curs10

Programare Windows I Visual C++ Curs 10

lect. dr. Marius Apetrii 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 îmg_bg,îmg,îmg_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);



g1->DrawImage(img,0,0,p->Width,p->Height);

try{

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);

else if(nume_instrument=="Creion")


else if(nume_instrument=="Radiera")


else 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);

else if(nume_instrument=="Dreptunghi")

g->DrawRectangle(gcnew


else if(nume_instrument=="Cerc")

g->DrawEllipse(gcnew


else if(nume_instrument=="Elipsa")

g->DrawEllipse(gcnew


if(nume_instrument=="Patrat plin")

g-

>FillRectangle(Brushes::Blue,r.X+2,r.Y+2,r.Height-4,r.Height-4);

else if(nume_instrument=="Dreptunghi plin")

g-

>FillRectangle(Brushes::Blue,r.X+2,r.Y+7,r.Height-4,r.Height-14);

else if(nume_instrument=="Cerc plin")

g->FillEllipse(Brushes::Blue,r.X+2,r.Y+2,r.Height-

4,r.Height-4);



else if(nume_instrument=="Elipsa plina")

g->FillEllipse(Brushes::Blue,r.X+2,r.Y+7,r.Height-

4,r.Height-14);

}

void schimba_culoare_fundal(){

g_bg->Clear(culoare->BackColor);

p->Refresh();

}

void schimba_imagine_fundal(){

try{

of->DefaultExt="jpeg";

of->FileName="";

of->Filter = "JPEG (*.jpeg)|*.jpeg|Bitmap Files

(*.bmp)|*.bmp|All files (*.*)|*.*";

of->FilterIndex = 1 ;

of->RestoreDirectory = true ;

of->ShowDialog();

Image^ img1=Image::FromFile(of->FileName);

g_bg->Clear(culoare_transparenta);

g_bg->DrawImage(img1,0,0,img1->Width,img1-

>Height);

p->Refresh();

}

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;

p->Refresh();

}

void instrument_linie(int x,int y,bool temporar){

g_temp->Clear(culoare_transparenta);

if(temporar)

g_temp->DrawLine(creion,x0,y0,x,y);

else

g->DrawLine(creion,x0,y0,x,y);

p->Refresh();

}

void instrument_patrat(int x,int y,bool temporar,bool plin){

int l=Math::Abs(x-x0);

if(Math::Abs(y-y0)x0?0:1),y0-

l*(y>y0?0:1),l,l);


if(temporar)

if(plin)



g_temp->FillRectangle(pensula,r);

else

g_temp->DrawRectangle(creion,r);

else

if(plin)

g->FillRectangle(pensula,r);

else

g->DrawRectangle(creion,r);

p->Refresh();

}

void instrument_dreptunghi(int x,int y,bool temporar,bool

plin){

Rectangle r=Rectangle(x0FillRectangle(pensula,r);

else

g_temp->DrawRectangle(creion,r);

else

if(plin)


else

g->DrawRectangle(creion,r);

p->Refresh();

}

void instrument_cerc(int x,int y,bool temporar,bool plin){

int l=Math::Abs(x-x0);

if(Math::Abs(y-y0)x0?0:1),y0-

l*(y>y0?0:1),l,l);


if(temporar)

if(plin)

g_temp->FillEllipse(pensula,r);

else

g_temp->DrawEllipse(creion,r);

else

if(plin)

g->FillEllipse(pensula,r);

else

g->DrawEllipse(creion,r);

p->Refresh();

}

void instrument_elipsa(int x,int y,bool temporar,bool plin){

Rectangle r=Rectangle(x0FillEllipse(pensula,r);

else

g_temp->DrawEllipse(creion,r);



else

if(plin)

g->FillEllipse(pensula,r);

else

g->DrawEllipse(creion,r);

p->Refresh();

}

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);


p->Refresh();

}

private: System::Void Form1_Load(System::Object^ sender,

System::EventArgs^ e) {

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;iItems->Add((i).ToString());

stil->SelectedIndex=0;

for(int i=0;iItems-

>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();

p->Refresh();

}

private: System::Void pictureBox2_Click(System::Object^ sender,


System::Windows::Forms::DialogResult raspuns;



raspuns = MessageBox::Show( "Creati alt desen?", "???",

MessageBoxButtons::YesNo);

if ( raspuns ==

System::Windows::Forms::DialogResult::Yes )

{

nou();

p->Refresh();

}

}

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, System::EventArgs^ e) {

creaza_creion();

}

private: System::Void stil_DrawItem(System::Object^ sender,

System::Windows::Forms::DrawItemEventArgs^ e) {

try{

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,


try{


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);


}


}

private: System::Void instrument_DrawItem(System::Object^ sender,




try{


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);


}


}

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^


schimba_culoare_fundal();

}

private: System::Void imagineFundalToolStripMenuItem_Click(System::Object^


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);

break;

case 11:

instrument_radiera(e->X,e->Y,false);

break;

}

}

private: System::Void p_MouseMove(System::Object^ sender,


if(apasat){


case 1:


break;

case 2:

instrument_linie(e->X,e->Y,true);

break;



case 3:

instrument_patrat(e->X,e-

>Y,true,false);

break;

case 4:

instrument_dreptunghi(e->X,e-

>Y,true,false);

break;

case 5:

instrument_cerc(e->X,e->Y,true,false);

break;

case 6:

instrument_elipsa(e->X,e-

>Y,true,false);

break;

case 7:

instrument_patrat(e->X,e->Y,true,true);

break;

case 8:

instrument_dreptunghi(e->X,e-

>Y,true,true);

break;

case 9:

instrument_cerc(e->X,e->Y,true,true);

break;

case 10:

instrument_elipsa(e->X,e->Y,true,true);

break;

case 11:

instrument_radiera(e->X,e->Y,false);

break;

}

}

}

private: System::Void p_MouseUp(System::Object^ sender,


apasat=false;


case 1:


break;

case 2:

instrument_linie(e->X,e->Y,false);

break;

case 3:

instrument_patrat(e->X,e->Y,false,false);

break;

case 4:

instrument_dreptunghi(e->X,e->Y,false,false);

break;

case 5:

instrument_cerc(e->X,e->Y,false,false);

break;

case 6:

instrument_elipsa(e->X,e->Y,false,false);

break;



case 7:

instrument_patrat(e->X,e->Y,false,true);

break;

case 8:

instrument_dreptunghi(e->X,e->Y,false,true);

break;

case 9:

instrument_cerc(e->X,e->Y,false,true);

break;

case 10:

instrument_elipsa(e->X,e->Y,false,true);

break;

case 11:

instrument_radiera(e->X,e->Y,true);

break;

}

}

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;

}

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