Difference between revisions of "Container"
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== Transparency == | == Transparency == | ||
| − | The container widget can optionally be rendered transparent by | + | The container widget can optionally be rendered transparent by using the '''gwinContainerDraw_Transparent''' custom draw routine. |
== Example == | == Example == | ||
Revision as of 14:25, 16 August 2014
The basic container widget can be used to group other widgets together. It's a simple blank rectangle and it can be used as a parent for other widgets.
A widget can be added as a child to a container by adding the containers GHandle to the childs widget init structure:
GHandle ghContainer; GHandle ghChild; ... wi.g.parent = ghContainer; ... ghChild = gwinCreateXxx(0, &wi);
API reference
The API reference for the frame container can be found here.
Custom Draw Routines
The container widget predefines a number of custom draw routines. They can be set using gwinSetCustomDraw() or by specifying the custom draw routine in the GWidgetInit structure during creation. The predefined custom draw routines are:
| Custom Draw Routine | Description |
|---|---|
| gwinContainerDraw_Std | The client area is filled with the background color. |
| gwinContainerDraw_Transparent | The client area is not filled in at all. |
| gwinContainerDraw_Image | The parameter is an open gdispImage that is tiled to fill the client area of the frame. |
Border
The container widget can optionally be rendered with a border. To enable the border, GWIN_CONTAINER_BORDER has to be passed as a flag to the gwinContainerCreate() routine.
Note: If you want to use the container as a pop-up or top-level window element, you might want to take a look at the frame widget instead.
Transparency
The container widget can optionally be rendered transparent by using the gwinContainerDraw_Transparent custom draw routine.
Example
The following example shows how to create a container and adding a button to it.
#include "gfx.h" static GHandle ghContainer; static GHandle ghButton; static void createWidgets(void) { GWidgetInit wi; // Apply some default values for GWIN gwinWidgetClearInit(&wi); // Apply the container parameters wi.g.show = FALSE; wi.g.width = 200; wi.g.height = 150; wi.g.y = 10; wi.g.x = 10; wi.text = "Container"; ghContainer = gwinContainerCreate(0, &wi, GWIN_CONTAINER_BORDER); wi.g.show = TRUE; // Apply the button parameters wi.g.width = 120; wi.g.height = 30; wi.g.y = 10; wi.g.x = 10; wi.text = "Button"; wi.g.parent = ghContainer; ghButton = gwinButtonCreate(0, &wi); // Make the container become visible - therefore all its children // become visible as well gwinShow(ghContainer); } int main(void) { // Initialize the display gfxInit(); // Attach the mouse input gwinAttachMouse(0); // Set the widget defaults gwinSetDefaultFont(gdispOpenFont("*")); gwinSetDefaultStyle(&WhiteWidgetStyle, FALSE); gdispClear(White); // Create the widget createWidgets(); while(1) { gfxSleepMilliseconds(1000); } return 0; }
