SizeControl

Change the size of a control's enclosing rectangle

#include <Controls.h> Control Manager

void SizeControl( theControl, wide, high );

ControlHandle theControl ; handle of control to re-size

short wide ; desired new width and . . .

short high ; . . . height

SizeControl changes the size of a control by hiding it, updating its

contrlRect, and redrawing it. The lop left corner of the control's rectangle

remains stationary.

theControl is a handle leading to a variable-length ControlRecord structure. It

specifies which control to re-size.

wide and . . .

high specify the desired new size of the control, in pixels.

Notes: SizeControl modifies the contents of theControl 's contrlRect by adding

wide and high to its left and top values respectively, obtaining new values

for right and bottom. The control is redrawn at its new position (if it is

currently visible).

This function is most often used to adjust the size of scroll bars after

sizing a window. For instance:

ControlHandle vsh; // vertical scroll bar handle

long newSize;

short wide, high;

// thePt will usually be theEvent->where, and theBoundRect the

// minimum and maximum sizes of the window.

newSize = GrowWindow( w, thePt, &theBoundRect );

SizeWindow( w, LoWord(newSize), HiWord(newSize), 1);

MoveControl(vsh, w->portRect.right-15,w->portRect.top-1);

wide = 16; // width of a normal vertical scroll bar

// new height is window height less grow icon

high = (w->portRect.bottom - w->portRect.top) - 14;

SizeControl(vsh, wide, high );

Referenced by (13):