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o Simplified example to take advantage of Fl_Table's existing features.

Browse Source 
o Replaced hard coded row/col counts.
o Enabled arrow keyboard navigation (setting Fl::OPTION_ARROW_FOCUS)
o Fixed small bug in handle() that was calling Fl_Table::handle() instead of Fl_Table_Row::handle()
  that was preventing Fl_Table_Row's row selection from working..



git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9840 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Greg Ercolano 2013-03-19 21:02:12 +00:00
parent 9c6014f2d5
commit bdd227806f
1 changed files with 11 additions and 28 deletions
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39
examples/table-with-keynav.cxx
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@ -40,24 +40,11 @@ MyTable *G_table = 0; // table widget
Fl_Output *G_sum = 0; // displays sum of user's selection
class MyTable : public Fl_Table_Row {
int row_beg, col_beg, row_end, col_end; // kb nav + mouse selection
protected:
// See if row R and column C is inside selection area
int IsSelected(int R, int C) {
if ( G_rowselect->value() == 0 )
return( (R >= row_beg && R <= col_end &&
C >= col_beg && C <= row_end) ? 1 : 0);
else
return( (R >= row_beg && R <= col_end) ? 1 : 0);
}
// Handle drawing all cells in table
void draw_cell(TableContext context, int R=0,int C=0, int X=0,int Y=0,int W=0,int H=0) {
static char s[30];
switch ( context ) {
case CONTEXT_STARTPAGE:
// Whenever we redraw the table, update row/col selection vals first
get_selection(row_beg, col_beg, col_end, row_end);
break;
case CONTEXT_COL_HEADER:
case CONTEXT_ROW_HEADER:
fl_font(FL_HELVETICA | FL_BOLD, 14);
@ -74,8 +61,8 @@ protected:
return;
case CONTEXT_CELL: {
// Keyboard nav and mouse selection highlighting
int is_select = IsSelected(R,C);
fl_draw_box(FL_THIN_UP_BOX, X, Y, W, H, is_select ? FL_YELLOW : FL_WHITE);
int selected = G_rowselect->value() ? row_selected(R) : is_selected(R,C);
fl_draw_box(FL_THIN_UP_BOX, X, Y, W, H, selected ? FL_YELLOW : FL_WHITE);
// Draw text for the cell
fl_push_clip(X+3, Y+3, W-6, H-6);
{
@ -112,9 +99,9 @@ public:
// Update the displayed sum value
int GetSelectionSum() {
int sum = -1;
for ( int R=0; R<11; R++ ) {
for ( int C=0; C<11; C++ ) {
if ( IsSelected(R,C) ) {
for ( int R=0; R<rows(); R++ ) {
for ( int C=0; C<cols(); C++ ) {
if ( G_rowselect->value() ? row_selected(R) : is_selected(R,C) ) {
if ( sum == -1 ) sum = 0;
sum += R*C;
}
@ -133,10 +120,7 @@ public:
}
// Keyboard and mouse events
int handle(int e) {
// See if selection changed
static int lastselect = 0;
int thisselect = row_beg + (row_end*11) + (col_beg*11*2) + (col_end*11*3);
int ret = Fl_Table::handle(e);
int ret = Fl_Table_Row::handle(e);
if ( e == FL_KEYBOARD && Fl::event_key() == FL_Escape ) exit(0);
switch (e) {
case FL_PUSH:
@ -144,11 +128,8 @@ public:
case FL_KEYUP:
case FL_KEYDOWN:
case FL_DRAG: {
if ( lastselect != thisselect ) { // Selection changed?
UpdateSum(); // update the sum
redraw(); // XXX: needed for row selection to redraw properly
lastselect = thisselect;
}
UpdateSum();
redraw();
ret = 1;
break;
}
@ -167,11 +148,12 @@ void RowSelect_CB(Fl_Widget *w, void*) {
G_table->UpdateSum();
}
int main() {
Fl::option(Fl::OPTION_ARROW_FOCUS, 0); // disable arrow focus nav (we want arrows to control cells)
Fl_Double_Window win(862, 312, "table-with-keynav");
win.begin();
// Create table
G_table = new MyTable(10, 30, win.w()-20, win.h()-70, "Times Table");
G_table->tooltip("Use mouse or arrow keys to make selections.\n"
G_table->tooltip("Use mouse or Shift + Arrow Keys to make selections.\n"
"Sum of selected values is shown.");
// Row select toggle button
G_rowselect = new Fl_Toggle_Button(140,10,12,12,"Row selection");
@ -186,6 +168,7 @@ int main() {
G_sum = new Fl_Output(140,G_table->y()+G_table->h()+10,160,25,"Selection Sum:");
G_sum->value("(nothing selected)");
G_sum->color(48);
G_sum->tooltip("This field shows the sum of the selected cells in the table");
win.end();
win.resizable(G_table);
win.show();