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Delegate 綾?br>
姒傚康
涓嶮VC妯″紡涓嶅悓錛宮odel/view緇撴瀯娌℃湁鐢ㄤ簬涓庣敤鎴蜂氦浜掔殑瀹屽叏鐙珛鐨勭粍浠躲備竴鑸潵璁詫紝 view璐熻矗鎶婃暟鎹睍紺?br>緇欑敤鎴鳳紝涔熷鐞嗙敤鎴風(fēng)殑杈撳叆銆備負(fù)浜?jiǎn)鑾峰緱鏇村鐨勭亯|фэ紝浜や簰閫氳繃delegagte鎵ц銆傚畠鏃㈡彁渚涜緭鍏ュ姛鑳藉張璐熻矗娓叉煋view涓殑姣忎釜鏁版嵁欏廣?鎺у埗delegates鐨勬爣鍑嗘帴鍙ｅ湪QAbstractItemDelegate綾諱腑瀹氫箟銆侱elegates閫氳繃瀹炵幇paint()鍜?span style="COLOR: #ff00ff">sizeHint()浠ヨ揪鍒版覆鏌撳唴瀹圭殑鐩殑銆傜劧鑰岋紝綆鍗曠殑鍩轟簬widget鐨刣elegates,鍙互浠?span style="COLOR: #0000ff">QItemDelegate瀛愮被鍖栵紝鑰屼笉鏄?span style="COLOR: #0000ff">QAbstractItemDelegate,榪欐牱鍙互浣跨敤瀹冩彁渚涚殑涓婅堪鍑芥暟鐨勭己鐪佸疄鐜般俤elegate鍙互浣跨敤widget鏉ュ鐞嗙紪杈戣繃紼嬶紝涔熷彲浠ョ洿鎺ュ浜嬩歡榪涜澶勭悊銆?/p>
浣跨敤鐜版垚鐨刣elegate
Qt鎻愪緵鐨勬爣鍑唙iews閮戒嬌鐢?span style="COLOR: #0000ff">QItemDelegate鐨勫疄渚嬫潵鎻愪緵緙栬緫鍔熻兘銆傚畠浠ユ櫘閫氱殑椋庢牸鏉ヤ負(fù)姣忎釜鏍囧噯view娓叉煋鏁版嵁欏廣傝繖浜涙爣鍑嗙殑views鍖呮嫭錛?span style="COLOR: #0000ff">QListView,QTableView,QTreeView銆傛墍鏈夋爣鍑嗙殑瑙掕壊閮介氳繃鏍囧噯views鍖呭惈鐨勭己鐪乨elegate榪涜澶勭悊銆備竴涓獀iew浣跨敤鐨刣elegate鍙互鐢?span style="COLOR: #ff00ff">itemDelegate()鍑芥暟鍙栧緱,鑰?span style="COLOR: #ff00ff">setItemDelegate() 鍑芥暟鍙互瀹夎涓涓畾鍒禿elegate銆?/p>
涓涓畝鍗曠殑delegate
榪欎釜delegate浣跨敤QSpinBox鏉ユ彁渚涚紪杈戝姛鑳姐傚畠涓昏鎯崇敤浜庢樉紺烘暣鏁扮殑models涓娿傚敖綆℃垜浠凡緇忓緩绔嬩簡(jiǎn)涓涓熀浜庢暣鏁扮殑table model,浣嗘垜浠篃鍙互浣跨敤QStandardItemModel錛屽洜涓篸elegate鍙互鎺у埗鏁版嵁鐨勫綍鍏ャ傛垜浠張寤轟簡(jiǎn)涓涓猼able view鏉ユ樉紺簃odel鐨勫唴瀹癸紝鐢ㄦ垜浠畾鍒剁殑delegate鏉ョ紪杈戙?br>
鎴戜滑浠?span style="COLOR: #0000ff">QItemDelegate瀛愮被鍖栵紝榪欐牱鍙互鍒╃敤瀹冪己鐪佸疄鐜扮殑鏄劇ず鍔熻兘銆傚綋鐒舵垜浠繀闇鎻愪緵鍑芥暟鏉ョ鐞嗙敤浜庣紪杈戠殑widget:
class SpinBoxDelegate : public QItemDelegate
{
Q_OBJECT
public:
SpinBoxDelegate(QObject *parent = 0);
QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
const QModelIndex &index) const;
void setEditorData(QWidget *editor, const QModelIndex &index) const;
void setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const;
void updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &index) const;
};
闇瑕佹敞鎰忕殑鏄?褰撲竴涓猟elegate鍒涘緩鏃訛紝涓嶉渶瑕佸畨瑁呬竴涓獁idget錛屽彧鏈夊湪鐪熸闇瑕佹椂鎵嶅垱寤鴻繖涓敤浜庣紪杈戠殑widget銆?br>
鎻愪緵緙栬緫鍣?/strong>
鍦ㄨ繖涓緥瀛愪腑錛屽綋table view闇瑕佹彁渚涗竴涓紪杈戝櫒鏃訛紝瀹冭姹俤elegate鎻愪緵涓涓彲鐢ㄤ簬緙栬緫鐨剋idget,瀹冨簲璇ラ傜敤浜庡綋鍓嶆琚慨鏀圭殑鏁版嵁欏廣傝繖姝ｆ槸createEditor()鍑芥暟搴旇瀹炵幇鐨勶細(xì)
QWidget *SpinBoxDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/* option */,
const QModelIndex &/* index */) const
{
QSpinBox *editor = new QSpinBox(parent);
editor->setMinimum(0);
editor->setMaximum(100);
return editor;
}
鎴戜滑涓嶉渶瑕佽窡韙繖涓獁idget鐨勬寚閽堬紝鍥犱負(fù)view浼?xì)鍦ㄤ笉闇瑕佹椂閿姣佽繖涓獁idget銆傛垜浠篃緇欑紪杈戝畨瑁呬簡(jiǎn)delegate緙虹渷鐨勪簨浠惰繃婊ゅ櫒錛岃繖鎻愪緵浜?jiǎn)鐢ㄦ堜h湡鏈涚殑鏍囧噯緙栬緫蹇嵎閿倂iew閫氳繃鎴戜滑瀹氫箟鐩稿簲鐨勫嚱鏁版潵淇濊瘉緙栬緫鍣ㄧ殑鏁版嵁涓庡嚑浣曞竷灞琚紜殑璁劇疆銆傛垜浠篃鍙互鏍規(guī)嵁涓嶅悓鐨刴odel index鏉ュ垱寤轟笉鍚岀殑緙栬緫鍣紝姣斿錛屾垜浠湁涓鍒楁暣鏁幫紝涓鍒楀瓧絎︿覆錛屾垜浠彲浠ユ牴鎹摢縐嶅垪琚紪杈戞潵鍒涘緩涓涓猀SpinBox鎴栨槸QLineEdit銆俤elegate蹇呴渶鎻愪緵涓涓嚱鏁版妸model涓殑鏁版嵁鎷瘋礉鍒扮紪杈戝櫒涓?br>void SpinBoxDelegate::setEditorData(QWidget *editor,
const QModelIndex &index) const
{
int value = index.model()->data(index, Qt::DisplayRole).toInt();
QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
spinBox->setValue(value);
}
鍚憁odel鎻愪氦鏁版嵁
榪欓渶瑕佹垜浠疄鐜板彟澶栦竴涓嚱鏁?span style="COLOR: #ff00ff">setModelData():
void SpinBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const
{
QSpinBox *spinBox = static_cast<QSpinBox*>(editor);
spinBox->interpretText();
int value = spinBox->value();
model->setData(index, value);
}
鏍囧噯鐨凲ItemDelegate綾誨綋瀹冨畬鎴愮紪杈戞椂浼?xì)鍙憺畡closeEditor()淇″彿鏉ラ氱煡view銆倂iew淇濊瘉緙栬緫鍣╳idget鍏抽棴涓庨攢姣併傛湰渚嬩腑鎴戜滑鍙彁渚涚畝鍗曠殑緙栬緫鍔熻兘錛屽洜姝や笉闇瑕佸彂閫佷釜淇″彿銆?/p>
鏇存柊緙栬緫鍣ㄥ嚑浣曞竷灞
delegate璐熻矗綆＄悊緙栬緫鍣ㄧ殑鍑犱綍甯冨眬銆傝繖浜涘嚑浣曞竷灞淇℃伅鍦ㄧ紪杈戝垱寤烘椂鎴杤iew鐨勫昂瀵鎬綅緗彂鐢熸敼鍙樻椂錛?br>閮藉簲褰撹鎻愪緵銆傚垢榪愮殑鏄紝view閫氳繃涓涓獀iew option鍙互鎻愪緵榪欎簺蹇呰鐨勪俊鎭?br> void SpinBoxDelegate::updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
editor->setGeometry(option.rect);
}
緙栬緫鎻愮ず
緙栬緫瀹屾垚鍚庯紝delegate浼?xì)缁欏埆鐨劸l勪歡鎻愪緵鏈夊叧浜庣紪杈戝鐞嗙粨鏋滅殑鎻愮ず錛屼篃鎻愪緵鐢ㄤ簬鍚庣畫(huà)緙栬緫鎿嶄綔鐨勪竴浜涙彁紺恒?br>榪欏彲浠ラ氳繃鍙戝皠甯︽湁鏌愮hint鐨?span style="COLOR: #ff00ff">closeEditor()淇″彿瀹屾垚銆傝繖浜涗俊鍙蜂細(xì)琚畨瑁呭湪spin box涓婄殑緙虹渷鐨凲ItemDelegate浜嬩歡榪囨護(hù)鍣ㄦ崟鑾楓傚榪欎釜緙虹渷鐨勪簨浠惰繃婊ゆ潵璁詫紝褰撶敤鎴鋒寜涓嬪洖杞﹂敭錛宒elegate浼?xì)瀵筸odel涓殑鏁版嵁榪涜鎻愪氦錛屽茍鍏抽棴spin box銆?br>鎴戜滑鍙互瀹夎鑷繁鐨勪簨浠惰繃婊ゅ櫒浠ヨ繋鍚堟垜浠殑闇瑕侊紝渚嬪錛屾垜浠彲浠ュ彂灝勫甫鏈塃ditNextItem hint鐨?br>closeEditor()淇″彿鏉ュ疄鐜拌嚜鍔ㄥ紑濮嬬紪杈憊iew涓殑涓嬩竴欏廣?/p>
]]>
鍦╲iews涓夋嫨鏁版嵁欏?/em>
姒傚康
鐢ㄤ簬鏂扮殑view綾諱腑鐨勯夋嫨妯″瀷姣擰t3涓殑妯″瀷鏈変簡(jiǎn)寰堝ぇ鐨勬敼榪涖傚畠涓哄熀浜巑odel/view鏋舵瀯鐨勯夋嫨鎻愪緵浜?jiǎn)鏇翠负鍏ㄩ潰鐨勬弿杩般傚敖綆″鎻愪緵浜?jiǎn)鐨剉iews鏉ヨ錛岃礋璐ｆ搷綰甸夋嫨鐨勬爣鍑嗙被宸茬粡瓚充互搴斾粯錛屼絾鏄綘涔熷彲浠ュ垱寤虹壒瀹氱殑閫夋嫨妯″瀷鏉ユ弧瓚充綘鐗規(guī)畩鐨勯渶姹傘?br>鍏充簬鍦╲iew琚夋嫨鐨勬暟鎹」鐨勪俊鎭繚鎸佸湪QItemSelectionModel綾葷殑瀹炰緥涓傚畠涔熶負(fù)姣忎釜鐙珛鐨刴odel涓殑鏁版嵁欏圭淮鎶odel indexes淇℃伅錛屼笌浠諱綍views閮藉叧鑱斿叧緋匯傛棦鐒朵竴涓猰odel鍙敤浜庡涓獀iews,閭ｄ箞鍦ㄥ涓獀iews涔嬮棿鍏變韓閫夋嫨淇℃伅涔熸槸鍙互鍋氬埌鐨勶紝榪欎嬌寰楀涓獀iews鍙互浠ヤ竴鑷寸殑鏂瑰紡榪涜鏄劇ず銆?br>閫夋嫨鐢卞涓夋嫨鑼冨洿緇勬垚銆傞氳繃浠呬粎璁板綍寮濮媘odel indexes涓庣粨鏉焟odel indexes錛屾渶澶у寲鍦拌褰曚簡(jiǎn)鍙互閫夋嫨鐨勮寖鍥淬傞潪榪炵畫(huà)閫夋嫨鏁版嵁欏圭敱澶氫釜閫夋嫨鑼冨洿鏉ユ弿榪般傞夋嫨妯″瀷璁板綍model indexes鐨勯泦鍚堟潵鎻忚堪涓涓夋嫨銆傛渶榪戦夋嫨鐨勬暟鎹」琚О涓?span style="COLOR: #0000ff">current selection銆傚簲鐢ㄧ▼搴忓彲浠ラ氳繃浣跨敤鏌愮綾誨瀷鐨勯夋嫨鍛戒護(hù)鏉ヤ慨鏀歸夋嫨鐨勬晥鏋溿?br>鍦ㄨ繘琛岄夋嫨鎿嶄綔鏃訛紝鍙互鎶?span style="COLOR: #0000ff">QItemSelectionModel鐪嬫垚鏄痬odel涓墍鏈夋暟鎹」閫夋嫨鐘舵佺殑涓涓褰曘備竴鏃﹀緩绔嬩竴涓夋嫨妯″瀷錛屾墍鏈夐」鐨勯泦鍚堥兘鍙互閫夋嫨錛屾挙娑堥夋嫨錛屾垨鑰呴夋嫨鐘舵佽繘琛屽垏鎹㈣屼笉闇瑕佺煡閬撳摢涓暟鎹」鏄惁宸茬粡琚夋嫨榪囥傛墍鏈夎閫夋嫨鐨勯」鐨刬ndexes鍦ㄤ換浣曟椂鍊欓兘鍙互寰楀埌錛岄氳繃淇″彿妲芥満鍒跺彲浠ラ氱煡鍒殑緇勪歡鍙戠敓鐨勫彉鍖栥?br>
浣跨敤閫夋嫨妯″瀷
鏍囧噯view綾繪彁渚涗簡(jiǎn)緙虹渷鐨勯夋嫨妯″瀷錛屽畠浠彲浠ュ湪澶ф鏁扮▼搴忎腑浣跨敤銆備竴涓獀iew涓殑閫夋嫨妯″瀷鍙互閫氳繃璋冪敤view鐨勫嚱鏁?span style="COLOR: #ff00ff">selectionModel()鍙栧緱錛屼篃鍙互閫氳繃setSelectionModel()鍦ㄥ涓獀iews涔嬮棿鍏變韓閫夋嫨妯″瀷錛屽洜姝ゆ葷殑鏉ヨ鏋勫緩涓涓柊鐨勬ā鍨嬩竴鑸儏鍐典笉澶繀瑕併?br>閫氳繃緇?span style="COLOR: #0000ff">QItemSelection鎸囧畾涓涓猰odel,涓瀵筸odel indexes錛屽彲浠ュ垱寤轟竴涓夋嫨銆俰ndexes鐨勭敤娉曚緷璧栦簬緇欏畾鐨刴odel,榪欎袱涓猧ndexes琚В閲婃垚閫夋嫨鐨勫尯鍧椾腑鐨勫乏涓婅欏瑰拰鍙充笅瑙掗」銆俶odel涓殑欏圭殑閫夋嫨鏈嶄粠浜庨夋嫨妯″瀷銆?br>
閫夋嫨欏?/span>
鏋勫緩涓涓猼able model 錛屽畠鏈?2涓」錛岀敤涓涓猼able view榪涜鏄劇ず錛?br> TableModel *model = new TableModel(8, 4, &app);
QTableView *table = new QTableView(0);
table->setModel(model);
QItemSelectionModel *selectionModel = table->selectionModel();
QModelIndex topLeft;
QModelIndex bottomRight;
topLeft = model->index(0, 0, QModelIndex());
bottomRight = model->index(5, 2, QModelIndex());
QItemSelection selection(topLeft, bottomRight);
selectionModel->select(selection, QItemSelectionModel::Select);
緇撴灉濡備笅錛?br>
璇誨彇閫夋嫨鐘舵?/span>
瀛樺偍鍦ㄩ夋嫨妯″瀷涓璱ndexes鍙互鐢╯electionIndexes()鍑芥暟鏉ヨ鍙栥傚畠榪斿洖涓涓湭鎺掑簭鐨刴odel indexes鍒楄〃錛屾垜浠彲浠ラ亶鍘嗗畠錛屽鏋滄垜浠煡閬撲粬浠叧鑱斾簬鍝釜model鐨勮瘽銆?br> QModelIndexList indexes = selectionModel->selectedIndexes();
QModelIndex index;
foreach(index, indexes) {
QString text = QString("(%1,%2)").arg(index.row()).arg(index.column());
model->setData(index, text);
}
閫夋嫨妯″瀷鍦ㄩ夋嫨鍙戠敓鍙樺寲鏃朵細(xì)鍙戝嚭淇″彿銆傝繖鐢ㄤ簬閫氱煡鍒殑緇勪歡鍖呮嫭鏁翠綋涓庡綋鍓嶇劍鐐歸」鎵鍙戠敓鐨勫彉鍖栥傛垜浠彲浠ヨ繛鎺electionChanged()淇″彿鍒頒竴涓Ы錛屾鏌ュ綋淇″彿浜х敓鏃跺摢浜涢」琚夋嫨鎴栬鍙栨秷閫夋嫨銆傝繖涓Ы琚皟鐢ㄦ椂甯︽湁涓や釜鍙傛暟錛屽畠浠兘鏄?span style="COLOR: #0000ff">QItemSelection瀵硅薄錛屼竴涓寘鍚柊琚夋嫨鐨勯」錛屽彟涓涓寘鍚柊榪戣鍙栨秷閫夋嫨鐨勯」銆備笅闈㈢殑浠ｇ爜婕旂ず浜?jiǎn)缁欐柊閫夋嫨鐨勯」娣誨姞鏁版嵁鍐呭錛屾柊榪戣鍙栨秷閫夋嫨鐨勯」鐨勫唴瀹硅娓呯┖銆?br>void MainWindow::updateSelection(const QItemSelection &selected,
const QItemSelection &deselected)
{
QModelIndex index;
QModelIndexList items = selected.indexes();
foreach (index, items) {
QString text = QString("(%1,%2)").arg(index.row()).arg(index.column());
model->setData(index, text);
}
items = deselected.indexes();
foreach (index, items)
model->setData(index, "");
}
涔熷彲浠ラ氳繃鍝嶅簲currentChanged()淇″彿鏉ヨ窡韙綋鍓嶇劍鐐歸」.瀵瑰簲鐨勬Ы灝辨湁涓や釜鎺ユ敹鍙傛暟錛屼竴涓〃紺轟箣鍓嶇殑鐒︾偣錛屽彟涓涓〃紺哄綋鍓嶇殑鐒︾偣銆?br>void MainWindow::changeCurrent(const QModelIndex ¤t,
const QModelIndex &previous)
{
statusBar()->showMessage(
tr("Moved from (%1,%2) to (%3,%4)")
.arg(previous.row()).arg(previous.column())
.arg(current.row()).arg(current.column()));
}
鏇存柊閫夋嫨
閫夋嫨鎸囦護(hù)鏄氳繃閫夋嫨鏍囧織鎻愪緵鐨勶紝瀹冭瀹氫箟鍦≦ItemSelectionModel::SelectionFlag涓傚父鐢ㄧ殑鏈塖elect鏍囪錛孴oggle鏍囪錛孌eselect鏍囪,Current鏍囪錛孋lear鏍囪錛屽叾鎰忎箟涓鐩簡(jiǎn)鐒躲傛部涓婇潰渚嬪瓙鐨勭粨鏋滄墽琛屼互涓嬩唬鐮侊細(xì)
QItemSelection toggleSelection;
topLeft = model->index(2, 1, QModelIndex());
bottomRight = model->index(7, 3, QModelIndex());
toggleSelection.select(topLeft, bottomRight);
selectionModel->select(toggleSelection, QItemSelectionModel::Toggle);
緇撴灉濡備笅:
緙虹渷鎯呭喌涓嬶紝閫夋嫨鎸囦護(hù)鍙拡瀵瑰崟涓」(鐢眒odel indexes鎸囧畾)銆傜劧鑰岋紝閫夋嫨鎸囦護(hù)鍙互閫氳繃涓庡彟澶栨爣璁扮殑緇撳悎鏉ユ敼鍙樻暣琛屽拰鏁村垪銆備婦渚嬫潵璇達(dá)紝鍋囧浣犲彧浣跨敤涓涓猧ndex鏉ヨ皟鐢╯elect(),浣嗘槸鐢⊿elect鏍囪涓嶳ows鏍囪鐨勭粍鍚堬紝閭ｄ箞鍖呮嫭閭ｄ釜欏圭殑鏁磋閮藉皢琚夋嫨銆傜湅浠ヤ笅紺轟緥錛?br> QItemSelection columnSelection;
topLeft = model->index(0, 1, QModelIndex());
bottomRight = model->index(0, 2, QModelIndex());
columnSelection.select(topLeft, bottomRight);
selectionModel->select(columnSelection,
QItemSelectionModel::Select | QItemSelectionModel::Columns);
QItemSelection rowSelection;
topLeft = model->index(0, 0, QModelIndex());
bottomRight = model->index(1, 0, QModelIndex());
rowSelection.select(topLeft, bottomRight);
selectionModel->select(rowSelection,
QItemSelectionModel::Select | QItemSelectionModel::Rows);
緇撴灉濡備笅
閫夋嫨妯″瀷涓墍鏈夐」
涓轟簡(jiǎn)閫夋嫨model涓殑鎵鏈夐」錛屽繀欏誨厛寰楀垱寤轟竴涓夋嫨錛屽畠鍖呮嫭褰撳墠灞傛涓婄殑鎵鏈夐」:
QModelIndex topLeft = model->index(0, 0, parent);
QModelIndex bottomRight = model->index(model->rowCount(parent)-1,
model->columnCount(parent)-1, parent);
QItemSelection selection(topLeft, bottomRight);
selectionModel->select(selection, QItemSelectionModel::Select);
欏剁駭index鍙互榪欐牱錛?br>QModelIndex parent = QModelIndex();
瀵瑰叿鏈夊眰嬈＄粨鏋勭殑model鏉ヨ錛屽彲浠ヤ嬌鐢?span style="COLOR: #ff00ff">hasChildren()鍑芥暟鏉ュ喅瀹氱粰瀹氶」鏄惁鏄叾瀹冮」鐨勭埗欏廣?br>
]]>
View 綾?br>
姒傚康
鍦╩odel/view鏋舵瀯涓紝view浠巑odel涓幏寰楁暟鎹」鐒跺悗鏄劇ず緇欑敤鎴楓傛暟鎹樉紺虹殑鏂瑰紡涓嶅繀涓巑odel鎻愪緵鐨勮〃紺烘柟寮忕浉鍚岋紝鍙互涓庡簳灞傚瓨鍌ㄦ暟鎹」鐨勬暟鎹粨鏋勫畬鍏ㄤ笉鍚屻?br>鍐呭涓庢樉寮忕殑鍒嗙鏄氳繃鐢?span style="COLOR: #0000ff">QAbstractItemModel鎻愪緵鐨勬爣鍑嗘ā鍨嬫帴鍙ｏ紝鐢?span style="COLOR: #0000ff">QAsbstractItemview鎻愪緵鐨勬爣鍑嗚鍥炬帴鍙ｅ叡鍚屽疄鐜扮殑銆傛櫘閬嶄嬌鐢╩odel index鏉ヨ〃紺烘暟鎹」銆倂iew璐熻矗綆＄悊浠巑odel涓鍙栫殑鏁版嵁鐨勫瑙傚竷灞銆?br>瀹冧滑鑷繁鍙互鍘繪覆鏌撴瘡涓暟鎹」錛屼篃鍙互鍒╃敤delegate鏉ユ棦澶勭悊娓叉煋鍙堣繘琛岀紪杈戙?br>闄や簡(jiǎn)鏄劇ず鏁版嵁錛寁iews涔熷鐞嗘暟鎹」鐨勫鑸紝鍙備笌鏈夊叧浜庢暟鎹」閫夋嫨鐨勯儴鍒嗗姛鑳姐倂iew涔熷疄鐜頒竴浜涘熀鏈殑鐢ㄦ埛鎺ュ彛鐗規(guī)э紝濡備笂涓嬫枃鑿滃崟涓庢嫋鎷藉姛鑳姐倂iew涔熶負(fù)鏁版嵁欏規(guī)彁渚涗簡(jiǎn)緙虹渷鐨勭紪紼嬪姛鑳斤紝涔熷彲鎼厤delegate瀹炵幇鏇翠負(fù)鐗規(guī)畩鐨勫畾鍒剁紪杈戠殑闇姹傘?br>涓涓獀iew鍒涘緩鏃跺繀涓嶉渶瑕乵odel,浣嗗湪瀹冭兘鏄劇ず涓浜涚湡姝ｆ湁鐢ㄧ殑淇℃伅涔嬪墠錛屽繀欏繪彁渚涗竴涓猰odel銆倂iew閫氳繃浣跨敤
selections鏉ヨ窡韙敤鎴烽夋嫨鐨勬暟鎹」銆傛瘡涓獀iew鍙互緇存姢鍗曠嫭浣跨敤鐨剆elections錛屼篃鍙互鍦ㄥ涓獀iews涔嬮棿鍏變韓銆傛湁浜泇iews,濡?span style="COLOR: #0000ff">QTableView鍜?span style="COLOR: #0000ff">QTreeView,闄ゆ暟鎹」涔嬪涔熷彲鏄劇ず鏍囬(Headers)錛屾爣棰橀儴鍒嗛氳繃涓涓獀iew鏉ュ疄鐜幫紝QHeaderView銆傛爣棰樹(shù)笌view涓鏍鋒繪槸浠庣浉鍚岀殑model涓幏鍙栨暟鎹備粠 model涓幏鍙栨暟鎹殑鍑芥暟鏄?span style="COLOR: #0000ff">QabstractItemModel::headerDate()錛屼竴鑸繪槸浠ヨ〃鍗曠殑褰㈠紡涓樉紺烘爣棰樹(shù)俊鎭傚彲浠ヤ粠QHeaderView瀛愮被鍖栵紝浠ュ疄鐜版洿涓哄鏉傜殑瀹氬埗鍖栭渶姹傘?br>
浣跨敤鐜版垚鐨剉iew
Qt鎻愪緵浜?jiǎn)涓変釜鐜版垚鐨剉iew 綾伙紝瀹冧滑鑳藉浠ョ敤鎴風(fēng)啛鎮(zhèn)夌殑鏂瑰紡鏄劇ずmodel涓殑鏁版嵁銆?span style="COLOR: #0000ff">QListView鎶妋odel涓殑鏁版嵁欏逛互涓涓畝鍗曠殑鍒楄〃鐨勫艦寮忔樉紺猴紝鎴栨槸浠ョ粡鍏哥殑鍥炬爣瑙嗗浘鐨勫艦寮忔樉紺恒?span style="COLOR: #0000ff">QTreeView鎶妋odel涓殑鏁版嵁欏逛綔涓哄叿鏈夊眰嬈＄粨鏋勭殑鍒楄〃鐨勫艦寮忔樉紺猴紝瀹冨厑璁鎬互绱у噾鐨勬繁搴﹀祵濂楃殑緇撴瀯榪涜鏄劇ず銆?span style="COLOR: #0000ff">QTableView鍗存槸鎶妋odel涓殑鏁版嵁欏逛互琛ㄦ牸鐨勫艦寮忓睍鐜幫紝鏇村儚鏄竴涓數(shù)瀛愯〃鏍煎簲鐢ㄧ▼搴忕殑澶栬甯冨眬銆?br>
浠ヤ笂榪欎簺鏍囧噯view鐨勮涓鴻凍浠ュ簲浠樺ぇ澶氭暟鐨勫簲鐢ㄧ▼搴忥紝瀹冧滑涔熸彁渚涗簡(jiǎn)涓浜涘熀鏈殑緙栬緫鍔熻兘錛屼篃鍙互瀹氬埗鐗規(guī)畩鐨勯渶姹傘?/p>
浣跨敤model
浠ュ墠鐨勪緥瀛愪腑鍒涘緩榪囦竴涓猻tring list model,鍙互緇欏畠璁劇疆涓浜涙暟鎹紝鍐嶅垱寤轟竴涓獀iew鎶妋odel涓殑鍐呭灞曠ず鍑烘潵錛?br>int main(int argc, char *argv[])
{
QApplication app(argc, argv);
// Unindented for quoting purposes:
QStringList numbers;
numbers << "One" << "Two" << "Three" << "Four" << "Five";
QAbstractItemModel *model = new StringListModel(numbers);
//瑕佹敞鎰忕殑鏄紝榪欓噷鎶奡tringListModel浣滀負(fù)涓涓猀AbstractItemModel鏉ヤ嬌鐢ㄣ傝繖鏍鋒垜浠氨鍙互
//浣跨敤model涓殑鎶借薄鎺ュ彛錛岃屼笖濡傛灉灝嗘潵鎴戜滑鐢ㄥ埆鐨刴odel浠ｆ浛浜?jiǎn)褰撳墠杩欎釜model,榪欎簺浠ｇ爜涔熶細(xì)鐓ф牱宸ヤ綔銆?br> //QListView鎻愪緵鐨勫垪琛ㄨ鍥捐凍浠ユ弧瓚沖綋鍓嶈繖涓猰odel鐨勯渶瑕佷簡(jiǎn)銆?br> QListView *view = new QListView;
view->setModel(model);
view->show();
return app.exec();
}
view浼?xì)娓叉煋model涓殑鍐呭錛岄氳繃model鐨勬帴鍙ｆ潵璁塊棶瀹冪殑鏁版嵁銆傚綋鐢ㄦ埛璇曞浘緙栬緫鏁版嵁欏規(guī)椂錛寁iew浼?xì)鋴社敤缂虹渷鐨刣elegate鏉ユ彁渚涗竴涓紪杈戞瀯浠躲?br>涓涓猰odel,澶氫釜views
涓哄涓獀iews鎻愪緵鐩稿悓鐨刴odel鏄潪甯哥畝鍗曠殑浜嬫儏錛屽彧瑕佷負(fù)姣忎釜view璁劇疆鐩稿悓鐨刴odel銆?br> QTableView *firstTableView = new QTableView;
QTableView *secondTableView = new QTableView;
firstTableView->setModel(model);
secondTableView->setModel(model);
鍦╩odel/view鏋舵瀯涓俊鍙楓佹Ы鏈哄埗鐨勪嬌鐢ㄦ剰鍛崇潃model涓彂鐢熺殑鏀瑰彉?shù)細(xì)浼犻掍腑鑱旂粨鐨勬墍鏈塿iew涓紝榪欎繚璇佷簡(jiǎn)
涓嶇鎴戜滑浣跨敤鍝釜view錛岃闂殑閮芥槸鍚屾牱鐨勪竴浠芥暟鎹?br>
涓婇潰鐨勫浘灞曠ず浜?jiǎn)涓涓猰odel涓婄殑涓や釜涓嶅悓鐨剉iews,灝界鍦ㄤ笉鍚岀殑view涓樉紺虹殑model涓殑鏁版嵁鏄竴鑷寸殑錛屾瘡涓?br>view閮界淮鎶ゅ畠浠嚜宸辯殑鍐呴儴閫夋嫨妯″瀷錛屼絾鏈夋椂鍊欏湪鏌愪簺鎯呭喌涓嬶紝鍏變韓涓涓夋嫨妯″瀷涔熸槸鍚堢悊鐨勩?/p>
澶勭悊鏁版嵁欏圭殑閫夋嫨
view涓暟鎹」閫夋嫨鏈哄埗鐢?span style="COLOR: #0000ff">QItemSelectionModel綾繪彁渚涖傛墍鏈夋爣鍑嗙殑view緙虹渷閮芥瀯寤哄畠浠嚜宸辯殑閫夋嫨妯″瀷錛?br>浠ユ爣鍑嗙殑鏂瑰紡涓庡畠浠氦浜掋傞夋嫨妯″瀷鍙互鐢?strong style="COLOR: #800080">selectionModel()鍑芥暟鍙栧緱錛屾浛浠ｇ殑閫夋嫨妯″瀷涔熷彲浠ラ氳繃
setSelectionModel()鏉ヨ緗傚綋鎴戜滑鎯沖湪涓涓猰odel涓婃彁渚涘涓竴鑷寸殑views鏃訛紝榪欑瀵歸夋嫨妯″瀷鐨勬帶鍒惰兘鍔涢潪甯告湁鐢ㄣ傞氬父鏉ヨ錛岄櫎闈炰綘瀛愮被鍖栦竴涓猰odel鎴杤iew,浣犱笉蹇呯洿鎺ユ搷綰祍elections鐨勫唴瀹廣?br>
澶氫釜views涔嬮棿鍏變韓閫夋嫨
鎺ョ潃涓婅竟鐨勪緥瀛愶紝鎴戜滑鍙互榪欐牱錛?br>secondTableView->setSelectionModel(firstTableView->selectionModel());
鐜板湪鎵鏈塿iews閮藉湪鍚屾牱鐨勯夋嫨妯″瀷涓婃搷浣滐紝鏁版嵁涓庨夋嫨欏歸兘淇濇寔鍚屾銆?br>
涓婇潰鐨勪緥瀛愪腑錛屼袱涓獀iew鐨勭被鍨嬫槸鐩稿悓鐨勶紝鍋囧榪欎袱涓獀iew綾誨瀷涓嶅悓錛岄偅涔堟墍閫夋嫨鐨勬暟鎹」鍦ㄦ瘡涓獀iew
涓殑琛ㄧ幇褰㈠紡浼?xì)鏈夊緢澶х殑涓嶅悓銆備緥濡傦紝鍦ㄤ竴涓猼able view涓竴涓繛緇殑閫夋嫨錛屽湪涓涓猼ree view涓〃鐜板嚭
鏉ョ殑鍙兘浼?xì)鏄嚑涓珮?shù)寒鐨勬暟鎹」鐗囨柇鐨勭粍鍚堛?/p>
鍒涘緩鏂扮殑Models
浠嬬粛
model/view緇勪歡涔嬮棿鍔熻兘鐨勫垎紱伙紝鍏佽鍒涘緩model鍒╃敤鐜版垚鐨剉iews銆傝繖涔熷彲浠ヤ嬌鐢ㄦ爣鍑嗙殑鍔熻兘 鍥懼艦鐢ㄦ埛鎺ュ彛緇勪歡鍍廞ListView,QTableView鍜孮TreeView鏉ユ樉紺烘潵鑷悇縐嶆暟鎹簮鐨勬暟鎹負(fù)銆?br>QAbstractListModel綾繪彁渚涗簡(jiǎn)闈炲父鐏墊椿鐨勬帴鍙ｏ紝鍏佽鏁版嵁婧愪互灞傛緇撴瀯鐨勫艦寮忔潵綆＄悊淇℃伅錛屼篃鍏佽浠ユ煇縐?br>鏂瑰紡瀵規(guī)暟鎹繘琛屾彃鍏ャ佸垹闄ゃ佷慨鏀瑰拰瀛樺偍銆傚畠涔熸彁渚涗簡(jiǎn)瀵規(guī)嫋鎷芥搷浣滅殑鏀寔銆?br>QAbstractListModel涓?span style="COLOR: #0000ff">QAbstractTableModel涓虹畝鍗曠殑闈炲眰嬈＄粨鏋勭殑鏁版嵁鎻愪緵浜?jiǎn)鎺ュ彛锛屽浜庢瘮杈兘巰鍗曠殑list鍜宼able models鏉ヨ錛岃繖鏄笉閿欑殑涓涓紑濮嬬偣銆?br>
璁捐涓涓狹odel
褰撴垜浠負(fù)瀛樺湪鐨勬暟鎹粨鏋勬柊寤轟竴涓猰odel鏃訛紝棣栧厛瑕佽冭檻鐨勯棶棰樻槸搴旇閫夌敤鍝model鏉ヤ負(fù)榪欎簺鏁版嵁鎻愪緵鎺ュ彛銆?br>鍋囧鏁版嵁緇撴瀯鍙互鐢ㄦ暟鎹」鐨勫垪琛ㄦ垨琛ㄦ潵琛ㄧず錛岄偅涔堝彲浠ヨ冭檻瀛愮被鍖?span style="COLOR: #0000ff">QAbstractListModel鎴?span style="COLOR: #0000ff">QAbstractTableModel
,鏃㈢劧榪欎簺綾誨凡緇忓悎鐞嗗湴瀵硅澶氬姛鑳芥彁渚涚己鐪佸疄鐜般?br>鐒惰岋紝鍋囧搴曞眰鐨勬暟鎹粨鏋勫彧鑳借〃紺烘垚鍏鋒湁灞傛緇撴瀯鐨勬爲(wèi)鍨嬬粨鏋勶紝閭ｄ箞蹇呴』寰楀瓙綾誨寲QAbstractItemModel銆?br>鏃犺搴曞眰鐨勬暟鎹粨鏋勯噰鍙栦綍縐嶅艦寮忥紝鍦ㄧ壒瀹氱殑model涓疄鐜版爣鍑嗙殑QAbstractItemModel API鎬繪槸涓涓笉閿欑殑涓繪剰錛岃繖浣垮緱鍙互浣跨敤鏇磋嚜鐒剁殑鏂瑰紡瀵瑰簳灞傜殑鏁版嵁緇撴瀯榪涜璁塊棶銆傝繖涔熶嬌寰楃敤鏁版嵁鏋勫緩model 鏇翠負(fù)瀹規(guī)槗錛屽叾浠?br>鐨刴odel/view緇勪歡涔熷彲浠ヤ嬌鐢ㄦ爣鍑嗙殑API涓庝箣榪涜浜や簰銆?br>
涓涓彧璇籱odel紺轟緥
榪欎釜紺轟緥瀹炵幇浜?jiǎn)涓涓畝鍗曠殑錛岄潪灞傛緇撴瀯鐨勶紝鍙鐨勬暟鎹甿odel,瀹冨熀浜?span style="COLOR: #0000ff">QStringistModel綾匯傚畠鏈変竴涓?span style="COLOR: #0000ff">QStringList浣滀負(fù)瀹冨唴閮ㄧ殑鏁版嵁婧愶紝鍙疄鐜頒簡(jiǎn)涓浜涘繀瑕佺殑鎺ュ彛銆備負(fù)浜?jiǎn)绠鍗曞寲錛屽畠瀛愮被鍖栦簡(jiǎn)QAbstractListModel,榪欎釜鍩虹被鎻愪緵浜?jiǎn)鍚堢悊鐨劸~虹渷琛屼負(fù)錛屽澶栨彁渚涗簡(jiǎn)姣?span style="COLOR: #0000ff">QAbstractItemModel鏇翠負(fù)綆鍗曠殑鎺ュ彛銆傚綋鎴戜滑瀹炵幇涓涓猰odel鏃訛紝涓嶈蹇樹(shù)簡(jiǎn)QAbstractItemModel鏈韓涓嶅瓨鍌ㄤ換浣曟暟鎹紝瀹冧粎浠呮彁渚涗簡(jiǎn)緇檝iews璁塊棶
鏁版嵁鐨勬帴鍙ｃ?br>class StringListModel : public QAbstractListModel
{
Q_OBJECT
public:
StringListModel(const QStringList &strings, QObject *parent = 0)
: QAbstractListModel(parent), stringList(strings) {}
int rowCount(const QModelIndex &parent = QModelIndex()) const;
QVariant data(const QModelIndex &index, int role) const;
QVariant headerData(int section, Qt::Orientation orientation,
int role = Qt::DisplayRole) const;
private:
QStringList stringList;
};
闄や簡(jiǎn)鏋勯犲嚱鏁幫紝鎴戜滑浠呴渶瑕佸疄鐜頒袱涓嚱鏁幫細(xì)rowCount()榪斿洖model涓殑琛屾暟錛?span style="COLOR: #ff00ff">data()榪斿洖涓庣壒瀹歮odel index瀵瑰簲鐨勬暟鎹」銆傚叿鏈夎壇濂借涓虹殑model涔熶細(xì)瀹炵幇headerData()錛屽畠榪斿洖tree鍜宼able views闇瑕佺殑錛屽湪鏍囬?shù)腑鏄窘C虹殑鏁版嵁銆?br>鍥犱負(fù)榪欐槸涓涓潪灞傛緇撴瀯鐨刴odel,鎴戜滑涓嶅繀鑰冭檻鐖跺瓙鍏崇郴銆傚亣濡俶odel鍏鋒湁灞傛緇撴瀯錛屾垜浠篃搴旇瀹炵幇index()涓?span style="COLOR: #ff00ff">parent()鍑芥暟銆?br>
Model鐨勫昂瀵?/strong>
鎴戜滑璁や負(fù)model涓殑琛屾暟涓巗tring list涓殑string鏁扮洰涓鑷達(dá)細(xì)
int StringListModel::rowCount(const QModelIndex &parent) const
{
return stringList.count();
}
鍦ㄧ己鐪佹儏鍐典笅錛屼粠QAbstractListModel媧劇敓鐨刴odel鍙叿鏈変竴鍒楋紝鍥犳涓嶉渶瑕佸疄鐜癱olumnCount()銆?br>
Model 鏍囬?shù)笌鏁版?/strong>
QVariant StringListModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
if (index.row() >= stringList.size())
return QVariant();
if (role == Qt::DisplayRole)
return stringList.at(index.row());
else
return QVariant();
}
QVariant StringListModel::headerData(int section, Qt::Orientation orientation,
int role) const
{
if (role != Qt::DisplayRole)
return QVariant();
if (orientation == Qt::Horizontal)
return QString("Column %1").arg(section);
else
return QString("Row %1").arg(section);
}
涓涓暟鎹」鍙兘鏈夊涓鑹詫紝鏍規(guī)嵁瑙掕壊鐨勪笉鍚岃緭鍑轟笉鍚岀殑鏁版嵁銆備笂渚嬩腑錛宮odel涓殑鏁版嵁欏瑰彧鏈変竴涓鑹?錛?br>DisplayRole,鐒惰屾垜浠篃鍙互閲嶇敤鎻愪緵緇橠isplayRole鐨勬暟鎹紝浣滀負(fù)鍒殑瑙掕壊浣跨敤錛屽鎴戜滑鍙互浣滀負(fù)ToolTipRole鏉ョ敤銆?br>
鍙紪杈戠殑model
涓婇潰鎴戜滑婕旂ず浜?jiǎn)涓涓彧璇葷殑model,瀹冨彧鐢ㄤ簬鍚戠敤鎴鋒樉紺猴紝瀵逛簬璁稿紼嬪簭鏉ヨ錛屽彲緙栬緫鐨刲ist model鍙兘鏇存湁鐢ㄣ傛垜浠彧闇瑕佺粰鍙鐨刴odel鎻愪緵鍙﹀涓や釜鍑芥暟flags()涓巗etData()鐨勫疄鐜般備笅鍒楀嚱鏁板０鏄庤娣誨姞鍒扮被瀹氫箟涓細(xì)
Qt::ItemFlags flags(const QModelIndex &index) const;
bool setData(const QModelIndex &index, const QVariant &value,
int role = Qt::EditRole);
璁﹎odel鍙紪杈?br>delegate浼?xì)鍦ㄥ垱寰従~栬緫鍣ㄤ箣鍓嶆鏌ユ暟鎹」鏄惁鏄彲緙栬緫鐨勩俶odel蹇呴』寰楄delegate鐭ラ亾瀹冪殑鏁版嵁欏規(guī)槸鍙?br>緙栬緫鐨勩傝繖鍙互閫氳繃涓烘瘡涓涓暟鎹」榪斿洖涓涓紜殑鏍囪寰楀埌錛屽湪鏈緥涓紝鎴戜滑鍋囪鎵鏈夌殑鏁版嵁欏歸兘鏄?br>鍙紪杈戝彲閫夋嫨鐨勶細(xì)
Qt::ItemFlags StringListModel::flags(const QModelIndex &index) const
{
if (!index.isValid())
return Qt::ItemIsEnabled;
return QAbstractItemModel::flags(index) | Qt::ItemIsEditable;
}
鎴戜滑涓嶅繀鐭ラ亾delegate鎵ц鎬庢牱瀹為檯鐨勭紪杈戝鐞嗚繃紼嬶紝鎴戜滑鍙渶鎻愪緵緇檇elegate涓涓柟娉曪紝delegate浼?xì)鋴社敤瀹冨model涓殑鏁版嵁榪涜璁劇疆銆傝繖涓壒孌婄殑鍑芥暟灝辨槸setData():
bool StringListModel::setData(const QModelIndex &index,
const QVariant &value, int role)
{
if (index.isValid() && role == Qt::EditRole) {
stringList.replace(index.row(), value.toString());
emit dataChanged(index, index);
return true;
}
return false;
}
褰撴暟鎹璁劇疆鍚庯紝model蹇呴』寰楄views鐭ラ亾涓浜涙暟鎹彂鐢熶簡(jiǎn)鍙樺寲錛岃繖鍙氳繃鍙戝皠涓涓猟ataChanged() 淇″彿瀹炵幇銆?br>鍥犱負(fù)鍙湁涓涓暟鎹」鍙戠敓浜?jiǎn)鍙樺寲锛屽洜姝ゅ湪淇″彿涓鏄庣殑鍙樺寲鑼冨洿鍙檺浜庝竴涓猰odel index銆?br>鎻掑叆錛屽垹闄よ
鍦╩odel涓敼鍙樿鏁頒笌鍒楁暟鏄彲鑳界殑銆傚綋鐒跺湪鏈垪涓紝鍙冭檻琛岀殑鎯呭喌錛屾垜浠彧闇瑕侀噸鏂板疄鐜版彃鍏ャ佸垹闄?br>鐨勫嚱鏁板氨鍙互浜?jiǎn)锛屼笅闈㈠簲鍦ňc誨畾涔変腑澹版槑錛?br> bool insertRows(int position, int rows, const QModelIndex &index = QModelIndex());
bool removeRows(int position, int rows, const QModelIndex &index = QModelIndex());
鏃㈢劧model涓殑姣忚瀵瑰簲浜庡垪琛ㄤ腑鐨勪竴涓猻tring,鍥犳錛宨nsertRows()鍑芥暟鍦╯tring list 涓寚瀹氫綅緗彃鍏ヤ竴涓┖string,
鐖秈ndex閫氬父鐢ㄤ簬鍐沖畾model涓鍒楃殑浣嶇疆錛屾湰渚嬩腑鍙湁涓涓崟鐙殑欏剁駭欏癸紝鍥版鍙渶瑕佸湪list涓彃鍏ョ┖string銆?br>bool StringListModel::insertRows(int position, int rows, const QModelIndex &parent)
{
beginInsertRows(QModelIndex(), position, position+rows-1);
for (int row = 0; row < rows; ++row) {
stringList.insert(position, "");
}
endInsertRows();
return true;
}
beginInsertRows()閫氱煡鍏朵粬緇勪歡琛屾暟灝嗕細(xì)鏀瑰彉銆俥ndInsertRows()瀵規(guī)搷浣滆繘琛岀‘璁や笌閫氱煡銆?br>榪斿洖true琛ㄧず鎴愬姛銆?br>鍒犻櫎鎿嶄綔涓庢彃鍏ユ搷浣滅被浼鹼細(xì)
bool StringListModel::removeRows(int position, int rows, const QModelIndex &parent)
{
beginRemoveRows(QModelIndex(), position, position+rows-1);
for (int row = 0; row < rows; ++row) {
stringList.removeAt(position);
}
endRemoveRows();
return true;
}
]]>
Model綾?br>
鍩烘湰姒傚康
鍦╩odel/view鏋勬灦涓紝model涓簐iew鍜宒elegates浣跨敤鏁版嵁鎻愪緵浜?jiǎn)鏍囧噯鎺ュ彛銆傚湪Qt涓紝鏍囧噯鎺ュ彛QAbstractItemModel綾諱腑琚畾涔夈備笉綆℃暟鎹湪搴曞眰浠ヤ綍縐嶆暟鎹粨鏋勫瓨鍌紝QAabstractItemModel鐨勫瓙綾諱細(xì)浠ュ眰嬈＄粨鏋勭殑褰㈠紡鏉ヨ〃紺烘暟鎹紝緇撴瀯涓寘鍚簡(jiǎn)鏁版嵁欏硅〃銆傛垜浠寜榪欑綰﹀畾鏉ヨ闂甿odel涓殑鏁版嵁欏癸紝浣嗚繖涓害瀹氫笉浼?xì)瀵瑰浣曟槃·簶q欎簺鏁版嵁鏈変換浣曢檺鍒躲傛暟鎹彂鐢熸敼鍙樻椂錛宮odel閫氳繃淇″彿妲芥満鍒舵潵閫氱煡鍏寵仈鐨剉iews銆?br>
Model Indexes
涓轟簡(jiǎn)浣挎暟鎹瓨鍌ㄤ笌鏁版嵁璁塊棶鍒嗗紑錛屽紩鍏ヤ簡(jiǎn)model index鐨勬蹇點(diǎn)傞氳繃model index錛屽彲浠ュ紩鐢╩odel涓殑鏁版嵁欏癸紝Views鍜宒elegates閮戒嬌鐢╥ndexes鏉ヨ闂暟鎹」錛岀劧鍚庡啀鏄劇ず鍑烘潵銆傚洜姝わ紝鍙湁model闇瑕佷簡(jiǎn)瑙ｅ浣曡幏鍙栨暟鎹紝琚玬odel綆＄悊鐨勬暟鎹被鍨嬪彲浠ラ潪甯稿箍娉涘湴琚畾涔夈侻odel indexes鍖呭惈涓涓寚鍚戝垱寤哄畠浠殑model鐨勬寚閽堬紝榪欎細(xì)鍦ㄩ厤鍚堝涓猰odel宸ヤ綔鏃墮伩鍏嶆販涔便?br>QAbstractItemModel *model = index.model();
model indexes鎻愪緵浜?jiǎn)瀵逛竴欏規(guī)暟鎹俊鎭殑涓存椂寮曠敤錛岄氳繃瀹冨彲浠ヨ闂垨鏄慨鏀筸odel涓殑鏁版嵁銆傛棦鐒秏odel鏈夋椂浼?xì)閲嶆柊缁劸l囧唴閮ㄧ殑鏁版嵁緇撴瀯錛岃繖鏃秏odel indexes渚夸細(xì)澶辨晥錛屽洜姝や笉搴旇淇濆瓨?shù)复鏃剁殑model indexes銆傚亣濡傞渶瑕佷竴涓鏁版嵁淇℃伅鐨勯暱鏈熺殑寮曠敤錛岄偅涔堝簲璇ュ垱寤轟竴涓?span style="COLOR: #0000ff">persistent model index銆傝繖涓紩鐢ㄤ細(xì)淇濇寔鏇存柊銆備復(fù)鏃剁殑model indexes鐢?span style="COLOR: #0000ff">QModelIndex鎻愪緵錛岃屽叿鏈夋寔涔呰兘鍔涚殑model indexes鍒欑敱QPersistentModelIndex鎻愪緵銆傚湪鑾峰彇瀵瑰簲涓涓暟鎹」鐨刴odel index鏃訛紝闇瑕佽冭檻鏈夊叧浜巑odel鐨勪笁涓睘鎬э細(xì)琛屾暟錛屽垪鏁幫紝鐖墮」鐨刴odel index銆?/p>
琛屼笌鍒?/strong>
鍦ㄦ渶鍩烘湰鐨勫艦寮忎腑錛屼竴涓猰odel鍙綔涓轟竴涓畝鍗曠殑琛ㄦ潵璁塊棶錛屾瘡涓暟鎹」鐢辮錛屽垪鏁版潵瀹氫綅銆傝繖蹇呬笉鎰忓懗鐫
搴曞眰鐨勬暟鎹敤鏁扮粍緇撴瀯鏉ュ瓨鍌ㄣ傝鍜屽垪鐨勪嬌鐢ㄤ粎浠呮槸涓縐嶇害瀹氾紝瀹冨厑璁哥粍浠朵箣闂寸浉浜掗氳銆傚彲浠ラ氳繃鎸囧畾
model涓殑琛屽垪鏁版潵鑾峰彇浠諱竴欏規(guī)暟鎹紝鍙互寰楀埌涓庢暟鎹」涓涓瀵瑰簲鐨勯偅涓猧ndex銆?br>QModelIndex index = model->index(row, column, ...);
Model涓虹畝鍗曠殑錛屽崟綰х殑鏁版嵁緇撴瀯濡俵ist涓巘ables鎻愪緵浜?jiǎn)鎺ュ彛锛屽畠浠涓婇潰浠ｇ爜鎵鏄劇ず鐨勯偅鏍鳳紝涓嶅啀闇瑕佸埆鐨勪俊鎭鎻愪緵銆傚綋鎴戜滑鍦ㄨ幏鍙栦竴涓猰odel index鏃訛紝鎴戜滑闇瑕佹彁渚涘彟澶栫殑淇℃伅銆?br>
涓婂浘浠ｈ〃涓涓熀鏈殑table model錛屽畠鐨勬瘡涓欏圭敤涓瀵硅鍒楁暟鏉ュ畾浣嶃傞氳繃琛屽垪鏁幫紝鍙互鑾峰彇浠ｈ〃涓涓暟鎹」鐨刴odel index .
QModelIndex indexA = model->index(0, 0, QModelIndex());
QModelIndex indexB = model->index(1, 1, QModelIndex());
QModelIndex indexC = model->index(2, 1, QModelIndex());
涓涓猰odel鐨勯《綰ч」,鐢盦ModelIndex()鍙栧緱錛屽畠浠笂寮忚鐢ㄤ綔鐖墮」銆?/p>
鐖墮」
綾諱技浜庤〃鐨勬帴鍙ｅ湪鎼厤浣跨敤table鎴杔ist view鏃剁悊鎯崇殑錛岃繖縐嶈鍒楃郴緇熶笌view鏄劇ず鐨勬柟寮忔槸紜垏鍖歸厤鐨勩?br>鐒跺垯錛屽儚tree views榪欑緇撴瀯闇瑕乵odel鎻愪緵鏇翠負(fù)鐏墊椿鐨勬帴鍙ｆ潵璁塊棶鏁版嵁欏廣傛瘡涓暟鎹」鍙兘鏄埆鐨勯」鐨?br>鐖墮」錛屼笂綰х殑欏瑰彲浠ヨ幏鍙栦笅綰ч」鐨勫垪琛ㄣ?br>褰撹幏鍙杕odel涓暟鎹」鐨刬ndex鏃訛紝鎴戜滑蹇呴』鎸囧畾鍏充簬鏁版嵁欏圭殑鐖墮」鐨勪俊鎭傚湪model澶栭儴錛屽紩鐢ㄤ竴涓暟鎹?br>欏圭殑鍞竴鏂規(guī)硶灝辨槸閫氳繃model index,鍥犳闇瑕佸湪姹傚彇model index鏃舵寚瀹氱埗欏圭殑淇℃伅銆?br>QModelIndex index = model->index(row, column, parent);
涓婂浘涓紝A欏瑰拰C欏逛綔涓簃odel涓《灞傜殑鍏勫紵欏癸細(xì)
QModelIndex indexA = model->index(0, 0, QModelIndex());
QModelIndex indexC = model->index(2, 1, QModelIndex());
A鏈夎澶氬瀛愶紝瀹冪殑涓涓瀛怋鐢ㄤ互涓嬩唬鐮佽幏鍙栵細(xì)
QModelIndex indexB = model->index(1, 0, indexA);
欏硅鑹?/span>
model涓殑欏瑰彲浠ヤ綔涓哄悇縐嶈鑹叉潵浣跨敤錛岃繖鍏佽涓轟笉鍚岀殑鐜鎻愪緵涓嶅悓鐨勬暟鎹備婦渚嬫潵璇達(dá)紝Qt::DisplayRole琚敤浜庤闂竴涓瓧絎︿覆錛屽畠浣滀負(fù)鏂囨湰浼?xì)鍦╲iew涓樉紺恒傚吀鍨嬪湴錛屾瘡涓暟鎹」閮藉彲浠ヤ負(fù)璁稿涓嶅悓鐨勮鑹叉彁渚涙暟鎹紝鏍囧噯鐨勮鑹插湪Qt::ItemDataRole涓畾涔夈傛垜浠彲浠ラ氳繃鎸囧畾model index涓庤鑹叉潵鑾峰彇鎴戜滑闇瑕佺殑鏁版嵁錛?br>QVariant value = model->data(index, role);
瑙掕壊鎸囧嚭浜?jiǎn)浠巑odel涓紩鐢ㄥ摢縐嶇被鍨嬬殑鏁版嵁銆倂iews鍙互鐢ㄤ笉鍚岀殑褰㈠紡鏄劇ず瑙掕壊錛屽洜姝や負(fù)姣忎釜瑙掕壊鎻愪緵姝ｇ‘
鐨勪俊鎭槸闈炲父閲嶈鐨勩傞氳繃涓烘瘡涓鑹叉彁渚涢傚綋鏁版嵁錛宮odel涔熶負(fù)views鍜宒elegates鎻愪緵浜?jiǎn)鏆椊C猴紝濡備綍姝ｇ‘鍦?br>鎶婅繖浜涙暟鎹」鏄劇粰鐢ㄦ埛銆備笉鍚岀殑views鍙互鑷敱鍦拌В鏋愭垨蹇界暐榪欎簺鏁版嵁淇℃伅錛屽浜庣壒孌婄殑鍦哄悎錛屼篃鍙互瀹氫箟
涓浜涢檮鍔犵殑瑙掕壊銆?br>姒傚康鎬葷粨錛?/strong>
1錛孧odel indexes涓簐iews涓巇elegages鎻愪緵model涓暟鎹」瀹氫綅鐨勪俊鎭紝瀹冧笌搴曞眰鐨勬暟鎹粨鏋勬棤鍏熾?br>2錛岄氳繃鎸囧畾琛岋紝鍒楁暟錛岀埗欏圭殑model index鏉ュ紩鐢ㄦ暟鎹」銆?br>3,渚濈収鍒殑緇勪歡鐨勮姹傦紝model indexes琚玬odel鏋勫緩銆?br>4錛屼嬌鐢╥ndex()鏃訛紝濡傛灉鎸囧畾浜?jiǎn)鏈夋晥鐨勭垑櫋圭殑model index,閭ｄ箞榪斿洖寰楀埌鐨刴odel index瀵瑰簲浜庣埗欏圭殑鏌愪釜瀛╁瓙銆?br>5錛屼嬌鐢╥ndex()鏃訛紝濡傛灉鎸囧畾浜?jiǎn)鏃犳晥鐨勭垑櫋圭殑model index,閭ｄ箞榪斿洖寰楀埌鐨刴odel index瀵瑰簲浜庨《灞傞」鐨勬煇涓瀛愩?br>6, 瑙掕壊瀵逛竴涓暟鎹」鍖呭惈鐨勪笉鍚岀被鍨嬬殑鏁版嵁緇欏嚭浜?jiǎn)鍖哄垎銆?/p>
浣跨敤Model Indexes
QDirModel *model = new QDirModel;
QModelIndex parentIndex = model->index(QDir::currentPath());
int numRows = model->rowCount(parentIndex);
for (int row = 0; row < numRows; ++row)
{
QModelIndex index = model->index(row, 0, parentIndex);
tring text = model->data(index, Qt::DisplayRole).toString();
// Display the text in a widget.
}
浠ヤ笂鐨勪緥瀛愯鏄庝簡(jiǎn)浠巑odel涓幏鍙栨暟鎹殑鍩烘湰鍘熷垯錛?br>1錛宮odel鐨勫昂瀵稿彲浠ヤ粠rowCount()涓?span style="COLOR: #ff00ff">columnCount()涓緱鍑恒傝繖浜涘嚱鏁伴氬父閮介渶瑕佷竴涓〃紺虹埗欏圭殑model index銆?br>2錛宮odel indexes鐢ㄦ潵浠巑odel涓闂暟鎹」錛屾暟鎹」鐢ㄨ錛屽垪錛岀埗欏筸odel index瀹氫綅銆?br>3, 涓轟簡(jiǎn)璁塊棶model欏跺眰欏癸紝鍙互浣跨敤QModelIndex()鎸囧畾銆?br>4, 鏁版嵁欏逛負(fù)涓嶅悓鐨勮鑹叉彁渚涗笉鍚岀殑鏁版嵁銆備負(fù)浜?jiǎn)鑾峰彇鏁版嵁锛岄櫎浜?jiǎn)model index涔嬪錛岃繕瑕佹寚瀹氳鑹層?br>
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浠嬬粛
Qt 4鎺ㄥ嚭浜?jiǎn)涓緇勬柊鐨刬tem view綾伙紝瀹冧滑浣跨敤model/view緇撴瀯鏉ョ鐞嗘暟鎹笌琛ㄧず灞傜殑鍏崇郴銆傝繖縐嶇粨鏋勫甫鏉ョ殑
鍔熻兘涓婄殑鍒嗙緇欎簡(jiǎn)寮鍙戜漢鍛樻洿澶х殑寮規(guī)ф潵瀹氬埗鏁版嵁欏圭殑琛ㄧず錛屽畠涔熸彁渚涗竴涓爣鍑嗙殑model鎺ュ彛錛屼嬌寰楁洿澶氱殑
鏁版嵁婧愬彲浠ヨ榪欎簺item view浣跨敤銆傝繖閲屽model/view鐨勭粨鏋勮繘琛屼簡(jiǎn)鎻忚堪錛岀粨鏋勪腑鐨勬瘡涓粍浠墮兘榪涜浜?jiǎn)瑙ｉ噴锛?br>緇欏嚭浜?jiǎn)涓浜涗緥瀛愯鏄庝簡(jiǎn)鎻愪緵鐨勮繖浜涚被濡備綍浣跨敤銆?/p>
Model/View 緇撴瀯
Model-View-Controller(MVC)錛?鏄粠Smalltalk鍙戝睍鑰屾潵鐨勪竴縐嶈璁℃ā寮忥紝甯歌鐢ㄤ簬鏋勫緩鐢ㄦ埛鐣岄潰銆傜粡鍏歌璁℃ā寮忕殑钁椾綔涓湁榪欐牱鐨勬弿榪幫細(xì)
MVC 鐢變笁縐嶅璞＄粍鎴愩侻odel鏄簲鐢ㄧ▼搴忓璞★紝View鏄畠鐨勫睆騫曡〃紺猴紝Controller瀹氫箟浜?jiǎn)鐢ㄦ堬L(fēng)晫闈㈠浣曞鐢ㄦ埛杈撳叆榪涜鍝嶅簲銆傚湪MVC涔嬪墠錛岀敤鎴風(fēng)晫闈㈣璁″懼悜浜庝笁鑰呮弶鍚堝湪涓璧鳳紝MVC瀵瑰畠浠繘琛屼簡(jiǎn)瑙ｈ︼紝鎻愰珮?shù)簡(jiǎn)鐏祴z繪т笌閲嶇敤鎬с?/em>
鍋囧鎶妚iew涓巆ontroller緇撳悎鍦ㄤ竴璧鳳紝緇撴灉灝辨槸model/view緇撴瀯銆傝繖涓粨鏋勪緷鐒舵槸鎶婃暟鎹瓨鍌ㄤ笌鏁版嵁琛ㄧず榪涜浜?jiǎn)鍒喖浕锛屽畠涓嶮VC閮藉熀浜庡悓鏍風(fēng)殑鎬濇兂錛屼絾瀹冩洿綆鍗曚竴浜涖傝繖縐嶅垎紱諱嬌寰楀湪鍑犱釜涓嶅悓鐨剉iew涓婃樉紺哄悓涓涓暟鎹垚涓哄彲鑳斤紝涔熷彲浠ラ噸鏂板疄鐜版柊鐨剉iew,鑰屼笉蹇呮敼鍙樺簳灞傜殑鏁版嵁緇撴瀯銆備負(fù)浜?jiǎn)鏇寸亯|椿鐨勫鐢ㄦ埛杈撳叆榪涜澶勭悊錛屽紩鍏ヤ簡(jiǎn)delegate榪欎釜姒傚康銆傚畠鐨勫ソ澶勬槸錛屾暟鎹」鐨勬覆鏌撲笌緙栫▼鍙互榪涜瀹氬埗銆?br>
濡備笂鍥炬墍紺猴紝model涓庢暟鎹簮閫氳錛屽茍鎻愪緵鎺ュ彛緇欑粨鏋勪腑鐨勫埆鐨勭粍浠朵嬌鐢ㄣ傞氳鐨勬ц川渚濊禆浜庢暟鎹簮鐨勭綾?br>涓巑odel瀹炵幇鐨勬柟寮忋倂iew浠巑odel鑾峰彇model indexes,鍚庤呮槸鏁版嵁欏圭殑寮曠敤銆傞氳繃鎶妋odel indexes鎻愪緵緇檓odel,view鍙互浠庢暟鎹簮涓幏鍙栨暟鎹?/p>
鍦ㄦ爣鍑嗙殑views涓紝delegate浼?xì)瀵规暟鎹畽骞杩涜娓叉煋锛屽綋鏌愪釜鏁版嵁椤硅閫変腑鏃訛紝delegate閫氳繃model indexes涓巑odel鐩存帴榪涜浜ゆ祦銆傛葷殑鏉ヨ錛宮odel/view 鐩稿叧綾誨彲浠ヨ鍒嗘垚涓婇潰鎵鎻愬埌鐨勪笁緇勶細(xì)models,views,delegates銆傝繖浜涚粍浠墮氳繃鎶借薄綾繪潵瀹氫箟錛屽畠浠彁渚涗簡(jiǎn)鍏卞悓鐨勬帴鍙ｏ紝鍦ㄦ煇浜涙儏鍐典笅錛岃繕鎻愪緵浜?jiǎn)缂虹渷鐨勫疄鐜般傛娊璞＄被鎰忓懗鐫闇瑕佸瓙綾誨寲浠ユ彁渚涘畬鏁寸殑鍏朵粬緇勪歡甯屾湜鐨勫姛鑳姐傝繖涔熷厑璁稿疄鐜板畾鍒剁殑緇勪歡銆俶odels,views,delegates涔嬮棿閫氳繃淇″彿錛屾Ы鏈哄埗鏉ヨ繘琛岄氳錛?/p>
浠巑odel鍙戝嚭鐨勪俊鍙烽氱煡view鏁版嵁婧愪腑鐨勬暟鎹彂鐢熶簡(jiǎn)鏀瑰彉銆?br>浠巚iew鍙戝嚭鐨勪俊鍙鋒彁渚涗簡(jiǎn)鏈夊叧琚樉紺虹殑鏁版嵁欏逛笌鐢ㄦ埛浜や簰鐨勪俊鎭?br>浠巇elegate鍙戠敓鐨勪俊鍙瘋鐢ㄤ簬鍦ㄧ紪杈戞椂閫氱煡model鍜寁iew鍏充簬褰撳墠緙栬緫鍣ㄧ殑鐘舵佷俊鎭?/p>
Models
鎵鏈夌殑item models閮藉熀浜?span style="COLOR: #0000ff">QAbstractItemModel綾伙紝榪欎釜綾誨畾涔変簡(jiǎn)鐢ㄤ簬views鍜宒elegates璁塊棶鏁版嵁鐨勬帴鍙ｃ?br>鏁版嵁鏈韓涓嶅繀瀛樺偍鍦╩odel,鏁版嵁鍙緗簬涓涓暟鎹粨鏋勬垨鍙﹀鐨勭被錛屾枃浠訛紝鏁版嵁搴擄紝鎴栧埆鐨勭▼搴忕粍浠朵腑銆?br>鍏充簬model鐨勫熀鏈蹇靛湪Model Classes閮ㄥ垎涓弿榪般?br>QAbstractItemModel鎻愪緵緇欐暟鎹竴涓帴鍙ｏ紝瀹冮潪甯哥伒媧伙紝鍩烘湰婊¤凍views鐨勯渶瑕侊紝鏃犺鏁版嵁鐢ㄤ互涓嬩換浣曟牱鐨勫艦寮?br>琛ㄧ幇錛屽tables,lists,trees銆傜劧鑰岋紝褰撲綘閲嶆柊瀹炵幇涓涓猰odel鏃訛紝濡傛灉瀹冨熀浜巘able鎴杔ist褰㈠紡鐨勬暟鎹粨鏋勶紝鏈濂戒粠QAbstractListModel,QAbstractTableModel寮濮嬪仛璧鳳紝鍥犱負(fù)瀹冧滑鎻愪緵浜?jiǎn)閫傚綋鐨勫父瑙勫姛鑳界殑緙虹渷瀹炵幇銆傝繖浜涚被鍙互琚瓙綾誨寲浠ユ敮鎸佺壒孌婄殑瀹氬埗闇姹傘傚瓙綾誨寲model鐨勮繃紼嬪湪Create New Model閮ㄥ垎璁ㄨ
QT鎻愪緵浜?jiǎn)涓浜涚幇鎴愮殑models鐢ㄤ簬澶勭悊鏁版嵁欏癸細(xì)
QStringListModel 鐢ㄤ簬瀛樺偍綆鍗曠殑QString鍒楄〃銆?br>QStandardItemModel 綆＄悊澶嶆潅鐨勬爲(wèi)鍨嬬粨鏋勬暟鎹」錛屾瘡欏歸兘鍙互鍖呭惈浠繪剰鏁版嵁銆?br>QDirModel 鎻愪緵鏈湴鏂囦歡緋葷粺涓殑鏂囦歡涓庣洰褰曚俊鎭?br>QSqlQueryModel, QSqlTableModel,QSqlRelationTableModel鐢ㄦ潵璁塊棶鏁版嵁搴撱?br>鍋囧榪欎簺鏍囧噯Model涓嶆弧瓚充綘鐨勯渶瑕侊紝浣犲簲璇ュ瓙綾誨寲QAbstractItemModel,QAbstractListModel鎴栨槸
QAbstractTableModel鏉ュ畾鍒躲?/p>
Views
涓嶅悓鐨剉iew閮藉畬鏁村疄鐜頒簡(jiǎn)鍚勮嚜鐨勫姛鑳斤細(xì)QListView鎶婃暟鎹樉紺轟負(fù)涓涓垪琛紝QTableView鎶奙odel 涓殑鏁版嵁浠able鐨勫艦寮忚〃鐜幫紝QTreeView 鐢ㄥ叿鏈夊眰嬈＄粨鏋勭殑鍒楄〃鏉ユ樉紺簃odel涓殑鏁版嵁銆傝繖浜涚被閮藉熀浜?span style="COLOR: #0000ff">QAbstractItemView鎶借薄鍩虹被錛屽敖綆¤繖浜涚被閮芥槸鐜版垚鐨勶紝瀹屾暣鐨勮繘琛屼簡(jiǎn)瀹炵幇錛屼絾瀹冧滑閮藉彲浠ョ敤浜庡瓙綾誨寲浠ヤ究婊¤凍瀹氬埗闇姹傘?/p>
Delegates
QAbstractItemDelegate 鏄痬odel/view鏋舵瀯涓殑鐢ㄤ簬delegate鐨勬娊璞″熀綾匯傜己鐪佺殑delegate瀹炵幇鍦?span style="COLOR: #0000ff">QItemDelegate綾諱腑鎻愪緵銆傚畠鍙互鐢ㄤ簬Qt鏍囧噯views鐨勭己鐪?delegate.
鎺掑簭
鍦╩odel/view鏋舵瀯涓紝鏈変袱縐嶆柟娉曡繘琛屾帓搴忥紝閫夋嫨鍝鏂規(guī)硶渚濊禆浜庝綘鐨勫簳灞侻odel銆?br>鍋囧浣犵殑model鏄彲鎺掑簭鐨勶紝涔熷氨鏄畠閲嶆柊瀹炵幇浜?span style="COLOR: #0000ff">QAbstractItemModel::sort()鍑芥暟錛?span style="COLOR: #0000ff">QTableView涓?span style="COLOR: #0000ff">QTreeView閮芥彁渚涗簡(jiǎn)API,鍏佽浣犱互緙栫▼鐨勬柟寮忓Model鏁版嵁榪涜鎺掑簭銆傚彟澶栵紝浣犱篃鍙互榪涜浜や簰鏂瑰紡涓嬬殑鎺掑簭錛堜緥濡傦紝鍏佽鐢ㄦ埛閫氳繃鐐瑰嚮view琛ㄥご鐨勬柟寮忓鏁版嵁榪涜鎺掑簭錛夛紝鍙互榪欐牱鍋氾細(xì)鎶?span style="COLOR: #0000ff">QHeaderView::sectionClicked()淇″彿涓嶲TableView::sortByColum()妲芥垨QTreeView::sortByColumn()妲借繘琛岃仈緇撳氨濂戒簡(jiǎn)銆?br>鍙︿竴縐嶆柟娉曟槸錛屽亣濡備綘鐨刴odel娌℃湁鎻愪緵闇瑕佺殑鎺ュ彛鎴栨槸浣犳兂鐢╨ist view琛ㄧず鏁版嵁錛屽彲浠ョ敤涓涓唬鐞?br>model鍦ㄧ敤view琛ㄧず鏁版嵁涔嬪墠瀵逛綘鐨刴odel鏁版嵁緇撴瀯榪涜杞崲銆?/p>
渚垮埄綾?/span>
璁稿渚垮埄綾婚兘婧愪簬鏍囧噯鐨剉iew綾伙紝瀹冧滑鏂逛究浜?jiǎn)閭ｄ簺鋴社敤Qt涓熀浜庨」鐨剉iew涓巘able綾伙紝瀹冧滑涓嶅簲璇ヨ瀛愮被鍖栵紝
瀹冧滑鍙槸涓篞t 3鐨勭瓑浠風(fēng)被鎻愪緵涓涓啛鎮(zhèn)夌殑鎺ュ彛銆傝繖浜涚被鏈?span style="COLOR: #0000ff">QListWidget,QTreeWidget,QTableWidget,瀹冧滑鎻愪緵浜?jiǎn)濡俀t 3涓殑QListBox, QlistView,QTable鐩鎬技鐨勮涓恒傝繖浜涚被姣擵iew綾葷己灝戠伒媧繪э紝涓嶈兘鐢ㄤ簬浠繪剰鐨刴odels,鎺ㄤ粙浣跨敤model/view鐨勬柟娉曞鐞嗘暟鎹?/p>
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浣滆咃細(xì) Jasmin Blanchette 璇戯細(xì)娓呮簮娓告皯 gameogre@gmail.com
浠涔堟槸鑷彂浜嬩歡錛熷摢浜涚被鍨嬬殑浜嬩歡鍙互琚玴ropagated 鎴朿ompressed? posting and sending 浜嬩歡涔嬮棿鏈変綍涓嶅悓錛熶粈涔堟椂鍊欏簲璇ヨ皟鐢?accept() 鎴栨槸ignore() ? 濡傛灉榪欎簺闂?shù)綘杩樹(shù)笉鏄緢浜?jiǎn)瑙ｏ紝閭ｄ箞緇х畫(huà)鐪嬩笅鍘匯?/p>
浜嬩歡璧鋒簮錛?/span>
鍩轟簬浜嬩歡濡備綍琚駭鐢熶笌鍒嗗彂錛屽彲浠ユ妸浜嬩歡鍒嗕負(fù)涓夌被錛?br>* Spontaneous 浜嬩歡,鐢辯獥鍙ｇ郴緇熶駭鐢燂紝瀹冧滑琚斁鍒扮郴緇熼槦鍒椾腑錛岄氳繃浜嬩歡寰幆閫愪釜澶勭悊銆?br>* Posted 浜嬩歡錛岀敱Qt鎴栨槸搴旂敤紼嬪簭浜х敓錛屽畠浠Qt緇勬垚闃熷垪錛屽啀閫氳繃浜嬩歡寰幆澶勭悊銆?br>* Sent 浜嬩歡錛岀敱Qt鎴栨槸搴旂敤紼嬪簭浜х敓錛屼絾瀹冧滑琚洿鎺ュ彂閫佸埌鐩爣瀵硅薄銆?br>褰撴垜浠湪main()鍑芥暟鐨勬湯灝捐皟鐢?span style="COLOR: #0000ff">QApplication::exec()鏃?紼嬪簭榪涘叆浜?jiǎn)Qt鐨勪簨浠跺驚鐜紝澶ф鏉ヨ錛屼簨浠跺驚鐜涓嬮潰鎵紺猴細(xì)
while (!exit_was_called)
{
while(!posted_event_queue_is_empty)
{
process_next_posted_event();
}
while(!spontaneous_event_queue_is_empty)
{
process_next_spontaneous_event();
}
while(!posted_event_queue_is_empty)
{
process_next_posted_event();
}
}
棣栧厛錛屼簨浠跺驚鐜鐞嗘墍鏈夌殑posted浜嬩歡錛岀洿鍒伴槦鍒楃┖銆傜劧鍚庡啀澶勭悊鎵鏈夌殑spontaneous浜嬩歡錛屾渶鍚庡畠澶勭悊鎵鏈夌殑鍥犱負(fù)澶勭悊spontaneous浜嬩歡鑰屼駭鐢熺殑posted浜嬩歡銆俿end 浜嬩歡騫朵笉鍦ㄤ簨浠跺驚鐜唴澶勭悊錛屽畠浠兘鐩存帴琚彂閫佸埌浜?jiǎn)鐩爣瀵硅薄銆傜幇鍦ㄧ湅涓涓嬪疄璺典腑鐨刾aint 浜嬩歡鏄浣曞伐浣滅殑銆傚綋涓涓獁idget絎竴嬈″彲瑙侊紝鎴栨槸琚伄鎸″悗鍐嶆鍙樹(shù)負(fù)鍙錛?br>紿楀彛緋葷粺浜х敓涓涓?spontaneous) paint浜嬩歡錛岃姹傜▼搴忛噸鐢粀idget,浜嬩歡寰幆鏈緇堜粠浜嬩歡闃熷垪涓崱閫夎繖涓簨浠跺茍鎶婂畠鍒嗗彂鍒伴偅涓渶瑕侀噸鐢葷殑widget銆?br>騫朵笉鏄墍鏈夌殑paint浜嬩歡閮芥槸鐢辯獥鍙ｇ郴緇熶駭鐢熺殑銆傚綋浣犺皟鐢?span style="COLOR: #0000ff">QWidget::update()鍘誨己琛岄噸鐢粀idget,榪欎釜widget浼?xì)post 涓涓猵aint 浜嬩歡緇欒嚜宸便傝繖涓猵aint浜嬩歡琚斁鍏ラ槦鍒楋紝鏈緇堣浜嬩歡寰幆鍒嗗彂涔嬨?br>鍋囧浣犲緢涓嶈愮儲(chǔ)錛岀瓑涓嶅強(qiáng)浜嬩歡寰幆鍘婚噸鐢諱竴涓獁idget, 鐞嗚涓婏紝浣犲簲璇ョ洿鎺ヨ皟鐢╬aintEvent()寮哄埗榪涜绔嬪嵆鐨勯噸鐢匯備絾瀹為檯涓婅繖涓嶆繪槸鍙鐨勶紝鍥犱負(fù)paintEvent()鍑芥暟鏄痯rotected鐨勶紙寰堝彲鑳借闂笉浜?jiǎn)锛?jí)銆傚畠涔熺粫寮浜?jiǎn)鋼Q浣曞瓨鍦ㄧ殑浜嬩歡榪囨護(hù)鍣ㄣ傚洜涓鴻繖浜涘師鍥狅紝Qt鎻愪緵浜?jiǎn)涓涓満鍒訛紝鐩存帴sending浜嬩歡鑰屼笉鏄痯osting 銆?br>QWidget::repaint()灝變嬌鐢ㄤ簡(jiǎn)榪欎釜鏈哄埗鏉ュ己鍒惰繘琛岀珛鍗抽噸鐢匯?br>posting 鐩稿浜巗ending鐨勪竴涓紭鍔挎槸錛屽畠緇欎簡(jiǎn)Qt涓涓帇緙?compress)浜嬩歡鐨勬満浼?xì)銆傚亣濡備綘鍦ㄤ竴涓獁idget涓婅繛緇湴璋冪敤update() 鍗佹錛屽洜update()鑰屼駭鐢熺殑榪欏崄涓簨浠訛紝灝嗕細(xì)鑷姩鍦拌鍚堝茍涓轟竴涓崟鐙殑浜嬩歡錛屼絾鏄?span style="COLOR: #0000ff">QPaintEvents浜嬩歡闄勫甫鐨勫尯鍩熶俊鎭篃鍚堝茍浜?jiǎn)銆傚彲鍘嬬緝鐨勪簨浠剁被鍨嬪寘鎷細(xì)paint,move,resize,layout hint,language change銆?br>鏈鍚庤娉ㄦ剰錛屼綘鍙互鍦ㄤ換浣曟椂鍊欒皟鐢?span style="COLOR: #0000ff">QApplication::sendPostedEvent()錛屽己鍒禥t浜х敓涓涓璞＄殑posted浜嬩歡銆?/p>
浜哄伐鍚堟垚鐨勪簨浠?br>
QT搴旂敤紼嬪簭鍙互浜х敓浠栦滑鑷繁鐨勪簨浠訛紝鎴栨槸棰勫畾涔夌被鍨嬶紝鎴栨槸鑷畾涔夌被鍨嬨?榪欏彲浠ラ氳繃鍒涘緩QEvent綾繪垨瀹冪殑
瀛愮被鐨勫疄渚嬶紝騫朵笖璋冪敤QApplication:postEvent()鎴?span style="COLOR: #0000ff">QApplication::sendEvent()鏉ュ疄鐜般?br>榪欎袱涓嚱鏁伴渶瑕佷竴涓?QObject* 涓庝竴涓猀Event * 浣滀負(fù)鍙傛暟錛屽亣濡備綘璋冪敤postEvent(),浣犲繀欏葷敤 new 鎿嶄綔絎︽潵鍒涘緩浜嬩歡瀵硅薄錛孮t浼?xì)瀹冭澶勭悊鍚庡府浣犲垹闄ゅ畠銆傚亣濡備綘鐢╯endEvent(), 浣犲簲璇ュ湪鏍堜笂鏉ュ垱寤轟簨浠躲備笅闈婦涓や釜渚嬪瓙錛?br>涓鏄痯osting 浜嬩歡錛?br>QApplication::postEvent(mainWin, new QKeyEvent(QEvent::KeyPress,Key_X,'X',0));
浜屾槸sending 浜嬩歡錛?br> QKeyEvent event(QEvent::KeyPress, Key_X, 'X', 0);
QApplication::sendEvent(mainWin, &event);
Qt搴旂敤紼嬪簭寰堝皯鐩存帴璋冪敤postEvent()鎴栨槸sendEvnet()錛屽洜涓哄ぇ澶氭暟浜嬩歡浼?xì)鍦ㄥ繀瑕佹椂琚玅t鎴栨槸紿楀彛緋葷粺鑷姩浜х敓
銆傚湪澶у鏁扮殑鎯呭喌涓嬶紝褰撲綘鎯沖彂閫佷竴涓簨浠舵椂錛孮t宸茬粡涓轟簡(jiǎn)鍑嗗濂戒簡(jiǎn)涓涓洿楂樼駭鐨勫嚱鏁版潵涓轟綘鏈嶅姟銆傦紙渚嬪
update()涓巖epaint())銆?/p>
瀹氬埗浜嬩歡綾誨瀷
qt鍏佽浣犲垱寤鴻嚜宸辯殑浜嬩歡綾誨瀷錛岃繖鍦ㄥ綰跨▼鐨勭▼搴忎腑灝ゅ叾鏈夌敤銆傚湪鍗曠嚎紼嬬殑紼嬪簭涔熺浉褰撴湁鐢紝瀹冨彲浠ヤ綔涓?br>瀵硅薄闂寸殑涓縐嶉氳鏈哄埗銆備負(fù)浠涔堜綘搴旇鐢ㄤ簨浠惰屼笉鏄叾浠栫殑鏍囧噯鍑芥暟璋冪敤錛屾垨淇″彿銆佹Ы鐨勪富瑕佸師鍥犳槸錛氫簨浠舵棦鍙敤浜庡悓姝ヤ篃鍙敤浜庡紓姝ワ紙渚濊禆浜庝綘鏄皟鐢╯endEvent()鎴栨槸postEvents()),鍑芥暟璋冪敤鎴栨槸妲借皟鐢ㄦ繪槸鍚屾鐨勩備簨浠剁殑鍙﹀涓涓ソ澶勬槸瀹冨彲浠ヨ榪囨護(hù)銆?br>婕旂ず濡備綍post涓涓畾鍒朵簨浠剁殑浠ｇ爜鐗囨錛?br>const QEvent::Type MyEvent = (QEvent::Type)1234;
...
QApplication::postEvent(obj, new QCustomEvent(MyEvent));
浜嬩歡蹇呴』鏄疩CustomEvent綾誨瀷(鎴栧瓙綾伙級(jí)鐨勩傛瀯閫犲嚱鏁扮殑鍙傛暟鏄簨浠剁殑綾誨瀷錛?024浠ヤ笅琚玅t淇濈暀銆傚叾浠栧彲琚▼搴忎嬌鐢ㄣ備負(fù)澶勭悊瀹氬埗浜嬩歡綾誨瀷錛岃閲嶆柊瀹炵幇customEvent()鍑芥暟錛?br>void MyLineEdit::customEvent(QCustomEvent *event)
{
if (event->type() == MyEvent) {
myEvent();
} else {
QLineEdit::customEvent(event);
}
}
QcustomEvent綾繪湁涓涓獀oid *鐨勬垚鍛橈紝鍙敤浜庣壒瀹氱殑鐩殑銆備綘涔熷彲浠ュ瓙綾誨寲QCustomEvent錛屽姞涓婂埆鐨勬垚鍛橈紝浣嗘槸浣犱篃闇瑕佸湪customEvent()涓漿鎹?span style="COLOR: #0000ff">QCustomeEvent鍒頒綘鐗規(guī)湁鐨勭被鍨嬨?/p>
浜嬩歡澶勭悊涓庤繃婊?br>
Qt涓殑浜嬩歡鍙互鍦ㄤ簲涓笉鍚岀殑灞傛涓婅澶勭悊
1,閲嶆柊瀹炵幇涓涓壒瀹氱殑浜嬩歡handler
QObject涓?span style="COLOR: #0000ff">QWidget鎻愪緵浜?jiǎn)璁稿鐗瑰畾鐨勪簨錃ghandlers錛屽垎鍒搴斾簬涓嶅悓鐨勪簨浠剁被鍨嬨傦紙濡俻aintEvent()瀵瑰簲paint浜嬩歡錛?br>2,閲嶆柊瀹炵幇QObject::event()
event()鍑芥暟鏄墍鏈夊璞′簨浠剁殑鍏ュ彛錛孮Object鍜孮Widget涓己鐪佺殑瀹炵幇鏄畝鍗曞湴鎶婁簨浠舵帹鍏ョ壒瀹氱殑浜嬩歡handlers銆?br>3,鍦?span style="COLOR: #0000ff">QObject瀹夎涓婁簨浠惰繃婊ゅ櫒
浜嬩歡榪囨護(hù)鍣ㄦ槸涓涓璞★紝瀹冩帴鏀跺埆鐨勫璞＄殑浜嬩歡錛屽湪榪欎簺浜嬩歡鍒拌揪鎸囧畾鐩爣涔嬮棿銆?br>4錛屽湪aApp涓婂畨瑁呬竴涓簨浠惰繃婊ゅ櫒錛屽畠浼?xì)鐩戣绋嬪簭涓彂閫佸埌鎵鏈夊璞＄殑鎵鏈変簨浠?br>5,閲嶆柊瀹炵幇QApplication:notify(),Qt鐨勪簨浠跺驚鐜笌sendEvent()璋冪敤榪欎釜鍑芥暟鏉ュ垎鍙戜簨浠訛紝閫氳繃閲嶅啓瀹冿紝浣犲彲浠ュ湪鍒漢涔嬪墠鐪嬪埌浜嬩歡銆?/p>
涓浜涗簨浠剁被鍨嬪彲浠ヨ浼犻掋傝繖鎰忓懗鐫鍋囧鐩爣瀵硅薄涓嶅鐞嗕竴涓簨浠訛紝Qt浼?xì)璇曠潃瀵繪壘鍙﹀鐨勪簨浠舵帴鏀惰呫傜敤鏂扮殑鐩爣鏉ヨ皟鐢?span style="COLOR: #0000ff">QApplication::notify()銆備婦渚嬫潵璁詫紝key浜嬩歡鏄紶閫掔殑錛屽亣濡傛嫢鏈夌劍鐐圭殑Widget涓嶅鐞嗙壒瀹氶敭錛孮t浼?xì)鍒嗗彂鐩稿悓鐨勪簨錃g緇欑埗widget,鐒跺悗鏄埗浜茬殑鐖朵翰錛岀洿鍒版渶欏跺眰widget銆?/p>
鎺ュ彈鎴栨槸蹇界暐錛?br>
鍙浼犻掔殑浜嬩歡鏈変竴涓猘ccept()鍑芥暟鍜屼竴涓猧gnore()鍑芥暟錛屼綘鍙互鐢ㄥ畠浠潵鍛婅瘔Qt錛屼綘“鎺ユ敹”鎴栨槸
“蹇界暐”榪欎釜浜嬩歡銆傚亣濡備簨浠秇andler璋冪敤accept(),榪欎釜浜嬩歡灝嗕笉浼?xì)鍐嶈浼犻掋傚亣濡備簨浠秇andler璋冪敤
ignore(),Qt浼?xì)璇曠潃鏌ユ壘鍙﹀鐨勪簨浠舵帴鏀惰呫?br>鍍忓ぇ澶氭暟鐨勫紑鍙戣呬竴鏍鳳紝浣犲彲鑳戒笉浼?xì)琚皟鐢╝ccept()鎴栨槸ignore()鎵鐑?chǔ)鎭笺傜己鐪佹儏鍐典笅鏄?#8220;鎺ユ敹”錛屽湪
QWidget涓殑緙虹渷瀹炵幇鏄皟鐢╥gnore(),鍋囧浣犲笇鏈涙帴鏀朵簨浠訛紝浣犻渶瑕佸仛鐨勬槸閲嶆柊瀹炵幇浜嬩歡handler錛岄伩鍏?br>璋冪敤QWidget鐨勫疄鐜般傚亣濡備綘鎯?#8220;蹇界暐”浜嬩歡錛屽彧闇綆鍗曞湴浼犻掑畠鍒癚Widget鐨勫疄鐜般備笅闈㈢殑浠ｇ爜婕旂ず浜?jiǎn)杩欎竴鐐癸細(xì)
void MyFancyWidget::keyPressEvent(QKeyEvent *event)
{
if (event->key() == Key_Escape) {
doEscape();
} else {
QWidget::keyPressEvent(event);
}
}
鍦ㄤ笂闈㈢殑渚嬪瓙閲岋紝鍋囧鐢ㄦ埛鎸変簡(jiǎn)"ESC"閿紝鎴戜滑浼?xì)璋冪敤doEscape()騫朵笖浜嬩歡琚?#8220;鎺ユ敹”浜?jiǎn)锛垬q欐槸緙虹渷鐨勬儏鍐碉級(jí)錛?br>浜嬩歡涓嶄細(xì)琚紶閫掑埌鐖秝idget,鍋囧鐢ㄦ埛鎸変簡(jiǎn)鍒殑閿紝鍒欒皟鐢≦Widget鐨勭己鐪佸疄鐜般?br>void QWidget::keyPressEvent(QKeyEvent *event)
{
event->ignore();
}
搴旇鎰熻阿ignore()錛屼簨浠朵細(xì)琚紶閫掑埌鐖秝idget涓幓銆?br>璁ㄨ鍒扮洰鍓嶄負(fù)鑷籌紝鎴戜滑閮藉亣璁懼熀綾繪槸QWidget,鐒惰岋紝鍚屾牱鐨勮鍒欎篃鍙互搴旂敤鍒板埆鐨勫眰嬈′腑錛屽彧瑕佺敤QWidget
浠ｆ浛鍩虹被鍗沖彲銆備婦渚嬫潵璇達(dá)細(xì)
void MyFancyLineEdit::keyPressEvent(QKeyEvent *event)
{
if (event->key() == Key_SysReq) {
doSystemRequest();
} else {
QLineEdit::keyPressEvent(event);
}
}
鐢變簬鏌愪簺鍘熷洜錛屼綘浼?xì)鍦╡vent()涓鐞嗕簨浠訛紝鑰屼笉鏄湪鐗瑰畾鐨刪andler涓紝濡俴eyPressEvent(),榪欎釜榪囩▼浼?xì)鏈変簺涓嶅悓銆俥vent()浼?xì)杩斿洖涓涓竷?yōu)當(dāng)鍊鹼紝鏉ュ憡璇夎皟鐢ㄨ呮槸鍚︿簨浠惰accept鎴杋gnore,(true琛ㄧずaccept),浠巈vent()涓皟鐢╝ccept()鎴栨槸ignore()鏄病鏈夋剰涔夌殑銆?#8220;Accept”鏍囪鏄痚vent()涓庣壒瀹氫簨浠秇andler涔嬮棿鐨勪竴縐嶉氳鏈哄埗銆傝屼粠event()榪斿洖鐨勫竷?yōu)當(dāng)鍊煎嵈鏄敤鏉ヤ笌QApplication:notify()閫氳鐨勩傚湪QWidgetk涓己鐪佺殑event()瀹炵幇鏄漿鎹?#8220;Accept”鏍囪涓轟竴涓竷?yōu)當(dāng)鍊鹼紝濡備笅鎵紺猴細(xì)
bool QWidget::event(QEvent *event)
{
switch (e->type()) {
case QEvent::KeyPress:
keyPressEvent((QKeyEvent *)event);
if (!((QKeyEvent *)event)->isAccepted())
return false;
break;
case QEvent::KeyRelease:
keyReleaseEvent((QKeyEvent *)event);
if (!((QKeyEvent *)event)->isAccepted())
return false;
break;
...
}
return true;
}
鍒扮幇鍦ㄤ負(fù)鑷籌紝鎴戜滑鎵璇寸殑鍐呭涓嶄粎浠呴傜敤浜巏ey浜嬩歡錛屼篃閫傜敤浜巑ouse,wheel,tablet,context menu絳変簨浠?br>Close浜嬩歡鏈夌偣涓嶅悓錛岃皟鐢?span style="COLOR: #0000ff">QCloseEvent:ignore()鍙栨秷浜?jiǎn)鍏抽棴鎿嶄綔锛岃宎ccept()鍛婅瘔Qt緇х畫(huà)鎵ц姝ｅ父鐨勫叧闂搷浣溿備負(fù)浜?jiǎn)閬垮厤尕滀贡锛屾渶濂芥槸鍦╟loseEvent()鐨勬柊瀹炵幇涓槑紜湴榪涜accept()涓巌gnore()鐨勮皟鐢細(xì)
void MainWindow::closeEvent(QCloseEvent *event)
{
if (userReallyWantsToQuit()) {
event->accept();
} else {
event->ignore();
}
}
]]>
]]>
2, 鍙栧緱Win32涓嬬殑琛ヤ竵download
3, 灝嗕袱涓枃浠惰В鍘嬪埌鐩稿悓鐩綍錛屽D:\Qt4
4, 鎵撳紑VS2003鍛戒護(hù)琛岀獥鍙?榪欒嚜鍔ㄥ鐜鍙橀噺榪涜浜?jiǎn)璁揪|?br>5,浠庡懡浠よ紿楀彛榪涘叆D:Qt4, 鎵цinstallpatch42.bat 錛岃繖鏄粠琛ヤ竵瑙ｅ帇寰楀埌鐨勬枃浠朵箣涓銆?br>6, 鎵ц qconfigure.bat msvc.net
7,鎻愮ず鍗忚淇℃伅錛?絳夊緟鍝嶅簲錛岄敭鍏?Y'
8,鍙堟彁紺猴紝閿叆'y'
9鍙兘鍙堜竴涓彁紺?閿叆'y'
10,鍑虹幇綾諱技浠ヤ笅鎻愮ず:
==================================================== You are now ready to build Qt If you specified -static, type 'nmake sub-src' otherwise, type 'nmake' To start over, type 'nmake distclean' and then re-run qconfigure.bat ====================================================
11, 鎵ц nmake
12,緙栬瘧緇撴潫鍚庯紝璁劇疆鏈哄櫒鐨勭幆澧冨彉閲?path 錛?娣誨姞璺緞 D:\Qt4\bin , 鍒涘緩鏂扮殑鍙橀噺錛?/font>QMAKESPEC錛?font color=#000000>鍊間負(fù)win32-msvc.net
13,鏂板緩涓涓枃浠秇ello.cpp,鍐呭濡備笅(寮濮嬫祴璇曟槸鍚﹀畨瑁呭ソ浜?
#include <QApplication>
#include <QLabel>
int main(int argc, char **argv) {
QApplication app(argc, argv);
QLabel *label = new QLabel("Hello World!");
label->show();
return app.exec();
}
14錛屽湪VS2003鍛戒護(hù)紿楀彛涓嬶紝榪涘叆cpp鏂囦歡鎵鍦ㄧ洰褰曪紝濡侱:\test
15,qmake -project -t vcapp -o projectname.pro
16,鍐嶆潵涓嬈★紝涓嶅甫鍙傛暟 qmake
17,褰撳墠鐩綍涓嬬敓鎴愪簡(jiǎn)VS宸ョ▼鏂囦歡錛?tt>projectname.vcproj
18,鐢╒S2003灝?姝ゅ伐紼嬫墦寮錛岀紪璇戯紝榪愯銆?br>
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