| 摘要 |
<p>PURPOSE:To select the size of a displayed picture with high degree of freedom by instructing the display area of a scroll bar in a state where a display magnification setting mode is set, elongating and contracting the scroll bar and controlling the display magnification of image data. CONSTITUTION:In the case that a released button if a left button, for example, a scroll control part 6 instructs an image display part 8 to display the picture again form a new coordinate position on a picture memory 11 which is obtained by calculating from the moving quantity of the scroll bar in order to scroll the displayed picture. On the other hand, in the case that a released button is a right button, it instructs the display part 8 that the elongation and contraction ratio of the scroll bar is calculated based on the moving quantity of the scroll bar and the image picture is displayed at new magnification which is calculated based on the elongation and contraction ratio by setting the left upper end of an image picture area on the memory 11 which is displayed at present as a display starting position in order to change the magnification of the displayed picture. Thus, the size of the displayed picture with the high degree of freedom is easily set.</p> |
