 +import QtQuick.Controls.Private 1.0 +import "Styles/Settings.js" as Settings + +/*! + \qmltype ComboBox + \inqmlmodule QtQuick.Controls 1.0 + \ingroup controls + \brief ComboBox is a combined button and popup or drop-down list. + + Add items to the comboBox by assigning it a ListModel, or a list of strings to the \l model property. + + \qml + ComboBox { + width: 200 + model: [ "Banana", "Apple", "Coconut" ] + } + \endqml + + Example 2: + + \qml + ComboBox { + model: ListModel { + id: cbItems + ListElement { text: "Banana"; color: "Yellow" } + ListElement { text: "Apple"; color: "Green" } + ListElement { text: "Coconut"; color: "Brown" } + } + width: 200 + onCurrentIndexChanged: console.debug(currentText + ", " + cbItems.get(currentIndex).color) + } + \endqml +*/ + +Control { + id: comboBox + + /*! The model to populate the ComboBox from. */ + property alias model: popupItems.model + property string textRole: "" + + /*! The index of the currently selected item in the ComboBox. */ + property alias currentIndex: popup.__selectedIndex + /*! The text of the currently selected item in the ComboBox. */ + readonly property alias currentText: popup.selectedText + + /* \internal */ + readonly property bool __pressed: mouseArea.pressed && mouseArea.containsMouse || popup.__popupVisible + /* \internal */ + property alias __containsMouse: mouseArea.containsMouse + + style: Qt.createComponent(Settings.THEME_PATH + "/ComboBoxStyle.qml", comboBox) + + activeFocusOnTab: true + + Accessible.role: Accessible.ComboBox + + MouseArea { + id: mouseArea + anchors.fill: parent + hoverEnabled: true + onPressedChanged: if (pressed) popup.show() + } + + StyleItem { id: styleItem } + + Component.onCompleted: { + if (currentIndex === -1) + currentIndex = 0 + if (styleItem.style == "mac") { + popup.x -= 10 + popup.y += 4 + popup.__font.pointSize = 13 + } + + popup.ready = true + popup.resolveTextValue(textRole) + } + + onTextRoleChanged: popup.resolveTextValue(textRole) + + Menu { + id: popup + + style: isPopup ? __style.popupStyle : __style.dropDownStyle + + readonly property string selectedText: items[__selectedIndex] ? items[__selectedIndex].text : "" + property string textRole: "" + + property bool ready: false + property bool isPopup: comboBox.__panel.popup + + property int x: 0 + property int y: isPopup ? 0 : comboBox.height + __minimumWidth: comboBox.width + __visualItem: comboBox + + property ExclusiveGroup eg: ExclusiveGroup { id: eg } + + Instantiator { + id: popupItems + active: popup.ready + MenuItem { + text: popup.textRole === "" ? modelData : + (model[popup.textRole] || "") + checkable: true + exclusiveGroup: eg + } + onObjectAdded: popup.insertItem(index, object) + onObjectRemoved: popup.removeItem(object) + } + + function resolveTextValue(initialTextRole) { + if (!ready || !model) + return; + + var modelMayHaveRoles = model["get"] !== undefined + textRole = initialTextRole + if (textRole === "" && modelMayHaveRoles && model.get(0)) { + // No text role set, check whether model has a suitable role + // If 'text' is found, or there's only one role, pick that. + var listElement = model.get(0) + var roleName = "" + var roleCount = 0 + for (var role in listElement) { + if (role === "text") { + roleName = role + break + } else if (!roleName) { + roleName = role + } + ++roleCount + } + if (roleCount > 1 && roleName !== "text") { + console.warn("No suitable 'textRole' found for ComboBox.") + } else { + textRole = roleName + } + } + } + + function show() { + if (items[__selectedIndex]) + items[__selectedIndex].checked = true + __currentIndex = comboBox.currentIndex + __popup(x, y, isPopup ? __selectedIndex : 0) + } + } + + // The key bindings below will only be in use when popup is + // not visible. Otherwise, native popup key handling will take place: + Keys.onSpacePressed: { + if (!popup.popupVisible) + popup.show() + } + Keys.onUpPressed: { if (currentIndex > 0) currentIndex-- } + Keys.onDownPressed: { if (currentIndex < popupItems.count - 1) currentIndex++ } +} |