Method and device for zooming in and out of pointing area

Abstract

The invention relates to the technical field of information management tools, particularly to a directional area scale variable zoom method and device. The method comprises obtaining screen pointer directional point coordinates composed of directional point horizontal coordinates and directional point vertical coordinates, and determining a currently-directed resource stripe through the directional point vertical coordinates; taking the currently-directed resource stripe as the center, setting an upper stripe and a lower stripe and performing numbering; calculating the zoom scale factors of the upper stripe and the lower stripe; obtaining a zoom control instruction and generating zoom control factors; according to the zoom control factors and the zoom scale factors, computing the vertical coordinates of the pixel points in every resource stripe; displaying the upper stripe and the lower stripe. According to the directional area scale variable zoom method and device, different zoom scale factors are utilized according to the distance from the currently-directed stripe, the zoom strength is reduced gradually, the density-alternate visualization effects of a Gantt chart can be achieved, and meanwhile, good zoom continuity can be obtained, and repeated selection and operation can be avoided.

Description

technical field [0001] The invention relates to the technical field of information management tools, in particular to a variable-scale zooming method and device for a pointing area. Background technique [0002] Gantt chart (Gantt chart) is also called bar chart, bar chart (Bar chart). It graphically represents the sequence and duration of activities for any particular project through a list of activities and a time scale. Based on the purpose of job sequencing, it links activities with time and helps companies describe the use of resources such as work centers and overtime work. It is one of the commonly used information management tools in the field of industrial engineering. The horizontal axis of the Gantt chart is the time scale, and the vertical axis is the name of the parallel resource strips. There are several tasks distributed on each resource strip, indicating the planned and actual completion of activities or tasks during the entire period, such as activities or ...

AI Technical Summary

Problems solved by technology

When zoomed in, the number of missions displayed in the entire visual range decreases both horizontally and vertically. Although the crews and time corresponding to certain tasks can be observed in more detail, the information displayed in the visual range is significantly reduced, and the vertical direction cannot be observed. The relationship between the resource strip and other resource strips, and the relationship between the task of the resource strip and other tasks cannot be observed horizontally; when zoomed out, the horizontal time scale and the number of vertical resource strips increase at the same time, although the visible range The two dimensions of information increase, but at the same time, the tasks of concern are narrowed down, and the relationship between this resource strip and other resource strips cannot be observed, nor can the relationship between tasks of this resource strip and other tasks be observed.

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