加入应用列表的翻页功能

gui/page/spkpageapplist.cpp

@@ -1,14 +1,50 @@
 
-#include <page/spkpageapplist.h>
-#include "inc/page/spkpageapplist.h"
+#include "page/spkpageapplist.h"
 #include "spkutils.h"
+#include "spkuimsg.h"
 
 namespace SpkUi
 {
   SpkPageAppList::SpkPageAppList(QWidget *parent) : SpkPageBase(parent)
   {
-    mItemLay = new SpkStretchLayout(this);
-    mItemLay->setContentsMargins(6, 6, 6, 6);
+    mAppsWidget = new QWidget;
+    mAppsArea = new QScrollArea(this);
+    mMainLay = new QVBoxLayout(this);
+    mItemLay = new SpkStretchLayout(mAppsWidget);
+
+    mPageSwitchWidget = new QWidget;
+    mPageSwitchLay = new QHBoxLayout(mPageSwitchWidget);
+    mBtnPgUp = new QPushButton;
+    mBtnPgDown = new QPushButton;
+    mBtnGotoPage = new QPushButton;
+    mPageInput = new QLineEdit;
+    mPageValidator = new QIntValidator(mPageInput);
+    mPageIndicator = new QLabel;
+
+    mPageValidator->setRange(1, 99);
+    mPageInput->setFixedWidth(50);
+    mPageInput->setValidator(mPageValidator);
+    mBtnGotoPage->setText(tr("Goto"));
+    mBtnPgUp->setText(tr("Previous"));
+    mBtnPgDown->setText(tr("Next"));
+
+    mPageSwitchLay->addWidget(mPageIndicator);
+    mPageSwitchLay->addStretch();
+    mPageSwitchLay->addWidget(mPageInput);
+    mPageSwitchLay->addWidget(mBtnGotoPage);
+    mPageSwitchLay->addWidget(mBtnPgUp);
+    mPageSwitchLay->addWidget(mBtnPgDown);
+
+    mAppsArea->setWidget(mAppsWidget);
+    mAppsArea->setWidgetResizable(true);
+
+    mMainLay->addWidget(mAppsArea);
+    mMainLay->addWidget(mPageSwitchWidget);
+    setLayout(mMainLay);
+
+    connect(mBtnPgUp, &QPushButton::clicked, this, &SpkPageAppList::PageUp);
+    connect(mBtnPgDown, &QPushButton::clicked, this, &SpkPageAppList::PageDown);
+    connect(mBtnGotoPage, &QPushButton::clicked, this, &SpkPageAppList::GotoPage);
   }
 
   void SpkPageAppList::AddApplicationEntry(QString name, QString pkgName, QString description,
@@ -78,6 +114,48 @@ namespace SpkUi
     }
   }
 
+  void SpkPageAppList::SetPageStatus(int total, int current, int itemCount)
+  {
+    mCurrentPage = current;
+    mPageIndicator->setText(tr("Page %1 / %2, %3 apps in total")
+                            .arg(current).arg(total).arg(itemCount));
+    mBtnPgUp->setDisabled(current == 1);
+    mBtnPgDown->setDisabled(total == current || total == 1);
+    mBtnGotoPage->setDisabled(total == 1);
+    mPageValidator->setTop(total);
+  }
+
+  void SpkPageAppList::DisablePageSwitchers()
+  {
+    mBtnPgDown->setDisabled(true);
+    mBtnPgUp->setDisabled(true);
+    mBtnGotoPage->setDisabled(true);
+  }
+
+  void SpkPageAppList::PageUp()
+  {
+    DisablePageSwitchers();
+    emit SwitchListPage(mCategoryId, mCurrentPage - 1);
+  }
+
+  void SpkPageAppList::PageDown()
+  {
+    DisablePageSwitchers();
+    emit SwitchListPage(mCategoryId, mCurrentPage + 1);
+  }
+
+  void SpkPageAppList::GotoPage()
+  {
+    if(mPageInput->text().isEmpty())
+      return SpkUiMessage::SendStoreNotification(tr("Please enter page number to go to!"));
+    int page = mPageInput->text().toInt();
+    if(page > mPageValidator->top())
+      return SpkUiMessage::SendStoreNotification(tr("Page %1 is not a valid page number!")
+                                                 .arg(page));
+    DisablePageSwitchers();
+    emit SwitchListPage(mCategoryId, page);
+  }
+
   void SpkPageAppList::Activated()
   {
     RES->Acquire(this, false);

gui/page/spkpagebase.cpp

@@ -1,7 +1,7 @@
 
 #include "page/spkpagebase.h"
 
-SpkPageBase::SpkPageBase(QWidget *parent) : QScrollArea(parent)
+SpkPageBase::SpkPageBase(QWidget *parent) : QWidget(parent)
 {
 
 }

gui/spkmainwindow.cpp

@@ -89,7 +89,7 @@ void SpkMainWindow::CategoryDataReceived()
   PopulateCategories(retval.toArray());
 }
 
-void SpkMainWindow::EnterCategoryList(int aCategoryId)
+void SpkMainWindow::EnterCategoryList(int aCategoryId, int aPage)
 {
   // Asynchronously call category API
   using namespace SpkUtils;
@@ -97,12 +97,14 @@ void SpkMainWindow::EnterCategoryList(int aCategoryId)
   QJsonObject reqData;
   QJsonDocument reqDoc;
   reqData.insert("type_id", QJsonValue(aCategoryId));
+  reqData.insert("page", QJsonValue(aPage));
   reqDoc.setObject(reqData);
   mCategoryAppListGetReply = STORE->SendApiRequest("application/get_application_list", reqDoc);
   DeleteReplyLater(mCategoryAppListGetReply);
   connect(mCategoryAppListGetReply, &QNetworkReply::finished,
           this, &SpkMainWindow::CategoryListDataReceived);
   setCursor(Qt::BusyCursor);
+  ui->PageAppList->SetCurrentCategory(aCategoryId); // AppList needs to remember current category
 }
 
 void SpkMainWindow::CategoryListDataReceived()
@@ -122,12 +124,27 @@ void SpkMainWindow::PopulateAppList(QJsonObject appData)
 {
   auto w = ui->PageAppList;
   w->ClearAll();
+  static auto err =
+  [](){
+    sErr("Received invalid application list data!");
+    SpkUiMessage::SendStoreNotification(tr("An invalid response was received. Please try again!"));
+    return;
+  };
+  int pgCurrent, pgTotal, totalApps;
+
+  if(appData.contains("currentPage") && appData.value("currentPage").isDouble())
+    pgCurrent = appData.value("currentPage").toInt();
+  else return err();
+  if(appData.contains("totalPages") && appData.value("totalPages").isDouble())
+    pgTotal = appData.value("totalPages").toInt();
+  else return err();
+  if(appData.contains("count") && appData.value("count").isDouble())
+    totalApps = appData.value("count").toInt();
+  else return err();
+  w->SetPageStatus(pgTotal, pgCurrent, totalApps);
 
   if(!appData.contains("data") || !appData.value("data").isArray())
-  {
-    sErrPop(tr("Received invalid application list data!"));
-    return;
-  }
+    return err();
 
   auto apps = appData.value("data").toArray();
 
@@ -165,6 +182,8 @@ void SpkMainWindow::Initialize()
 {
   connect(ui->SidebarMgr, &SpkUi::SpkSidebarSelector::SwitchToCategory,
           this, &SpkMainWindow::EnterCategoryList);
+  connect(ui->PageAppList, &SpkUi::SpkPageAppList::SwitchListPage,
+          this, &SpkMainWindow::EnterCategoryList);
 }
 
 // ==================== Main Widget Initialization ====================

gui/spkstretchlayout.cpp

@@ -19,21 +19,22 @@ void SpkStretchLayout::addItem(QLayoutItem *item)
 
 QSize SpkStretchLayout::sizeHint() const
 {
-  int n = mItems.count();
-  auto minSize = mItems.isEmpty() ? QSize { 0, 0 } : mItems.first()->minimumSize();
-  QSize s { 200, 50 }; // s: Hint
-  if(n)
-    s = s.expandedTo(QSize { minSize.width(), minSize.height() * n });
-  return s + n * QSize(spacing(), spacing());
+  if(mItems.isEmpty())
+    return { 300, 300 };
+  auto w = geometry().width();
+  auto it = mItems.first();
+  int countPerLine = w / (it->minimumSize().width() + spacing());
+  int lines = ceil((double)mItems.size() / countPerLine);
+  auto h = static_cast<int>(it->minimumSize().height() * lines + spacing() * lines);
+  return { w, h };
 }
 
 QSize SpkStretchLayout::minimumSize() const
 {
-  int n = mItems.count();
-  auto minSize = mItems.isEmpty() ? QSize { 0, 0 } : mItems.first()->minimumSize();
-  QSize s(minSize.width(), minSize.height() * n);
-  return s + n * QSize(spacing(), spacing());
-
+  // It works this way, but I honestly have no idea WHY IT WORKS
+  auto r = sizeHint();
+  r.setWidth(300);
+  return r;
 }
 
 int SpkStretchLayout::count() const
@@ -65,6 +66,9 @@ void SpkStretchLayout::setGeometry(const QRect &rect)
   // Figure out how many at most can we squeeze into one line
   int countPerLine = w / (itm->minimumSize().width() + spacing());
 
+  if(countPerLine < 1)
+    countPerLine = 1;
+
   if(countPerLine >= mItems.size()) // All items fit in one line
     size = itm->minimumSize();
   // Won't fit in one line.

inc/page/spkpageapplist.h

@@ -1,8 +1,7 @@
 
 #pragma once
 
-#include <QScrollArea>
-#include <QList>
+#include <QtWidgets>
 #include "spkresource.h"
 #include "spkappitem.h"
 #include "page/spkpagebase.h"
@@ -19,20 +18,40 @@ namespace SpkUi
       void AddApplicationEntry(QString name, QString pkgName, QString description, QString iconUrl,
                                int appId);
       void ClearAll();
+      void SetPageStatus(int total, int current, int itemCount);
+      void SetCurrentCategory(int categoryId) { mCategoryId = categoryId; }
 
     private:
+      void DisablePageSwitchers();
 
     public:
 
     private:
+      QVBoxLayout *mMainLay;
+      QHBoxLayout *mPageSwitchLay;
+      QPushButton *mBtnPgUp, *mBtnPgDown, *mBtnGotoPage;
+      QLineEdit *mPageInput;
+      QScrollArea *mAppsArea;
+      QLabel *mPageIndicator;
+      QWidget *mAppsWidget, *mPageSwitchWidget;
       SpkStretchLayout *mItemLay;
       QList<SpkAppItem *> mAppItemList;
 
+      QIntValidator *mPageValidator;
+
+      int mCategoryId, mCurrentPage;
+
     signals:
       void ApplicationClicked(QString name, QString pkgName);
+      void SwitchListPage(int categoryId, int page);
 
     public slots:
       void ResourceAcquisitionFinished(int id, ResourceResult result);
       void Activated();
+
+    private slots:
+      void PageUp();
+      void PageDown();
+      void GotoPage();
   };
 }

inc/page/spkpagebase.h

@@ -1,10 +1,10 @@
 
 #pragma once
 
-#include <QScrollArea>
+#include <QtWidgets>
 #include <spkresource.h>
 
-class SpkPageBase : public QScrollArea
+class SpkPageBase : public QWidget
 {
     Q_OBJECT
   public:

inc/spkmainwindow.h

@@ -99,7 +99,7 @@ namespace SpkUi
         }
         mLastSelectedItem = item;
         if(item->data(column, RoleItemIsCategory).toBool())
-          emit SwitchToCategory(item->data(column, RoleItemCategoryPageId).toInt());
+          emit SwitchToCategory(item->data(column, RoleItemCategoryPageId).toInt(), 0);
         else
           emit SwitchToPage(item->data(column, RoleItemCategoryPageId).toInt());
       }
@@ -117,7 +117,7 @@ namespace SpkUi
       }
 
     signals:
-      void SwitchToCategory(int aCategoryId);
+      void SwitchToCategory(int aCategoryId, int aPage);
       void SwitchToPage(int aPageId);
   };
 
@@ -179,7 +179,7 @@ class SpkMainWindow : public SpkWindow
 
     void CategoryDataReceived();
 
-    void EnterCategoryList(int id);
+    void EnterCategoryList(int aCategoryId, int aPage);
     void CategoryListDataReceived();
 
   private: