柚子快報激活碼778899分享：開發(fā)語言 qt做的分頁控件

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介紹

qt做的分頁控件

如何使用

創(chuàng)建

Pagination必須基于一個QWidget創(chuàng)建，否則會引發(fā)錯誤。

Pagination* pa = new Pagination(QWidget*);

設(shè)置總頁數(shù)

Pagination需要設(shè)置一個總的頁數(shù)，來初始化頁碼。

pa->SetTotalItem(count);

設(shè)置可選的每頁數(shù)量

可以通過傳給Pagination一個整形數(shù)組，來設(shè)置每頁顯示的條目數(shù)。

int args[4] = {1, 100, 200, 300};

pa->SetItemPerPage(args, 4);

刷新配置參數(shù)

當(dāng)上面參數(shù)設(shè)置完成后，需要調(diào)用一次Refresh來刷新配置。

pa->Refresh();

獲取當(dāng)前頁數(shù)的變化

當(dāng)Pagination當(dāng)前的頁碼發(fā)生變化時，會產(chǎn)生一個PageChanged信號，原型如下：

void PageChanged(int nPage);

其中，nPage代表要跳轉(zhuǎn)的頁數(shù)。

獲取每頁條目數(shù)的變化

當(dāng)Pagination的每頁數(shù)量發(fā)生變化時，會產(chǎn)生一個NumberPerPageChanged信號，原型如下：

void NumberPerPageChanged(int nCount);

其中，nCount表示最新的每頁條目數(shù)量。

#include "pagination.h"

#include

#include

#include

#include

//q:303103757 and v:qt5_qt6

Pagination::Pagination(QWidget *parent) :

QWidget(parent),

m_nCurrentPage(MINIMUM_PAGE),

m_nMaxPage(MINIMUM_PAGE),

m_nDisplayPage(0)

{

setMinimumSize(800, 50);

Init();

}

Pagination::~Pagination()

{

if(m_pHPageLayout)

{

delete m_pHPageLayout;

m_pHPageLayout = nullptr;

}

}

void Pagination::SetTotalItem(int nTotal)

{

m_pTotalItem->SetTotal(nTotal);

int EachPage = m_pItemEachPage->GetCurrent();

if(EachPage > 0)

{

m_nMaxPage = nTotal / EachPage;

if(nTotal % EachPage > 0) ++m_nMaxPage;

if(m_nMaxPage <= 0) m_nMaxPage = MINIMUM_PAGE;

// 如果m_nMaxPage大于MAX_BUTTON_COUNT，則只構(gòu)建7個按鈕，頭、尾，中間5個

if(m_nMaxPage > MAX_BUTTON_COUNT) m_nDisplayPage = MAX_BUTTON_COUNT + 1;

else m_nDisplayPage = m_nMaxPage;

}

}

void Pagination::SetItemPerPage(int *args, int size)

{

m_pItemEachPage->SetItemEachPage(args, size);

int EachPage = m_pItemEachPage->GetCurrent();

if(EachPage > 0)

{

int nTotal = m_pTotalItem->GetTotal();

m_nMaxPage = nTotal / EachPage;

if(nTotal % EachPage > 0) ++m_nMaxPage;

if(m_nMaxPage <= 0) m_nMaxPage = MINIMUM_PAGE;

// 如果m_nMaxPage小于MAX_BUTTON_COUNT，則不變。

// 如果m_nMaxPage大于MAX_BUTTON_COUNT，則只構(gòu)建7個按鈕，頭、尾，中間5個

if(m_nMaxPage > MAX_BUTTON_COUNT) m_nDisplayPage = MAX_BUTTON_COUNT + 1;

else m_nDisplayPage = m_nMaxPage;

}

}

void Pagination::Refresh()

{

Reload();

}

void Pagination::ChangeView(int currentPage)

{

/****************************************************************

* 改變頁數(shù)的幾種情形

* 1、顯示頁數(shù)（m_nDisplay）小于等于MAX_BUTTON_COUNT，則該函數(shù)不做任何處理。

* 2、顯示頁數(shù)（m_nDisplay）大于MAX_BUTTON_COUNT，開始處理

* (1).初始(currentPage < MAX_BUTTON_COUNT).

* ① currentPage != 5, [1] 2 3 4 5 6 ... max

* ② currentPage == 5, 此時應(yīng)當(dāng)放到(2)去處理，因為此時已經(jīng)形成 1 ... 3 4 [5]的情況

* (2).(currentPage >= MAX_BUTTON_COUNT)。

* ① 兩個省略號中間(currentPage < max - 3)：1 ... 3 4 [5] 6 7 ... max

* ② 后省略號后面(currentPage >= max - 3)： 1 ... 4 5 [6] 7 8 max

* ***************************************************************/

if(currentPage == MINIMUM_PAGE)

m_pBtnLeft->setDisabled(true); // 當(dāng)前第一頁，禁用左按鈕

else

m_pBtnLeft->setDisabled(false); // 開啟右按鈕

if(currentPage == m_nMaxPage)

m_pBtnRight->setDisabled(true); // 最后一頁，禁用右按鈕

else

m_pBtnRight->setDisabled(false); // 開啟左按鈕

if(m_nDisplayPage <= MAX_BUTTON_COUNT)

return; // 1情況

if(currentPage < MAX_BUTTON_COUNT && currentPage != MAX_BUTTON_COUNT - 1) // 2.1情況

{

// 頁面情況 1 2 3 4 5 6 ... max

for(unsigned long long i = 0; i < m_vecPageBtn.size(); i++)

{

QPushButton* btn = m_vecPageBtn[i];

if(btn->isHidden()) btn->show();

if(i == m_vecPageBtn.size() - 1)

btn->setText(QString::number(m_nMaxPage));

else

btn->setText(QString::number(i + 1));

btn->adjustSize();

if(btn->text().toInt() == currentPage)

btn->setChecked(true);

else

btn->setChecked(false);

}

// 顯示后省略號，屏蔽前省略

if(!m_pBtnOmitFront->isHidden())

m_pBtnOmitFront->hide();

if(m_pBtnOmitBack->isHidden())

m_pBtnOmitBack->show();

}

else

{

if(currentPage < m_nMaxPage - 3) // 2.2.1情況

{

// 頁面情況 currentPage - 2, currentPage - 1, [currentPage], currentPage + 1, currentPage + 2

int value = - 2;

for(unsigned long long i = 1; i <= 5; i++)

{

QPushButton* btn = m_vecPageBtn[i];

btn->setText(QString::number(currentPage + value++));

btn->adjustSize();

if(btn->text().toInt() == currentPage) btn->setChecked(true);

else btn->setChecked(false);

}

// 開啟兩邊省略號

if(m_pBtnOmitFront->isHidden()) m_pBtnOmitFront->show();

if(m_pBtnOmitBack->isHidden()) m_pBtnOmitBack->show();

}

else // 2.2.2情況

{

// 頁面情況 1 ... max - 5, max - 4, [max - 3], max - 2, max - 1, max

// 除了第一個不變，其它全變

for(unsigned long long i = 1; i < m_vecPageBtn.size(); i++)

{

QPushButton* btn = m_vecPageBtn[i];

btn->setText(QString::number(m_nMaxPage - MAX_BUTTON_COUNT + i));

btn->adjustSize();

if(btn->text().toInt() == currentPage) btn->setChecked(true);

else btn->setChecked(false);

}

// 顯示前省略號，屏蔽后省略

if(m_pBtnOmitFront->isHidden()) m_pBtnOmitFront->show();

if(!m_pBtnOmitBack->isHidden()) m_pBtnOmitBack->hide();

}

}

}

QPushButton *Pagination::GetPageItem(int nPos)

{

return dynamic_cast(m_pHPageLayout->itemAt(nPos)->widget());

}

void Pagination::Init()

{

setObjectName("pagination");

setStyleSheet(QStringLiteral("QWidget#pagination{background-color:transparent;}"));

m_pHMainLayout = new QHBoxLayout(this);

m_pHPageLayout = new QHBoxLayout;

m_pTotalItem = new TotalItem(this);

m_pItemEachPage = new EachPageItem(this);

m_pGotoItem = new GotoPageItem(this);

m_pBtnLeft = new QPushButton("<", this);

m_pBtnRight = new QPushButton(">", this);

m_pBtnOmitFront = new QPushButton(this);

m_pBtnOmitBack = new QPushButton(this);

m_vecPageBtn.reserve(10);

m_pBtnOmitFront->setStyleSheet(QStringLiteral("QPushButton{border:none;background-color:transparent;background:url(:/pagination/skin/ellipsis.png) no-repeat;background-position:center;}"

"QPushButton:hover{background:url(:/pagination/skin/FB.png) no-repeat;background-position:center;}"));

m_pBtnOmitBack->setStyleSheet(QStringLiteral("QPushButton{border:none;background-color:transparent;background:url(:/pagination/skin/ellipsis.png) no-repeat;background-position:center;}"

"QPushButton:hover{background:url(:/pagination/skin/FF.png) no-repeat;background-position:center;}"));

m_nCurrentPage = 1;

int args[4] = { 100, 200, 300, 400 };

SetItemPerPage(args, sizeof (args) / sizeof (int));

m_pBtnOmitFront->hide();

m_pBtnOmitBack->hide();

int btnWidth = 0;

for(int i = 0; i < m_nDisplayPage; i++)

{

if(i == 1) m_pHPageLayout->addWidget(m_pBtnOmitFront);

if(i == m_nMaxPage - 2 && i != 0) m_pHPageLayout->addWidget(m_pBtnOmitBack);

QPushButton* btn = new QPushButton(QString::number(i + 1), this);

btn->setCheckable(true);

m_pHPageLayout->addWidget(btn);

m_vecPageBtn.emplace_back(btn);

connect(btn, &QPushButton::clicked, this, &Pagination::btn_page_clicked);

btnWidth += btn->width();

}

for(auto & x : findChildren())

{

x->setMinimumSize(32, 32);

x->setCursor(QCursor(Qt::PointingHandCursor));

if(x != m_pBtnOmitFront && x != m_pBtnOmitBack)

{

x->setStyleSheet(QStringLiteral("QPushButton{font-size:15px;font-weight:bold;border:none;background-color:transparent;color:black;}"

"QPushButton:hover{color:#409EFF;}"

"QPushButton:pressed{color:#409EFF;}"

"QPushButton:checked{color:#409EFF;}"

"QPushButton:disabled{color:#BCBEC2;}"));

}

}

ChangeView(m_nCurrentPage);

m_pHMainLayout->addWidget(m_pTotalItem);

m_pHMainLayout->addWidget(m_pItemEachPage, Qt::AlignCenter);

m_pHMainLayout->addWidget(m_pBtnLeft);

m_pHMainLayout->addLayout(m_pHPageLayout);

m_pHMainLayout->addWidget(m_pBtnRight);

m_pHMainLayout->addWidget(m_pGotoItem);

m_pHMainLayout->addStretch();

// 上一頁

connect(m_pBtnLeft, &QPushButton::clicked, this, [this](){

if(m_nCurrentPage - 1 < 0) m_nCurrentPage = 1;

else --m_nCurrentPage;

ChangeView(m_nCurrentPage);

emit PageChanged(m_nCurrentPage);

});

// 下一頁

connect(m_pBtnRight, &QPushButton::clicked, this, [&](){

if(m_nCurrentPage + 1 > m_nMaxPage) m_nCurrentPage = m_nMaxPage;

else ++m_nCurrentPage;

ChangeView(m_nCurrentPage);

emit PageChanged(m_nCurrentPage);

});

// 左省略號，當(dāng)作快退，即退m_nDisplay頁

connect(m_pBtnOmitFront, &QPushButton::clicked, this, [&](){

if(m_nCurrentPage - PAGE_STEP < MINIMUM_PAGE) m_nCurrentPage = MINIMUM_PAGE;

else m_nCurrentPage -= PAGE_STEP;

ChangeView(m_nCurrentPage);

emit PageChanged(m_nCurrentPage);

});

// 右省略號，當(dāng)作快進，即進m_nDisplay頁

connect(m_pBtnOmitBack, &QPushButton::clicked, this, [&](){

if(m_nCurrentPage + PAGE_STEP > m_nMaxPage) m_nCurrentPage = m_nMaxPage;

else m_nCurrentPage += PAGE_STEP;

ChangeView(m_nCurrentPage);

emit PageChanged(m_nCurrentPage);

});

// 前往第N頁

connect(m_pGotoItem, &GotoPageItem::GotoPage, this, [&](int nPage){

if(nPage > m_nMaxPage) nPage = m_nMaxPage;

if(nPage < MINIMUM_PAGE) nPage = MINIMUM_PAGE;

if(nPage + 1 > m_nMaxPage) m_nCurrentPage = m_nMaxPage;

else m_nCurrentPage = nPage;

ChangeView(m_nCurrentPage);

emit PageChanged(m_nCurrentPage);

});

// 每頁條碼變化

connect(m_pItemEachPage, &EachPageItem::EachPageItemChanged, this, [&](int nCount){

int EachPage = m_pItemEachPage->GetCurrent();

if(EachPage > 0)

{

int nTotal = m_pTotalItem->GetTotal();

m_nMaxPage = nTotal / EachPage;

if(nTotal % EachPage > 0)

++m_nMaxPage;

if(m_nMaxPage <= 0)

m_nMaxPage = MINIMUM_PAGE;

// 如果m_nMaxPage小于MAX_BUTTON_COUNT，則不變。

// 如果m_nMaxPage大于MAX_BUTTON_COUNT，則只構(gòu)建7個按鈕，頭、尾，中間5個

if(m_nMaxPage > MAX_BUTTON_COUNT)

m_nDisplayPage = MAX_BUTTON_COUNT + 1;

else

m_nDisplayPage = m_nMaxPage;

}

Reload();

emit NumberPerPageChanged(nCount);

});

}

void Pagination::paintEvent(QPaintEvent *event)

{

QStyleOption opt;

opt.init(this);

QPainter p(this);

style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);

QWidget::paintEvent(event);

}

QPushButton *Pagination::FindPage(int nIndex) const

{

for(int i = 0; i < m_pHPageLayout->count(); i++)

{

QLayoutItem* item = m_pHPageLayout->itemAt(i);

if(item)

{

QPushButton* btn = qobject_cast(item->widget());

if(btn && btn->text().compare(QString::number(nIndex)) == 0)

{

return btn;

}

}

}

return nullptr;

}

void Pagination::ClearPage()

{

int sz = m_pHPageLayout->count();

for(int i = 0; i < sz; i++)

{

QLayoutItem* item = m_pHPageLayout->takeAt(0);

QWidget* tmp = item->widget();

m_pHPageLayout->removeWidget(tmp);

delete tmp;

tmp = nullptr;

delete item;

item = nullptr;

}

m_vecPageBtn.clear();

}

void Pagination::Reload()

{

ClearPage();

int lastPage = m_nCurrentPage;

m_nCurrentPage = 1;

m_pBtnOmitFront = new QPushButton(this);

m_pBtnOmitBack = new QPushButton(this);

m_pBtnOmitFront->setStyleSheet(QStringLiteral("QPushButton{border:none;background-color:transparent;background:url(:/pagination/skin/ellipsis.png) no-repeat;background-position:center;}"

"QPushButton:hover{background:url(:/pagination/skin/FB.png) no-repeat;background-position:center;}"));

m_pBtnOmitBack->setStyleSheet(QStringLiteral("QPushButton{border:none;background-color:transparent;background:url(:/pagination/skin/ellipsis.png) no-repeat;background-position:center;}"

"QPushButton:hover{background:url(:/pagination/skin/FF.png) no-repeat;background-position:center;}"));

m_pBtnOmitFront->setCursor(QCursor(Qt::PointingHandCursor));

m_pBtnOmitBack->setCursor(QCursor(Qt::PointingHandCursor));

m_pBtnOmitFront->hide();

m_pBtnOmitBack->hide();

for(int i = 0; i < m_nDisplayPage; i++)

{

QPushButton* btn = new QPushButton(QString::number(i + 1), this);

btn->setCheckable(true);

m_pHPageLayout->addWidget(btn);

btn->setMinimumSize(32, 32);

btn->setCursor(QCursor(Qt::PointingHandCursor));

btn->setStyleSheet(QStringLiteral("QPushButton{font-size:15px;font-weight:bold;border:none;background-color:transparent;color:black;}"

"QPushButton:hover{color:#409EFF;}"

"QPushButton:pressed{color:#409EFF;}"

"QPushButton:checked{color:#409EFF;}"

"QPushButton:disabled{color:#BCBEC2;}"));

connect(btn, &QPushButton::clicked, this, &Pagination::btn_page_clicked);

m_vecPageBtn.emplace_back(btn);

}

m_pHPageLayout->insertWidget(1, m_pBtnOmitFront);

m_pHPageLayout->insertWidget(m_pHPageLayout->count() - 1, m_pBtnOmitBack);

// 初始化一次界面

ChangeView(m_nCurrentPage);

if(lastPage > m_nMaxPage) // 上次停留的頁數(shù)大于現(xiàn)在的最大頁數(shù)

m_nCurrentPage = m_nMaxPage; // 直接變成當(dāng)前最大頁數(shù)

else

m_nCurrentPage = lastPage; // 否則還是保持當(dāng)前頁數(shù)

ChangeView(m_nCurrentPage); // 再次刷新下當(dāng)前界面

// 左省略號，當(dāng)作快退，即退PAGE_STEP頁

connect(m_pBtnOmitFront, &QPushButton::clicked, this, [&](){

if(m_nCurrentPage - PAGE_STEP < MINIMUM_PAGE) m_nCurrentPage = MINIMUM_PAGE;

else m_nCurrentPage -= PAGE_STEP;

ChangeView(m_nCurrentPage);

emit PageChanged(m_nCurrentPage);

});

// 右省略號，當(dāng)作快進，即進PAGE_STEP頁

connect(m_pBtnOmitBack, &QPushButton::clicked, this, [&](){

if(m_nCurrentPage + PAGE_STEP > m_nMaxPage) m_nCurrentPage = m_nMaxPage;

else m_nCurrentPage += PAGE_STEP;

ChangeView(m_nCurrentPage);

emit PageChanged(m_nCurrentPage);

});

}

void Pagination::btn_page_clicked()

{

QPushButton* btn = qobject_cast(sender());

if(btn && btn != m_pBtnOmitFront && btn != m_pBtnOmitBack)

{

QString str = btn->text();

int nIndex = str.toInt(); // 要跳轉(zhuǎn)的頁數(shù)

QPushButton* page = FindPage(m_nCurrentPage); // 找到當(dāng)前頁數(shù)按鈕

if(page) page->setChecked(false); // 取消選中

QPushButton* nPage = FindPage(nIndex);

if(nPage) nPage->setChecked(true);

m_nCurrentPage = nIndex;

ChangeView(m_nCurrentPage);

emit PageChanged(nIndex);

}

}

//TotalItem/

TotalItem::TotalItem(QWidget *parent) : QWidget(parent), m_nTotal(0)

{

m_pLabel = new QLabel("共 0 條", this);

setObjectName("total_item");

setStyleSheet(QStringLiteral("QWidget#total_item{background-color:transparent;}"));

m_pLabel->setStyleSheet("QLabel{font-family:Microsoft Yahei;font-size:14px;}");

m_pLabel->adjustSize();

setMinimumSize(m_pLabel->size().width(), m_pLabel->size().height());

m_pLabel->move(0, (height() - m_pLabel->height()) / 2);

}

TotalItem::~TotalItem()

{

}

void TotalItem::SetTotal(int nTotal)

{

if(nTotal < 0) return;

m_nTotal = nTotal;

QString str = QString::number(nTotal);

m_pLabel->setText("共 " + str + " 條");

m_pLabel->adjustSize();

setMinimumSize(m_pLabel->size().width(), m_pLabel->size().height());

}

int TotalItem::GetTotal() const

{

return m_nTotal;

}

void TotalItem::paintEvent(QPaintEvent *event)

{

QStyleOption opt;

opt.init(this);

QPainter p(this);

style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);

QWidget::paintEvent(event);

}

///EachPageItem//

EachPageItem::EachPageItem(QWidget *parent) : QWidget(parent)

{

setObjectName("per_page_item");

setStyleSheet(QStringLiteral("QWidget#per_page_item{background-color:transparent;}"));

m_pCbx = new QComboBox(this);

m_pCbx->setFixedSize(100, 27);

setFixedSize(105, 30);

m_pCbx->setView(new QListView(this));

m_pCbx->view()->setFocusPolicy(Qt::NoFocus);

m_pCbx->setStyleSheet(QStringLiteral("QComboBox{text-align:center;font-size:15px;border:1px solid #DCDFE6;border-radius:5px;}"

"QComboBox:hover{border:1px solid #409EFF;}"

"QComboBox::drop-down{background-color:transparent;}"

"QComboBox::down-arrow{image:url(:/pagination/skin/drop_down.png);}"

"QComboBox::down-arrow:on{image:url(:/pagination/skin/drop_up.png);}"

"QComboBox QAbstractItemView{text-align:center;font-weight:bold;border:none;font-size:14px;outline:0px;}"

"QComboBox QAbstractItemView::item{border:none;color:#606266;border:none;height:30px;}"

"QComboBox QAbstractItemView::item:selected{color:#409EFF;background:rgb(245,247,250);}"));

m_pCbx->setCursor(QCursor(Qt::PointingHandCursor));

m_pCbx->move(width() / 2 - m_pCbx->width() / 2, height() / 2 - m_pCbx->height() / 2);

m_vecPage.reserve(5);

connect(m_pCbx, QOverload::of(&QComboBox::currentIndexChanged), this, [&](int index){

emit EachPageItemChanged(m_vecPage[index]);

});

}

EachPageItem::~EachPageItem()

{

}

void EachPageItem::SetItemEachPage(int *args, int size)

{

m_vecPage.clear();

m_pCbx->clear();

m_vecPage.reserve(5);

for(int i = 0; i < size; i++)

{

int n = args[i];

if(n > 0)

{

if(i > 0)

{

if(n <= m_vecPage[i - 1]) continue;

}

m_vecPage.emplace_back(n);

m_pCbx->addItem(QString::number(n) + "條/頁");

}

}

}

int EachPageItem::GetCurrent()

{

unsigned long long idx = m_pCbx->currentIndex();

if(m_vecPage.size() >= idx + 1)

{

return m_vecPage[idx];

}

else return 0;

}

void EachPageItem::paintEvent(QPaintEvent *event)

{

QStyleOption opt;

opt.init(this);

QPainter p(this);

style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);

QWidget::paintEvent(event);

}

//GotoPageItem///

GotoPageItem::GotoPageItem(QWidget *parent) : QWidget(parent)

{

setObjectName("goto_page_item");

setStyleSheet(QStringLiteral("QWidget#goto_page_item{background-color:transparent;}"));

m_pHMainLayout = new QHBoxLayout(this);

m_pLabel1 = new QLabel("前往", this);

m_pEditPage = new QLineEdit(this);

m_pLabel2 = new QLabel("頁", this);

m_pLabel1->setStyleSheet(QStringLiteral("QLabel{font-size:15px;font-family:Microsoft Yahei;}"));

m_pEditPage->setStyleSheet(QStringLiteral("QLineEdit{font-size:15px;font-family:Microsoft Yahei;border-radius:5px;border:1px solid #DCDFE6;}"

"QLineEdit:hover{border:1px solid #C0C4CC}"

"QLineEdit:focus{border:1px solid #409EFF;}"));

m_pLabel2->setStyleSheet(QStringLiteral("QLabel{font-size:15px;font-family:Microsoft Yahei;}"));

m_pLabel1->adjustSize();

m_pLabel2->adjustSize();

m_pEditPage->setFixedSize(60, 30);

QRegExp reg("[0-9]+$");

QValidator* va = new QRegExpValidator(reg, m_pEditPage);

m_pEditPage->setValidator(va);

m_pHMainLayout->addWidget(m_pLabel1);

m_pHMainLayout->addWidget(m_pEditPage);

m_pHMainLayout->addWidget(m_pLabel2);

m_pHMainLayout->addStretch();

m_pHMainLayout->setContentsMargins(0, 0, 0, 0);

m_pEditPage->installEventFilter(this);

}

GotoPageItem::~GotoPageItem()

{

}

void GotoPageItem::paintEvent(QPaintEvent *event)

{

QStyleOption opt;

opt.init(this);

QPainter p(this);

style()->drawPrimitive(QStyle::PE_Widget, &opt, &p, this);

QWidget::paintEvent(event);

}

bool GotoPageItem::eventFilter(QObject *watched, QEvent *event)

{

if(event->type() == QKeyEvent::KeyRelease)

{

Qt::Key k = static_cast((dynamic_cast(event)->key()));

if(k == Qt::Key_Return || k == Qt::Key_Enter)

{

QString str = m_pEditPage->text();

int nPage = 1;

if(!str.isEmpty()) nPage = str.toInt();

emit GotoPage(nPage);

return true;

}

}

return QWidget::eventFilter(watched, event);

}

#ifndef PAGINATION_H

#define PAGINATION_H

#include

#include

#include

#include

#include

#include

#define MINIMUM_PAGE 1

#ifndef MAX_BUTTON_COUNT

#define MAX_BUTTON_COUNT 6

#endif

#ifndef PAGE_STEP

#define PAGE_STEP 5

#endif

class TotalItem;

class EachPageItem;

class GotoPageItem;

class Pagination : public QWidget

{

Q_OBJECT

public:

explicit Pagination(QWidget *parent = nullptr);

~Pagination() override;

public:

/**

* @brief SetTotalItem 設(shè)置總條目的顯示

* @param nTotal 總條目

*/

void SetTotalItem(int nTotal);

/**

* @brief SetItemPerPage 設(shè)置每頁顯示多少條目

* @param args 條目數(shù)組，數(shù)組元素必須大于0，且后面數(shù)必須大于前面

* @param size 數(shù)組大小

*/

void SetItemPerPage(int* args, int size);

/**

* @brief Refresh 設(shè)置完條目或者每頁條目后必須調(diào)用該函數(shù)刷新

*/

void Refresh();

protected:

void Init();

void paintEvent(QPaintEvent* event) override;

private:

/**

* @brief FindPage 找到某頁

* @param nIndex 要查找的頁數(shù)，從1開始

* @return 返回找到的頁數(shù)按鈕，沒有則返回空

*/

QPushButton* FindPage(int nIndex) const;

/**

* @brief ClearPage 清除所有頁

*/

void ClearPage();

/**

* @brief ChangeView 修改頁數(shù)的顯示

* @param currentPage 當(dāng)前頁數(shù)

*/

void ChangeView(int currentPage);

/**

* @brief GetPageItem 獲取m_pHPageLayout里面的第nPos按鈕

* @param nPos 要獲取的按鈕的位置，nPos的索引從0開始

* @return 返回找到的按鈕

*/

QPushButton* GetPageItem(int nPos);

/**

* @brief Reload 重新加載分頁

*/

void Reload();

private:

QHBoxLayout* m_pHMainLayout;

QHBoxLayout* m_pHPageLayout; // 存放頁數(shù)

QPushButton* m_pBtnLeft;

QPushButton* m_pBtnRight;

QPushButton* m_pBtnOmitFront; // 前面的省略號

QPushButton* m_pBtnOmitBack; // 后面的省略號

TotalItem* m_pTotalItem;

EachPageItem* m_pItemEachPage;

GotoPageItem* m_pGotoItem;

int m_nCurrentPage; // 當(dāng)前頁數(shù)

int m_nMaxPage; // 最大頁數(shù)

int m_nDisplayPage; // 顯示的頁數(shù)

std::vector m_vecPageBtn;

signals:

void PageChanged(int nPage); // 頁碼變化

void NumberPerPageChanged(int nCount); // 每頁條碼變化

private slots:

void btn_page_clicked();

};

class TotalItem : public QWidget

{

Q_OBJECT

public:

explicit TotalItem(QWidget* parent = nullptr);

~TotalItem() override;

void SetTotal(int nTotal);

int GetTotal() const;

protected:

void paintEvent(QPaintEvent* event) override;

private:

QLabel* m_pLabel;

// QHBoxLayout* m_pHMainLayout;

int m_nTotal;

};

class EachPageItem : public QWidget

{

Q_OBJECT

public:

explicit EachPageItem(QWidget* parent = nullptr);

~EachPageItem() override;

void SetItemEachPage(int* args, int size);

int GetCurrent();

protected:

void paintEvent(QPaintEvent* event) override;

signals:

void EachPageItemChanged(int nCount);

private:

QComboBox* m_pCbx;

std::vector m_vecPage;

};

class GotoPageItem : public QWidget

{

Q_OBJECT

public:

explicit GotoPageItem(QWidget* parent = nullptr);

~GotoPageItem() override;

protected:

void paintEvent(QPaintEvent* event) override;

bool eventFilter(QObject *watched, QEvent *event) override;

signals:

void GotoPage(int nPage);

private:

QHBoxLayout* m_pHMainLayout;

QLabel* m_pLabel1;

QLineEdit* m_pEditPage;

QLabel* m_pLabel2;

};

#endif // PAGINATION_H

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