Information processing device and information processing method

1. An information processing device for displaying contents formed by a plurality of pages according to user operation, the information processing device comprising:

an operation receiving section receiving an operation of changing a page as an object of display in a state in which a slide bar is in a non-display state and only pages are displayed; and

a display image control section displaying the slide bar displaying a handle indicating a position of the page being displayed on a bar representing the pages of a whole of the contents as a graphical user interface on a display device together with an image of the page being displayed,

wherein when the operation receiving section receives a user operation of sliding the handle on the slide bar, the display image control section changes display to a page corresponding to a reached position of the handle, and

when the operation receiving section receives a user operation on predetermined operating means of an input device while the slide bar is displayed, the display image control section changes display to a page serving as a predetermined break in the contents,

wherein, after the user operation on predetermined operating means is received, the display control section adds a marker to the slide bar indicating a starting location,

wherein the display image control section stops the display of the slide bar when the operation receiving section receives a user operation of setting the slide bar in the non-display state, and

wherein the operation receiving section receives an operation of changing the page as the object of display in order of the pages in a period in which the slide bar is in the non-display state.

2. The information processing device according to claim 1 ,

wherein the display image control section identifies, as the page serving as the break, a page including a beginning of a description unit formed by dividing the contents by a predetermined rule, shows an index at a position of the page including the beginning of the description unit on the slide bar, and moves the handle to a position of the index of the page when changing display to the page serving as the predetermined break,

wherein breaks are shown on the slide bar as markers at predetermined locations along the slide bar.

3. The information processing device according to claim 2 ,

wherein when description units of the contents have a hierarchical structure, the display image control section creates a row of the index for each layer, and displays a plurality of index rows concurrently on the slide bar,

wherein each index row is displayed using a different marker type.

4. The information processing device according to claim 2 ,

wherein when description units of the contents have a hierarchical structure, the display image control section creates a row of the index for each layer, and displays a row selected by a user from a plurality of created index rows on the slide bar,

wherein makers in each row are spaced according to a length of the index for each layer.

5. The information processing device according to claim 1 ,

wherein the operation receiving section receives a user operation of specifying one of two directions as the user operation for changing display to the page serving as the predetermined break, and

the display image control section changes display to the page serving as the break present next to the page being displayed in the specified direction on the slide bar.

6. The information processing device according to claim 5 ,

wherein the operation receiving section receives user operations on the same operating means of the input device as an operation for changing display to the page serving as the predetermined break and the operation of changing the page as the object of display in order of the pages, and

the display image control section determines which of the operations is performed on a basis of whether or not the slide bar is being displayed.

7. An information processing method by an information processing device for displaying contents formed by a plurality of pages according to user operation, the information processing method comprising:

reading out image data of the pages of the contents from a memory;

receiving an operation of changing a page as an object of display in a state in which a slide bar is in a non-display state and only pages are displayed; and

displaying an image of the page using the image data on a display device, and displaying the slide bar displaying a handle indicating a position of the page being displayed on a bar representing the pages of a whole of the contents as a graphical user interface on the display device,

wherein when a user operation of sliding the handle on the slide bar is received in the receiving the operation, display is changed to a page corresponding to a reached position of the handle in the displaying, and

when a user operation on predetermined operating means of an input device is received in the receiving the operation, display is changed to a page serving as a predetermined break in the contents in the displaying,

wherein after the user operation on predetermined operating means is received, the display control section adds a marker to the slide bar indicating a starting location before the display is changed,

wherein display of the slide bar is stopped when a user operation of setting the slide bar in the non-display state is performed, and

wherein the operation of changing the page as the object of display is performed only in a period in which the slide bar is in the non-display state.

8. A non-transitory computer readable recording medium storing a computer program for making a computer display contents formed by a plurality of pages according to user operation, the computer program comprising:

receiving an operation of changing a page as an object of display in a state in which a slide bar is in a non-display state and only pages are displayed; and

displaying the slide bar displaying a handle indicating a position of the page being displayed on a bar representing the pages of a whole of the contents as a graphical user interface on a display device together with an image of the page being displayed,

wherein when the receiving the operation receives a user operation of sliding the handle on the slide bar, the displaying changes display to a page corresponding to a reached position of the handle, and

when the receiving the operation receives a user operation on predetermined operating means of an input device, the displaying changes display to a page serving as a predetermined break in the contents,

wherein, after the user operation on predetermined operating means is received, the display control section adds a marker to the slide bar indicating a starting location before the display is changed,

wherein display of the slide bar is stopped when a user operation of setting the slide bar in the non-display state is performed, and

wherein the operation of changing the page as the object of display is performed only in a period in which the slide bar is in the non-display state.