Exemplu pentru utilizarea metodelor grafice

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Kory Parker
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$System::Windows::Forms::Cursor ^cursor_creion; Image ^img_bg,^img,^img_temp; Graphics ^g_bg,^g,^g_temp; int x0,y0; bool apasat; Pen^ creion; Brush^ pensula; Color culoare_transparenta; void nou(){$

1 Exemplu pentru utilizarea metodelor grafice In cadrul cursului, metodele grafice vor fi exemplificate folosind programul de mai jos. System::Windows::Forms::Cursor ^cursor_creion; Image ^img_bg,^img,^img_temp; Graphics ^g_bg,^g,^g_temp; int x0,y0; bool apasat; Pen^ creion; Brush^ pensula; Color culoare_transparenta; void nou(){ img_bg=gcnew Bitmap(p->Width,p->Height); g_bg=graphics::fromimage(img_bg); img=gcnew Bitmap(p->Width,p->Height); g=graphics::fromimage(img); img_temp=gcnew Bitmap(p->Width,p->Height); g_temp=graphics::fromimage(img_temp); void salveaza(){ Image^ img1=gcnew Bitmap(p->Width,p->Height); Graphics^ g1=graphics::fromimage(img1); g1->drawimage(img_bg,0,0,p->width,p->height); 1

2 g1->drawimage(img,0,0,p->width,p->height); sf->defaultext="jpeg"; sf->filename="figura.jpeg"; sf->filter = "JPEG files (*.jpeg) *.jpeg All files (*.*) *.*" ; sf->filterindex = 1 ; sf->restoredirectory = true ; sf->showdialog(); img1->save(sf- >FileName,System::Drawing::Imaging::ImageFormat::Jpeg); catch(exception^){ void creaza_creion(){ creion=gcnew Pen(culoare->BackColor,dimensiune- >SelectedIndex*2+1); creion->dashstyle=(drawing::drawing2d::dashstyle)stil- >SelectedIndex; void creaza_penson(){ pensula=gcnew SolidBrush(culoare->BackColor); void deseneaza_instrument(string^ nume_instrument,rectangle r,graphics^ g){ if(nume_instrument=="fundal") g->drawimage(imagelist1->images[0],r); if(nume_instrument=="creion") g->drawimage(imagelist1->images[1],r); if(nume_instrument=="radiera") g->drawimage(imagelist1->images[2],r); if(nume_instrument=="linie") g->drawline(gcnew Pen(Color::Blue,3),r.X+2,r.Y+r.Height-4,r.X+r.Width-4,r.Y+2); if(nume_instrument=="patrat") g->drawrectangle(gcnew Pen(Color::Blue,3),r.X+2,r.Y+2,r.Height-4,r.Height-4); if(nume_instrument=="dreptunghi") g->drawrectangle(gcnew Pen(Color::Blue,3),r.X+2,r.Y+7,r.Height-4,r.Height-14); if(nume_instrument=="cerc") g->drawellipse(gcnew Pen(Color::Blue,3),r.X+2,r.Y+2,r.Height-4,r.Height-4); if(nume_instrument=="elipsa") g->drawellipse(gcnew Pen(Color::Blue,3),r.X+2,r.Y+7,r.Height-4,r.Height-14); if(nume_instrument=="patrat plin") g- >FillRectangle(Brushes::Blue,r.X+2,r.Y+2,r.Height-4,r.Height-4); if(nume_instrument=="dreptunghi plin") g- >FillRectangle(Brushes::Blue,r.X+2,r.Y+7,r.Height-4,r.Height-14); if(nume_instrument=="cerc plin") g->fillellipse(brushes::blue,r.x+2,r.y+2,r.height- 4,r.Height-4); 2

3 4,r.Height-14); if(nume_instrument=="elipsa plina") g->fillellipse(brushes::blue,r.x+2,r.y+7,r.height- void schimba_culoare_fundal(){ g_bg->clear(culoare->backcolor); void schimba_imagine_fundal(){ of->defaultext="jpeg"; of->filename=""; of->filter = "JPEG (*.jpeg) *.jpeg Bitmap Files (*.bmp) *.bmp All files (*.*) *.*"; of->filterindex = 1 ; of->restoredirectory = true ; of->showdialog(); >Height); Image^ img1=image::fromfile(of->filename); g_bg->clear(culoare_transparenta); g_bg->drawimage(img1,0,0,img1->width,img1- catch(exception^){ void instrument_creion(int x,int y){ g->fillellipse(gcnew SolidBrush(creion->Color),x0-creion- >Width/2,y0-creion->Width/2,creion->Width,creion->Width); g->drawline(creion,x0,y0,x,y); x0=x; y0=y; void instrument_linie(int x,int y,bool temporar){ g_temp->drawline(creion,x0,y0,x,y); g->drawline(creion,x0,y0,x,y); void instrument_patrat(int x,int y,bool temporar,bool plin){ int l=math::abs(x-x0); if(math::abs(y-y0)<l)l=math::abs(y-y0); Rectangle r=rectangle(x0-l*(x>x0?0:1),y0- l*(y>y0?0:1),l,l); 3

4 g_temp->fillrectangle(pensula,r); g_temp->drawrectangle(creion,r); g->fillrectangle(pensula,r); g->drawrectangle(creion,r); void instrument_dreptunghi(int x,int y,bool temporar,bool plin){ Rectangle r=rectangle(x0<x?x0:x,y0<y?y0:y,math::abs(xx0),math::abs(y-y0)); g_temp->fillrectangle(pensula,r); g_temp->drawrectangle(creion,r); g->fillrectangle(pensula,r); g->drawrectangle(creion,r); void instrument_cerc(int x,int y,bool temporar,bool plin){ int l=math::abs(x-x0); if(math::abs(y-y0)<l)l=math::abs(y-y0); Rectangle r=rectangle(x0-l*(x>x0?0:1),y0- l*(y>y0?0:1),l,l); g_temp->fillellipse(pensula,r); g_temp->drawellipse(creion,r); g->fillellipse(pensula,r); g->drawellipse(creion,r); void instrument_elipsa(int x,int y,bool temporar,bool plin){ Rectangle r=rectangle(x0<x?x0:x,y0<y?y0:y,math::abs(xx0),math::abs(y-y0)); g_temp->fillellipse(pensula,r); g_temp->drawellipse(creion,r); 4

5 g->fillellipse(pensula,r); g->drawellipse(creion,r); void instrument_radiera(int x,int y,bool mouse_up){ Rectangle r=rectangle(x-creion->width/2,y-creion- >Width/2,creion->Width,creion->Width); if(!mouse_up)g_temp->fillrectangle(brushes::darkgray,r); g->fillrectangle(pensula,r); private: System::Void Form1_Load(System::Object^ sender, culoare_transparenta=color::fromargb(0,0,0,0); cursor_creion=gcnew System::Windows::Forms::Cursor("resurse\\cursor.cur"); apasat=false; nou(); for(int i=0;i<4;i++)stil->items->add((i).tostring()); stil->selectedindex=0; for(int i=0;i<9;i++)dimensiune->items- >Add((i).ToString()); dimensiune->selectedindex=1; instrument->items->add("fundal"); instrument->items->add("creion"); instrument->items->add("linie"); instrument->items->add("patrat"); instrument->items->add("dreptunghi"); instrument->items->add("cerc"); instrument->items->add("elipsa"); instrument->items->add("patrat plin"); instrument->items->add("dreptunghi plin"); instrument->items->add("cerc plin"); instrument->items->add("elipsa plina"); instrument->items->add("radiera"); instrument->selectedindex=0; creaza_creion(); creaza_penson(); private: System::Void picturebox2_click(system::object^ sender, System::Windows::Forms::DialogResult raspuns; 5

6 raspuns = MessageBox::Show( "Creati alt desen?", "???", MessageBoxButtons::YesNo); if ( raspuns == System::Windows::Forms::DialogResult::Yes ) { nou(); private: System::Void picturebox1_click(system::object^ sender, salveaza(); private: System::Void culoare_click(system::object^ sender, cd->showdialog(); culoare->backcolor=cd->color; creaza_creion(); creaza_penson(); private: System::Void stil_selectedindexchanged(system::object^ sender, creaza_creion(); private: System::Void dimensiune_selectedindexchanged(system::object^ sender, creaza_creion(); private: System::Void stil_drawitem(system::object^ sender, System::Windows::Forms::DrawItemEventArgs^ e) { e->drawbackground(); Pen^ creion = gcnew Pen(Color::Black,6); creion- >DashStyle=(System::Drawing::Drawing2D::DashStyle)e->Index; int x=2; int y=e->bounds.top+e->bounds.height/2+3; e->graphics->drawline(creion,x,y,x+e->bounds.width-4,y); e->drawfocusrectangle(); catch (Exception^) { private: System::Void dimensiune_drawitem(system::object^ sender, System::Windows::Forms::DrawItemEventArgs^ e) { e->drawbackground(); Rectangle r = Rectangle((e->Bounds.Width-(e- >Index*2+1))/2,e->Bounds.Top +(e->bounds.height-(e->index*2+1))/2,(e- >Index*2+1),(e->Index*2+1)); e->graphics->fillrectangle(brushes::black, r); e->drawfocusrectangle(); catch (Exception^) { private: System::Void instrument_drawitem(system::object^ sender, System::Windows::Forms::DrawItemEventArgs^ e) { 6

7 e->drawbackground(); Rectangle r1 = Rectangle( 2, e->bounds.top + 2,e- >Bounds.Height-4, e->bounds.height - 4 ); Rectangle r2 = Rectangle( e->bounds.height, e- >Bounds.Top + 2,e->Bounds.Width-e->Bounds.Height-2, e->bounds.height - 4 ); deseneaza_instrument(instrument->items[e->index]- >ToString(),r1,e->Graphics); System::Drawing::Font^ font = gcnew System::Drawing::Font( "Arial", 16, FontStyle::Bold ); StringFormat ^sf=gcnew StringFormat(); sf->linealignment=stringalignment::center; e->graphics->drawstring(instrument->items[e->index]- >ToString(), font,brushes::black, r2,sf); e->drawfocusrectangle(); catch (Exception^) { private: System::Void p_paint(system::object^ sender, System::Windows::Forms::PaintEventArgs^ e) { e->graphics->drawimage(img_bg,0,0,p->width,p->height); e->graphics->drawimage(img,0,0,p->width,p->height); e->graphics->drawimage(img_temp,0,0,p->width,p->height); private: System::Void culoarefundaltoolstripmenuitem_click(system::object^ sender, schimba_culoare_fundal(); private: System::Void imaginefundaltoolstripmenuitem_click(system::object^ sender, schimba_imagine_fundal(); private: System::Void p_mousedown(system::object^ sender, System::Windows::Forms::MouseEventArgs^ e) { apasat=true; x0=e->x; y0=e->y; switch(instrument->selectedindex){ case 1: instrument_creion(e->x,e->y); case 11: instrument_radiera(e->x,e->y,false); private: System::Void p_mousemove(system::object^ sender, System::Windows::Forms::MouseEventArgs^ e) { if(apasat){ switch(instrument->selectedindex){ case 1: instrument_creion(e->x,e->y); case 2: instrument_linie(e->x,e->y,true); 7

8 >Y,true,false); >Y,true,false); >Y,true,false); >Y,true,true); case 3: instrument_patrat(e->x,e- case 4: instrument_dreptunghi(e->x,e- case 5: instrument_cerc(e->x,e->y,true,false); case 6: instrument_elipsa(e->x,e- case 7: instrument_patrat(e->x,e->y,true,true); case 8: instrument_dreptunghi(e->x,e- case 9: instrument_cerc(e->x,e->y,true,true); case 10: instrument_elipsa(e->x,e->y,true,true); case 11: instrument_radiera(e->x,e->y,false); private: System::Void p_mouseup(system::object^ sender, System::Windows::Forms::MouseEventArgs^ e) { apasat=false; switch(instrument->selectedindex){ case 1: instrument_creion(e->x,e->y); case 2: instrument_linie(e->x,e->y,false); case 3: instrument_patrat(e->x,e->y,false,false); case 4: instrument_dreptunghi(e->x,e->y,false,false); case 5: instrument_cerc(e->x,e->y,false,false); case 6: instrument_elipsa(e->x,e->y,false,false); 8

9 case 7: instrument_patrat(e->x,e->y,false,true); case 8: instrument_dreptunghi(e->x,e->y,false,true); case 9: instrument_cerc(e->x,e->y,false,true); case 10: instrument_elipsa(e->x,e->y,false,true); case 11: instrument_radiera(e->x,e->y,true); private: System::Void p_mouseenter(system::object^ sender, if(instrument->selectedindex==1){ p->cursor=cursor_creion; private: System::Void p_mouseleave(system::object^ sender, p->cursor=system::windows::forms::cursors::default; 9

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