Move a widget behind all its brothers
int PtWidgetToBack( PtWidget_t *widget );
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This function moves the specified widget behind all its brothers (i.e. away from the user). All of widget's children are moved too. Any widgets damaged as a result of this operation are automatically repaired.
This function doesn't work for PtWindow widgets — their positions are controlled by the Window Manager. To move a window to the back of the workspace, use PtWindowToBack(), which is described in the Photon Widget Reference. |
#include <stdlib.h> #include <Pt.h> int main () { PtWidget_t *window, *group, *child, *child2, *child3; PtArg_t argt[5]; char *name; if (PtInit(NULL) == -1) exit(EXIT_FAILURE); if ((window = PtCreateWidget(PtWindow, Pt_NO_PARENT, 0, NULL)) == NULL) PtExit(EXIT_FAILURE); group = PtCreateWidget( PtGroup, Pt_DEFAULT_PARENT, 0, NULL ); // Create some buttons in the group. PtSetArg( &argt[0], Pt_ARG_TEXT_STRING, "Child 1", 0 ); PtCreateWidget( PtButton, Pt_DEFAULT_PARENT, 1, argt ); PtSetArg( &argt[0], Pt_ARG_TEXT_STRING, "Child 2", 0 ); child2 = PtCreateWidget( PtButton, Pt_DEFAULT_PARENT, 1, argt ); PtSetArg( &argt[0], Pt_ARG_TEXT_STRING, "Child 3", 0 ); child3 = PtCreateWidget( PtButton, Pt_DEFAULT_PARENT, 1, argt ); PtSetArg( &argt[0], Pt_ARG_TEXT_STRING, "Child 4", 0 ); PtCreateWidget( PtButton, Pt_DEFAULT_PARENT, 1, argt ); /* Traverse the group from back to front. */ printf ("From back to front:\n"); for (child = PtWidgetChildBack( group ); child; child = PtWidgetBrotherInFront( child )) { PtGetResource ( child, Pt_ARG_TEXT_STRING, &name, 0); printf (" %s\n", name); } /* Move Child 2 to the front, and Child 3 to the back. */ PtWidgetToFront (child2); PtWidgetToBack (child3); /* Traverse the group from back to front. */ printf ("From back to front:\n"); for (child = PtWidgetChildBack( group ); child; child = PtWidgetBrotherInFront( child )) { PtGetResource ( child, Pt_ARG_TEXT_STRING, &name, 0); printf (" %s\n", name); } PtRealizeWidget (window); PtMainLoop(); return EXIT_SUCCESS; }
The above code produces this output:
From back to front: Child 1 Child 2 Child 3 Child 4 From back to front: Child 3 Child 1 Child 4 Child 2
Photon
Safety: | |
---|---|
Interrupt handler | No |
Signal handler | No |
Thread | No |
PtWidgetBrotherBehind(), PtWidgetBrotherInFront(), PtWidgetChildBack(), PtWidgetChildFront(), PtWidgetInsert(), PtWidgetParent(), PtWidgetToFront()
PtWindowToBack() PtWindowToFront() in the Photon Widget Reference.
“Ordering widgets” in the Managing Widgets in Application Code chapter of the Photon Programmer's Guide