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- //----------------------------------------------------------------------------
- // ObjectWindows - (C) Copyright 1991, 1994 by Borland International
- // Tutorial application -- step11.cpp
- //----------------------------------------------------------------------------
- #include <owl/owlpch.h>
- #include <owl/applicat.h>
- #include <owl/decmdifr.h>
- #include <owl/mdi.h>
- #include <owl/mdichild.h>
- #include <owl/dc.h>
- #include <owl/inputdia.h>
- #include <owl/opensave.h>
- #include <owl/controlb.h>
- #include <owl/buttonga.h>
- #include <owl/statusba.h>
- #include <owl/gdiobjec.h>
- #include <owl/chooseco.h>
- #include <classlib/arrays.h>
- #include <stdlib.h>
- #include <string.h>
- #include "step11.rc"
-
- typedef TArray<TPoint> TPoints;
- typedef TArrayIterator<TPoint> TPointsIterator;
-
- class TLine : public TPoints {
- public:
- // Constructor to allow construction from a color and a pen size.
- // Also serves as default constructor.
- TLine(const TColor& color = TColor(0), int penSize = 1) :
- TPoints(10, 0, 10), PenSize(penSize), Color(color) {}
-
- // Functions to modify and query pen attributes.
- int QueryPenSize() const
- {
- return PenSize;
- }
-
- TColor& QueryColor()
- {
- return Color;
- }
-
- void SetPen(TColor& newColor, int penSize = 0);
- void SetPen(int penSize);
-
- // TLine draws itself. Returns true if everything went OK.
- virtual bool Draw(TDC&) const;
-
- // The == operator must be defined for the container class, even if unused
- bool operator ==(const TLine& other) const
- {
- return &other == this;
- }
-
- friend ostream& operator <<(ostream& os, const TLine& line);
- friend istream& operator >>(istream& is, TLine& line);
-
- protected:
- int PenSize;
- TColor Color;
- };
-
- void
- TLine::SetPen(int penSize)
- {
- if (penSize < 1)
- PenSize = 1;
- else
- PenSize = penSize;
- }
-
- void
- TLine::SetPen(TColor& newColor, int penSize)
- {
- // If penSize isn't the default (0), set PenSize to the new size.
- if (penSize)
- PenSize = penSize;
-
- Color = newColor;
- }
-
- bool
- TLine::Draw(TDC& dc) const
- {
- // Set pen for the dc to the values for this line
- TPen pen(Color, PenSize);
- dc.SelectObject(pen);
-
- // Iterates through the points in the line i.
- TPointsIterator j(*this);
- bool first = true;
-
- while (j) {
- TPoint p = j++;
-
- if (!first)
- dc.LineTo(p);
- else {
- dc.MoveTo(p);
- first = false;
- }
- }
- dc.RestorePen();
- return true;
- }
-
- typedef TArray<TLine> TLines;
- typedef TArrayIterator<TLine> TLinesIterator;
-
- class TDrawMDIClient : public TMDIClient {
- public:
- TDrawMDIClient() : TMDIClient()
- {
- NewChildNum = 0;
- FileData = 0;
- }
-
- TMDIChild* InitChild();
-
- TOpenSaveDialog::TData* GetFileData()
- {
- return FileData ? new TOpenSaveDialog::TData(*FileData) : 0;
- }
-
- protected:
- void CmFileNew();
- void CmFileOpen();
- void CmAbout();
-
- private:
- uint16 NewChildNum;
- TOpenSaveDialog::TData *FileData;
-
- DECLARE_RESPONSE_TABLE(TDrawMDIClient);
- };
-
- DEFINE_RESPONSE_TABLE1(TDrawMDIClient, TMDIClient)
- EV_COMMAND(CM_FILENEW, CmFileNew),
- EV_COMMAND(CM_FILEOPEN, CmFileOpen),
- EV_COMMAND(CM_ABOUT, CmAbout),
- END_RESPONSE_TABLE;
-
- // TDrawMDIChild must be declared now, because TDrawMDIClient functions
- // call TDrawMDIChild's constructor.
-
- class TDrawMDIChild : public TMDIChild {
- public:
- TDrawMDIChild(TDrawMDIClient& parent, const char* title = 0);
- ~TDrawMDIChild()
- {
- delete DragDC;
- delete Line;
- delete Lines;
- delete FileData;
- }
-
- protected:
- TDC* DragDC;
- TPen* Pen;
- TLines* Lines;
- TLine* Line; // To hold a single line at a time that later gets
- // stuck in Lines
- TOpenSaveDialog::TData* FileData;
- bool IsDirty, IsNewFile;
-
- void GetPenSize(); // GetPenSize always calls Line->SetPen().
-
- // Override member function of TWindow
- bool CanClose();
-
- // Message response functions
- void EvLButtonDown(uint, TPoint&);
- void EvRButtonDown(uint, TPoint&);
- void EvMouseMove(uint, TPoint&);
- void EvLButtonUp(uint, TPoint&);
- void Paint(TDC&, bool, TRect&);
- void CmFileSave();
- void CmFileSaveAs();
- void CmPenSize();
- void CmPenColor();
- void SaveFile();
- void OpenFile();
-
- DECLARE_RESPONSE_TABLE(TDrawMDIChild);
- };
-
- DEFINE_RESPONSE_TABLE1(TDrawMDIChild, TMDIChild)
- EV_WM_LBUTTONDOWN,
- EV_WM_RBUTTONDOWN,
- EV_WM_MOUSEMOVE,
- EV_WM_LBUTTONUP,
- EV_COMMAND(CM_FILESAVE, CmFileSave),
- EV_COMMAND(CM_FILESAVEAS, CmFileSaveAs),
- EV_COMMAND(CM_PENSIZE, CmPenSize),
- EV_COMMAND(CM_PENCOLOR, CmPenColor),
- END_RESPONSE_TABLE;
-
- // Define TDrawMDIClient functions.
-
- TMDIChild*
- TDrawMDIClient::InitChild()
- {
- char title[15];
- if(!FileData)
- wsprintf(title, "New drawing %d", NewChildNum);
-
- TMDIChild* child = new TDrawMDIChild(*this, FileData ? FileData->FileName : title);
- child->SetIcon(GetApplication(), TResId("IDI_TUTORIAL"));
- return child;
- }
-
- void
- TDrawMDIClient::CmFileNew()
- {
- FileData = 0;
- NewChildNum++;
- CreateChild();
- }
-
- void
- TDrawMDIClient::CmFileOpen()
- {
- // Create FileData.
- FileData = new TOpenSaveDialog::TData(OFN_HIDEREADONLY|OFN_FILEMUSTEXIST,
- "Point Files (*.PTS)|*.pts|", 0, "",
- "PTS");
- // As long as the file open operation goes OK...
- if ((TFileOpenDialog(this, *FileData)).Execute() == IDOK)
- // Create the child window.
- CreateChild();
-
- // FileData is no longer needed.
- FileData = 0;
- }
-
- void
- TDrawMDIClient::CmAbout()
- {
- TDialog(this, IDD_ABOUT).Execute();
- }
-
- // Define TDrawMDIChild functions.
-
- TDrawMDIChild::TDrawMDIChild(TDrawMDIClient& parent, const char* title) :
- TMDIChild(parent, title)
- {
- DragDC = 0;
- Lines = new TLines(5, 0, 5);
- Line = new TLine(TColor::Black, 1);
- IsDirty = false;
-
- // If the parent returns a valid FileData member, this is an open operation
- if(parent.GetFileData()) {
- // Not a new file
- IsNewFile = false;
- // Copy the parent's FileData member, since that'll go away
- FileData = parent.GetFileData();
- OpenFile();
- }
- // But if the parent returns 0, this is a new operation
- else {
- // This is a new file
- IsNewFile = true;
- // Create a new FileData member
- FileData = new TOpenSaveDialog::TData(OFN_HIDEREADONLY|OFN_FILEMUSTEXIST,
- "Point Files (*.PTS)|*.pts|", 0, "",
- "PTS");
- }
- }
-
- bool
- TDrawMDIChild::CanClose()
- {
- if (IsDirty)
- switch(MessageBox("Do you want to save?", "Drawing has changed",
- MB_YESNOCANCEL | MB_ICONQUESTION)) {
- case IDCANCEL:
- // Choosing Cancel means to abort the close -- return false.
- return false;
-
- case IDYES:
- // Choosing Yes means to save the drawing.
- CmFileSave();
- }
- return true;
- }
-
- void
- TDrawMDIChild::EvLButtonDown(uint, TPoint& point)
- {
- if (!DragDC) {
- SetCapture();
- DragDC = new TClientDC(*this);
- Pen = new TPen(Line->QueryColor(), Line->QueryPenSize());
- DragDC->SelectObject(*Pen);
- DragDC->MoveTo(point);
- Line->Add(point);
- IsDirty = true;
- }
- }
-
- void
- TDrawMDIChild::EvRButtonDown(uint, TPoint&)
- {
- GetPenSize();
- }
-
- void
- TDrawMDIChild::EvMouseMove(uint, TPoint& point)
- {
- if (DragDC) {
- DragDC->LineTo(point);
- Line->Add(point);
- }
- }
-
- void
- TDrawMDIChild::EvLButtonUp(uint, TPoint&)
- {
- if (DragDC) {
- ReleaseCapture();
- Lines->Add(*Line);
- Line->Flush();
- delete DragDC;
- delete Pen;
- DragDC = 0;
- }
- }
-
- void
- TDrawMDIChild::CmPenSize()
- {
- GetPenSize();
- }
-
- void
- TDrawMDIChild::CmPenColor()
- {
- TChooseColorDialog::TData colors;
- static TColor custColors[16] =
- {
- 0x010101L, 0x101010L, 0x202020L, 0x303030L,
- 0x404040L, 0x505050L, 0x606060L, 0x707070L,
- 0x808080L, 0x909090L, 0xA0A0A0L, 0xB0B0B0L,
- 0xC0C0C0L, 0xD0D0D0L, 0xE0E0E0L, 0xF0F0F0L
- };
-
- colors.Flags = CC_RGBINIT;
- colors.Color = TColor(Line->QueryColor());
- colors.CustColors = custColors;
- if (TChooseColorDialog(this, colors).Execute() == IDOK)
- Line->SetPen(colors.Color);
- }
-
- void
- TDrawMDIChild::GetPenSize()
- {
- char inputText[6];
- int penSize = Line->QueryPenSize();
-
- wsprintf(inputText, "%d", penSize);
- if ((TInputDialog(this, "Line Thickness",
- "Input a new thickness:",
- inputText,
- sizeof(inputText))).Execute() == IDOK) {
- penSize = atoi(inputText);
-
- if (penSize < 1)
- penSize = 1;
- }
- Line->SetPen(penSize);
- }
-
- void
- TDrawMDIChild::Paint(TDC& dc, bool, TRect&)
- {
- // Iterates through the array of line objects.
- TLinesIterator i(*Lines);
-
- while (i)
- i++.Draw(dc);
- }
-
- void
- TDrawMDIChild::CmFileSave()
- {
- if (IsNewFile)
- CmFileSaveAs();
- else
- SaveFile();
- }
-
- void
- TDrawMDIChild::CmFileSaveAs()
- {
- if (IsNewFile)
- strcpy(FileData->FileName, "");
-
- if ((TFileSaveDialog(this, *FileData)).Execute() == IDOK)
- SaveFile();
-
- SetCaption(FileData->FileName);
- }
-
- void
- TDrawMDIChild::SaveFile()
- {
- ofstream os(FileData->FileName);
-
- if (!os)
- MessageBox("Unable to open file", "File Error", MB_OK | MB_ICONEXCLAMATION);
- else {
- // Write the number of lines in the figure
- os << Lines->GetItemsInContainer();
-
- // Append a description using a resource string
- os << ' ' << string(*GetApplication(), IDS_FILEINFO) << '\n';
-
- // Get an iterator for the array of lines
- TLinesIterator i(*Lines);
-
- // While the iterator is valid (i.e. we haven't run out of lines)
- while (i)
- // Copy the current line from the iterator and increment the array.
- os << i++;
-
- // Set new file and dirty display indicator to false.
- IsNewFile = IsDirty = false;
- }
- }
-
- void
- TDrawMDIChild::OpenFile()
- {
- ifstream is(FileData->FileName);
-
- if (!is)
- MessageBox("Unable to open file", "File Error", MB_OK | MB_ICONEXCLAMATION);
- else {
- unsigned numLines;
- char fileinfo[100];
-
- Lines->Flush();
- Line->Flush();
-
- is >> numLines;
- is.getline(fileinfo, sizeof(fileinfo));
- Parent->SetCaption(fileinfo);
-
- for (int i = 0; i < numLines; i++) {
- TLine line;
- is >> line;
- Lines->Add(line);
- }
- }
- IsNewFile = IsDirty = false;
- Invalidate();
- }
-
- class TDrawApp : public TApplication {
- public:
- TDrawApp() : TApplication() {}
-
- void InitMainWindow();
- };
-
- void
- TDrawApp::InitMainWindow()
- {
- // Create a decorated MDI frame
- TDecoratedMDIFrame* frame = new TDecoratedMDIFrame("Drawing Pad", TResId("COMMANDS"), *new TDrawMDIClient, true);
-
- // Construct a status bar
- TStatusBar* sb = new TStatusBar(frame, TGadget::Recessed);
-
- // Construct a control bar
- TControlBar* cb = new TControlBar(frame);
- cb->Insert(*new TButtonGadget(CM_FILENEW, CM_FILENEW, TButtonGadget::Command));
- cb->Insert(*new TButtonGadget(CM_FILEOPEN, CM_FILEOPEN, TButtonGadget::Command));
- cb->Insert(*new TButtonGadget(CM_FILESAVE, CM_FILESAVE, TButtonGadget::Command));
- cb->Insert(*new TButtonGadget(CM_FILESAVEAS, CM_FILESAVEAS, TButtonGadget::Command));
- cb->Insert(*new TSeparatorGadget);
- cb->Insert(*new TButtonGadget(CM_PENSIZE, CM_PENSIZE, TButtonGadget::Command));
- cb->Insert(*new TButtonGadget(CM_PENCOLOR, CM_PENCOLOR, TButtonGadget::Command));
- cb->Insert(*new TSeparatorGadget);
- cb->Insert(*new TButtonGadget(CM_ABOUT, CM_ABOUT, TButtonGadget::Command));
-
- // Insert the status bar and control bar into the frame
- frame->Insert(*sb, TDecoratedFrame::Bottom);
- frame->Insert(*cb, TDecoratedFrame::Top);
-
- // Set the main window and its menu
- SetMainWindow(frame);
- }
-
- int
- OwlMain(int /*argc*/, char* /*argv*/ [])
- {
- return TDrawApp().Run();
- }
-
- ostream&
- operator <<(ostream& os, const TLine& line)
- {
- // Write the number of points in the line
- os << line.GetItemsInContainer();
-
- // Get and write pen attributes.
- os << ' ' << line.Color << ' ' << line.PenSize;
-
- // Get an iterator for the array of points
- TPointsIterator j(line);
-
- // While the iterator is valid (i.e. we haven't run out of points)
- while(j)
- // Write the point from the iterator and increment the array.
- os << j++;
- os << '\n';
-
- // return the stream object
- return os;
- }
-
- istream&
- operator >>(istream& is, TLine& line)
- {
- unsigned numPoints;
- is >> numPoints;
-
- COLORREF color;
- int penSize;
- is >> color >> penSize;
- line.SetPen(TColor(color), penSize);
-
- while (numPoints--) {
- TPoint point;
- is >> point;
- line.Add(point);
- }
-
- // return the stream object
- return is;
- }
-
-