CN103135892A - Control managing method for graphic user interface - Google Patents

Abstract

The invention relates to a control managing method for a graphic user interface and belongs to the field of an embedded graphic user interface. The method includes that a control-creating interface provided by a graphic user interface system is used for creating a root node control; after the root node control is created, a control-adding interface provided by the graphic user interface system is used for adding the created root node control into a control tree; the display order of controls on a display screen is determined by the arrangement of the laminating sequence of interfaces; after receiving touch messages and timing messages, a control system dispatches the messages to root nodes and then transfers the messages along the control tree so as to reach the corresponding controls; and the corresponding controls can make response to the messages. The control managing method for the graphic user interface has the advantages that the complexity of the system is greatly reduced owing to the utilization of the tree-form control management; and the project is easy to manage due to the utilization of the object-oriented method.

Description

A kind of control management method of graphic user interface

Technical field

The present invention relates to a kind of control management method of graphic user interface, belong to the mbedded GUI field.

Background technology

In recent years, fast development along with information household appliances, handheld device and wireless device, people increase rapidly the demand of embedded system, require also more and more higher, a large amount of embedded systems all requires to be furnished with corresponding graphic user interface (GUI, Graphics User Interface), graph user interface system has become the important component part of embedded system.

Control is managed as one of important composition of GUI, has obtained paying close attention to widely.Traditional GUI multiwindow mechanism is general to be adopted lamination order (Z order) management between window and mutually shears the screen management such as management technology, and for some low profile edges system, this method realizes more complicated.

Summary of the invention

The present invention proposes a kind of control management method of graphic user interface, little with the volume that satisfies low profile edge GUI, real-time is high, the requirement of multiwindow.

The present invention adopts following technical scheme for solving its technical matters:

A kind of control management method of graphic user interface comprises the steps:

(1) call the establishment control interface establishment root node control that graphical interface system provides;

(2) create the root node control after, the interpolation control interface that calling graphical interface system provides adds the root node control that creates in control tree to, namely establishes this control and the relation of following its relevant control;

(3) determine each control DISPLAY ORDER on display screen by the arrangement mode of the lamination order between window between each control;

(4) after control systems receives and touches message and timed message, message can be assigned on root node, and along the control tree transmission, arrive at last corresponding control, control is made response to this message.

Beneficial effect of the present invention is as follows:

The present invention has adopted the Tree control management, and use overlapping region Z sequence algorithm and raw data fill method to replace shearing the complicated calculations in territory, and greatly reduce the complicacy of system, adopted simultaneously OO method, be convenient to project management, simplified application programming.

Description of drawings

Fig. 1 is the control tree structure.

Embodiment

Below in conjunction with accompanying drawing, the invention is described in further details.

Now from control structure and control operation two aspects, this control mechanism is set forth.

This control structure is tree structure.The information of each node of tree structure comprises two aspects: control self information (as control size, position etc.) and with other activex relations (as father's control, child control etc.).

1, control structure

Figure 1 shows that a kind of control structure, it can be divided into four layers: top-level windows, window, view class and basic control (as button, label etc.).

Root node top-level windows of system maintenance, it is an implicit expression control, namely only exists and in logic, is not presented on the LCD screen.Top-level windows occupies whole screen, creates and the service equipment context.Other controls except top-level windows are after creating, must establishment get well its set membership and the Z order between the brotgher of node, namely can be by the sub-list of root node, successively find this control simultaneously, Z order between the brotgher of node has been reacted their orders in the sub-list of father's control on the one hand, represents on the other hand the sequencing that they are drawing.After message is received in drawing, begin successively down to transmit and make corresponding response from root node.

2, control operation:

(1) control creates

When control creates, just determine outward appearance, control property and relation and the event response of control, its flow process is as follows:

According to the derived relation of control class, successively call constructed fuction;

If father's control is arranged, oneself is joined in the sub-list of father's control.

(2) draw control

ActiveX drafting is that whole control tree is drawn, and its method is as follows:

The drafting of control is called the draw function of oneself one by one from the top layer control, if child control is arranged, drawing message is passed to child control, until last.Drawing and not adopt traditional shearing territory algorithm, is the simple Z order that provides according to the window management module, from Z order minimum begin draw, the meeting that the Z order is large overrides in the little control of Z order equitant part with it.But when drawing not individual control, can preserve the raw data of its display part on LCD, be convenient to redraw.

(3) hide (deletion) control mechanism

Hide (deletion) control and operate, just identify control self invalid and cut off it in the control tree relation, do not carry out substantial deletion action, its flow process is as follows:

The state of control is set to HIDE, and the inactive area sign in father's control is set, and the inactive area in father's control is made as the relative position of control;

Calculating with control has the fraternal control that overlaps, and its state is updated to REFRESH;

Writing REPAINT(in the event queue redraws) message.

(4) redraw mechanism

In the time of the redrawing the displaying contents that generally occurs in LCD and change to some extent of control, as deleted in certain control.Redraw the general control that change is arranged of only drawing, its flow process is as follows:

From top layer, successively call the repaint function of oneself.

The inactive area that checks oneself identifies whether set;

If no, travel through sub-list, the child control that finds the inactive area sign to be set, and REPAINT message is passed to it;

If have, fill inactive area with the raw data of preserving, traversal child control list, the deletion state is the control of HIDE, and the drafting state is the control of REFRESH, and all the other are ignored.

Control administrative mechanism of the present invention only has the concept of control, and window is a kind of of control.Control is divided into two kinds: container class and separate class.As its name suggests, container class can comprise other controls exactly, and separate class can not.Father's control can comprise one or more child control as container class.Control can be divided into three kinds of states: activate the ACTIVE(acquiescence), hide (HIDE) and redraw (REFREAH).System can according to the different conditions of control, carry out different operations.

Establish set membership between control by tree structure, namely form set membership between superior node and downstream site, the brother of node forms brotherhood.And the Z order of managing control by this tree structure, namely the closer to the control of root node in the bottom of display logic, in the child control list the closer to the bottom at display logic of linked list head.

In other words, the control that the Z order is large can cover the little control of Z order overlapping part with it.

Adopt the raw data method of substitution during deletion control, the method is to calculate the control that is covered by current control, then refills the content of capped control with the raw data of preserving.

Claims (1)

1. the control management method of a graphic user interface, is characterized in that, comprises the steps:

(1) call the establishment control interface establishment root node control that graphical interface system provides;

(2) create the root node control after, the interpolation control interface that calling graphical interface system provides adds the root node control that creates in control tree to, namely establishes this control and the relation of following its relevant control;

(3) determine each control DISPLAY ORDER on display screen by the arrangement mode of the lamination order between window between each control;

(4) after control systems receives and touches message and timed message, message can be assigned on root node, and along the control tree transmission, arrive at last corresponding control, control is made response to this message.

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