SeExpr: /disk1/scratch/aselle/projects/seexpr/SeExpr/src/SeExprEditor/SeExprEdDialog.cpp Source File

00001 /*
00002 * (c) Disney Enterprises, Inc.  All rights reserved.
00003 *
00004 * This file is licensed under the terms of the Microsoft Public License (MS-PL)
00005 * as defined at: http://opensource.org/licenses/MS-PL.
00006 *
00007 * A complete copy of this license is included in this distribution as the file
00008 * LICENSE.
00009 *
00010 * @file SeExprEdDialog.cppp
00011 * @brief A basic editor/browser/previewer for expression editing
00012 * @author  jlacewel
00013 */
00014 
00015 #include "SeExprEdBrowser.h"
00016 #include "SeExprEdGrapher2d.h"
00017 #include "SeExprEdDialog.h"
00018 #include "SeExprEdControlCollection.h"
00019 
00020 #include <QtCore/QDir>
00021 #include <QtGui/QApplication>
00022 #include <QtGui/QLabel>
00023 #include <iostream>
00024 #include <fstream>
00025 
00026 #ifdef SEEXPR_USE_PF
00027 #   include <pathfinder/pathfinder.h>
00028 #endif
00029 
00030 #define P3D_CONFIG_ENVVAR "P3D_CONFIG_PATH"
00031 
00032 
00033 SeExprEdDialog::SeExprEdDialog(QWidget* parent)
00034     :QDialog(parent), _currentEditorIdx(0)
00035 {
00036     this->setMinimumWidth(600);
00037     QVBoxLayout* rootLayout=new QVBoxLayout(0);
00038     rootLayout->setMargin(2);
00039     this->setLayout(rootLayout);
00040 
00041     showEditorTimer = new QTimer();
00042     connect(showEditorTimer, SIGNAL(timeout()), SLOT(_showEditor()));
00043 
00044     QSplitter* vsplitter=new QSplitter( Qt::Vertical, this );
00045     rootLayout->addWidget(vsplitter);
00046 
00047     QTabWidget* topTabWidget=new QTabWidget();
00048     vsplitter->addWidget(topTabWidget);
00049 
00050     QWidget* previewLibraryWidget=new QWidget();
00051     QHBoxLayout* previewLibraryLayout=new QHBoxLayout();
00052     previewLibraryWidget->setLayout(previewLibraryLayout);
00053     topTabWidget->addTab(previewLibraryWidget,"Preview / Library");
00054 
00055     QWidget* bottomWidget=new QWidget();
00056     vsplitter->addWidget(bottomWidget);
00057     QVBoxLayout* bottomLayout=new QVBoxLayout();
00058     bottomLayout->setMargin(1);
00059     bottomWidget->setLayout(bottomLayout);
00060 
00061     // setup preview
00062     QWidget* leftWidget=new QWidget();
00063     leftWidget->setFixedWidth(450);
00064     QVBoxLayout* leftLayout=new QVBoxLayout();
00065     leftLayout->setMargin(0);
00066     leftWidget->setLayout(leftLayout);
00067     QHBoxLayout* previewLayout=new QHBoxLayout();
00068     grapher=new SeExprEdGrapherWidget(this, 200, 200);
00069     previewLayout->addWidget(grapher,0);
00070     previewCommentLabel=new QLabel();
00071     previewLayout->addWidget(previewCommentLabel,1,Qt::AlignLeft | Qt::AlignTop);
00072     leftLayout->addLayout(previewLayout);
00073     previewLibraryLayout->addWidget(leftWidget);
00074 
00075     // setup button bar
00076     //QWidget* buttonBarWidget=new QWidget();
00077     QHBoxLayout* buttonBarLayout = new QHBoxLayout();
00078     //buttonBarWidget->setLayout(buttonBarLayout);
00079     buttonBarLayout->setMargin(1);
00080     previewButton=new QPushButton("Preview");
00081     buttonBarLayout->addWidget(previewButton);
00082     saveButton = new QPushButton("Save");
00083     buttonBarLayout->addWidget(saveButton);
00084     saveAsButton = new QPushButton("Save As");
00085     buttonBarLayout->addWidget(saveAsButton);
00086     saveLocalButton = new QPushButton("Save Local");
00087     saveLocalButton->setEnabled(false);
00088     buttonBarLayout->addWidget(saveLocalButton);
00089     clearButton = new QPushButton("Clear");
00090     buttonBarLayout->addWidget(clearButton);
00091     bottomLayout->addLayout(buttonBarLayout);
00092 
00093     controls = new SeExprEdControlCollection();
00094 
00095     // controls
00096     QScrollArea* scrollArea=new QScrollArea();
00097     scrollArea->setWidget(controls);
00098     //scrollArea->setWidget(new QLabel("test\nweird\nfds\nfdsahsha\nfsdajdlsa\nfasdjjhsafd\nfasdhjdfsa\nfdasjdfsha"));
00099     scrollArea->setFocusPolicy(Qt::NoFocus);
00100     scrollArea->setMinimumHeight(100);
00101     scrollArea->setFixedWidth(450);
00102     scrollArea->setWidgetResizable(true);
00103     leftLayout->addWidget(scrollArea,1);
00104 
00105     // make button bar
00106     editor=new SeExprEditor(this,controls);
00107     connect(editor,SIGNAL(apply()),SLOT(applyExpression()));
00108     connect(editor,SIGNAL(preview()),SLOT(applyExpression()));
00109     connect(grapher,SIGNAL(preview()),SLOT(applyExpression()));
00110     bottomLayout->addWidget(editor);
00111 
00112     // make expression library browser
00113     browser=new SeExprEdBrowser(0,editor);
00114     previewLibraryLayout->addWidget(browser);
00115 
00116     // dialog buttons
00117     QHBoxLayout* buttonLayout = new QHBoxLayout(0);
00118     buttonLayout->addItem(new QSpacerItem(0,0, QSizePolicy::MinimumExpanding,
00119                 QSizePolicy::Minimum));
00120     applyButton=new QPushButton("Apply");
00121     buttonLayout->addWidget(applyButton);
00122     acceptButton=new QPushButton("Accept");
00123     buttonLayout->addWidget(acceptButton);
00124     cancelButton = new QPushButton("Cancel");
00125     buttonLayout->addWidget(cancelButton);
00126     connect(applyButton, SIGNAL(clicked()), this, SLOT(verifiedApply()));
00127     connect(acceptButton, SIGNAL(clicked()), this, SLOT(verifiedAccept()));
00128     connect(cancelButton, SIGNAL(clicked()), this, SLOT(reject()));
00129     rootLayout->addLayout(buttonLayout);
00130 
00131     setupHelp(topTabWidget);
00132 
00133     // connect buttons
00134     connect(previewButton,SIGNAL(clicked()),SLOT(applyExpression()));
00135     connect(clearButton, SIGNAL(clicked()), SLOT(clearExpression()));
00136     connect(saveButton, SIGNAL(clicked()), browser,SLOT(saveExpression()));
00137     connect(saveAsButton, SIGNAL(clicked()), browser,SLOT(saveExpressionAs()));
00138     connect(saveLocalButton, SIGNAL(clicked()), browser,SLOT(saveLocalExpressionAs()));
00139 }
00140 
00141 void SeExprEdDialog::showEditor(int idx)
00142 {
00143     _currentEditorIdx = idx;
00144     showEditorTimer->setSingleShot(true);
00145     showEditorTimer->start();
00146 }
00147 
00148 void SeExprEdDialog::_showEditor()
00149 {
00150     controls->showEditor(_currentEditorIdx);
00151 }
00152 
00153 int SeExprEdDialog::exec()
00154 {
00155     // populate the expressions
00156     browser->getExpressionDirs();
00157     browser->expandAll();
00158     return QDialog::exec();
00159 }
00160 
00161 void SeExprEdDialog::keyPressEvent(QKeyEvent* event)
00162 {
00163     if(event->key()==Qt::Key_Escape) return;
00164     return QDialog::keyPressEvent(event);
00165 }
00166 
00167 void SeExprEdDialog::verifiedApply()
00168 {
00169     applyExpression();
00170     if(grapher->expr.isValid())
00171     {
00172         emit expressionApplied();
00173     }
00174     else
00175     {
00176         QMessageBox msgBox;
00177         msgBox.setText("Your expression had possible errors.");
00178         msgBox.setInformativeText("Do you want to accept your expression anyways?");
00179         QPushButton* okButton = msgBox.addButton("OK", QMessageBox::RejectRole);
00180         msgBox.addButton("Cancel", QMessageBox::AcceptRole);
00181         int ret = msgBox.exec();
00182         Q_UNUSED(ret);
00183         if(msgBox.clickedButton() == okButton)
00184             emit expressionApplied();
00185     }
00186 }
00187 
00188 void SeExprEdDialog::verifiedAccept()
00189 {
00190     applyExpression();
00191     if(grapher->expr.isValid()){
00192         accept();
00193     }else{
00194         QMessageBox msgBox;
00195         msgBox.setText("Your expression had possible errors.");
00196         msgBox.setInformativeText("Do you want to accept your expression anyways?");
00197         QPushButton* okButton=msgBox.addButton("OK",QMessageBox::RejectRole);
00198         msgBox.addButton("Cancel",QMessageBox::AcceptRole);
00199         int ret = msgBox.exec();
00200         Q_UNUSED(ret);
00201         if(msgBox.clickedButton()==okButton) accept();
00202     }
00203 }
00204 
00205 void SeExprEdDialog::setupHelp(QTabWidget* tab)
00206 {
00207     QWidget* browserspace = new QWidget(tab);
00208     helpBrowser = new QTextBrowser(browserspace);
00209     tab->addTab(browserspace, "Help");
00210 #ifdef SEEXPR_USE_PF
00211     // TODO: Janet fix this!
00212     char *path = pf_find_first("share/doc/SeExpr/SeExpressions.html");
00213 #else
00214     char *path = (char *)"/usr/local/share/doc/SeExpr/SeExpressions.html";
00215 #endif
00216     if (path) {
00217         QString sheet="body {background-color: #eeeeee; color: #000000;} \na {color: #3333ff; text-decoration: none;}\n";
00218         helpBrowser->document()->setDefaultStyleSheet(sheet);
00219         helpBrowser->setSource(QString(path));
00220 #ifdef SEEXPR_USE_PF
00221         free(path);
00222 #endif
00223     }
00224 
00225     QPushButton* backPb = new QPushButton("Back");
00226     //backPb->setIcon(QApplication::style()->standardIcon(QStyle::SP_ArrowLeft));
00227     backPb->setEnabled(false);
00228     QPushButton* forwardPb = new QPushButton("Forward");
00229     //    forwardPb->setIcon(QApplication::style()->standardIcon(QStyle::SP_ArrowRight));
00230     forwardPb->setEnabled(false);
00231 
00232     QVBoxLayout * helpLayout = new QVBoxLayout(browserspace);
00233     QHBoxLayout * helpPbLayout = new QHBoxLayout;
00234     helpLayout->addLayout(helpPbLayout);
00235     helpPbLayout->addWidget(backPb);
00236     helpPbLayout->addWidget(forwardPb);
00237     //helpPbLayout->addItem(new QSpacerItem(0,0, QSizePolicy::MinimumExpanding,
00238     //                            QSizePolicy::Minimum));
00239     QHBoxLayout* findBar=new QHBoxLayout();
00240     helpPbLayout->addWidget(new QLabel("Find"), /*stretch*/ false);
00241     helpFindBox=new QLineEdit;
00242     helpPbLayout->addWidget(helpFindBox, /*stretch*/ false);
00243     connect(helpFindBox,SIGNAL(returnPressed()),this,SLOT(findNextInHelp()));
00244     QPushButton* nextButton=new QPushButton("Find Next");
00245     QPushButton* prevButton=new QPushButton("Find Prev");
00246     helpPbLayout->addWidget(nextButton, /*stretch*/ false);
00247     helpPbLayout->addWidget(prevButton, /*stretch*/ false);
00248     connect(nextButton,SIGNAL(clicked()),this,SLOT(findNextInHelp()));
00249     connect(prevButton,SIGNAL(clicked()),this,SLOT(findPrevInHelp()));
00250     helpPbLayout->addLayout(findBar, /*stretch*/ false);
00251     helpLayout->addWidget(helpBrowser, /*stretch*/ true);
00252     helpBrowser->setMinimumHeight(120);
00253 
00254     // wire up help browser forward/back buttons
00255     connect(backPb, SIGNAL(clicked()), helpBrowser, SLOT(backward()));
00256     connect(forwardPb, SIGNAL(clicked()), helpBrowser, SLOT(forward()));
00257     connect(helpBrowser, SIGNAL(backwardAvailable(bool)), backPb, SLOT(setEnabled(bool)));
00258     connect(helpBrowser, SIGNAL(forwardAvailable(bool)), forwardPb, SLOT(setEnabled(bool)));
00259 
00260 }
00261 
00262 void SeExprEdDialog::findHelper(QTextDocument::FindFlags flags){
00263     QTextDocument* doc=helpBrowser->document();
00264     if(prevFind!=helpFindBox->text()){
00265         prevFind=helpFindBox->text();
00266         helpBrowser->setTextCursor(QTextCursor(doc));
00267     }
00268     QTextCursor blah=doc->find(helpFindBox->text(),helpBrowser->textCursor(),flags);
00269     helpBrowser->setTextCursor(blah);
00270 }
00271 
00272 void SeExprEdDialog::findNextInHelp()
00273 {
00274     findHelper(0);
00275 }
00276 
00277 void SeExprEdDialog::findPrevInHelp(){
00278     findHelper(QTextDocument::FindBackward);
00279 }
00280 
00281 void SeExprEdDialog::applyExpression()
00282 {
00283     editor->clearErrors();
00284     // set new expression
00285     grapher->expr.setExpr(editor->getExpr());
00286     grapher->update();
00287 
00288     // set the label widget to mention that variables will not be previewed
00289     bool empty=true;
00290     if(grapher->expr.varmap.size()>0){
00291         std::stringstream s;
00292         s<<"<b>Variables not supported in preview (assumed zero):</b><br>";
00293         int count=0;
00294         for(SeExprEdExpression::VARMAP::iterator i=grapher->expr.varmap.begin();
00295                                       i!=grapher->expr.varmap.end();++i){
00296             count++;
00297             s<<"$"<<i->first<<" ";
00298             if(count%4==0) s<<"<br>";
00299         }
00300         previewCommentLabel->setText(s.str().c_str());
00301         empty=false;
00302     }else previewCommentLabel->setText("");
00303     // set the label widget to mention that variables will not be previewed
00304     if(grapher->expr.funcmap.size()>0){
00305         std::stringstream s;
00306         s<<"<b>Functions not supported in preview (assumed zero):</b><br>";
00307         int count=0;
00308         for(SeExprEdExpression::FUNCMAP::iterator i=grapher->expr.funcmap.begin();
00309                                       i!=grapher->expr.funcmap.end();++i){
00310             count++;
00311             s<<""<<i->first<<"() ";
00312             if(count%4==0) s<<"<br>";
00313         }
00314         previewCommentLabel->setText(s.str().c_str());
00315         empty=false;
00316     }
00317     if(empty) previewCommentLabel->setText("");
00318 
00319     // put errors into editor module
00320     bool valid=grapher->expr.isValid();
00321     if(!valid){
00322         const std::vector<SeExpression::Error> & errors=grapher->expr.getErrors();
00323         for(unsigned int i=0;i<errors.size();i++){
00324                 editor->addError(errors[i].startPos,errors[i].endPos,errors[i].error);
00325         }
00326         editor->nextError();
00327     }
00328 }
00329 
00330 void SeExprEdDialog::clearExpression()
00331 {
00332     browser->clearSelection();
00333     editor->setExpr("",false);
00334     grapher->expr.setExpr("");
00335     grapher->update();
00336 }
00337 
00338