Sana:” ” 202 yil Informatika 10 Mavzu: 1-dars. Sodda ifodalarni hisoblash maqsad: Ta’limiy

4.5. Ilovani ishga tushirib, uning ishini kuzating:



63-DARS. RASMGA BOSHQA OBYEKTLARNI JOYLASH

1.Rasmga matn joylash. Rasmlar bilan ishlashda ko‘p uchraydiganamallardan biri bu rasmga matn joylashdir. Bu amalni bajarish uchun Canvasning usuli bo‘lgan TextOut (matn chiqarish) dan foydalaniladi. Uning uchta argumenti bo‘lib, ulardan dastlabki ikkitasi matn chiqariladigan sohaning chap yuqori burchagining koordinatalari, uchinchisi esa ekranga chiqariladigan matn satri.

Masalan, Image1.Canvas.TextOut(10,20, ‘Salom!’); operatori rasm sohasining (10, 20) nuqtasidan boshlab, ‘Salom!’ degan yozuvni chiqaradi.

Rasmga qo‘yiladigan yozuvning qanday shriftda chiqishini Canvas ning Font (shrift) nomli xossasidir. Masalan, shriftning o‘lchamini 14 qilish uchun Image1.Canvas.Font.Size:=14;, shrift rangini qizil qilish uchun Image1.Canvas.Font.Color:=clRed; operatoridan foydalaniladi.

Bu operatorlarni qo‘llash bilan tanishish uchun quyidagi ilovani yaratamiz. Unga Image va Button tugmalarini joylab, tugmani ikki marta bosamiz va quyida ko‘rsatilgan operatorlarni kiritamiz:

Image1.Canvas.Font.Size:=8;

Image1.Canvas.TextOut(10,20, '8');

Image1.Canvas.Font.Size:=14;

Image1.Canvas.Font.Color:=clRed;

Image1.Canvas.TextOut(20,20, '14');

Image1.Canvas.Font.Size:=20;

Image1.Canvas.Font.Color:=clBlue;

Image1.Canvas.TextOut(40,20, '20');

Image1.Canvas.Font.Name:='Times New Roman';

Image1.Canvas.Font.Size:=30;

Image1.Canvas.Font.Color:=clGreen;

Image1.Canvas.TextOut(70,20, '30');

Image1.Canvas.Font.Size:=40;

Image1.Canvas.Font.Color:=clBlack;

Image1.Canvas.TextOut(110,20, '40');

Image1.Canvas.Font.Size:=50;

Image1.Canvas.Font.Color:=RGB(255,0,255);

Image1.Canvas.TextOut(180,20, '50');

Ilovani ishga tushirib, uning tugmasini bosamiz.

Shriftni o‘zimiz bilgan Times New Roman ga almashtirganimizdan keyin ekrandagi math sifati yaxshilanganiga e’tibor bering.